QQ2824

实训项目日志——《学生信息管理系统》part.4

实训项目日志
——《学生信息管理系统》part.4

今日份学习总结

首先，这是一篇超长博客，因为我最近光顾着打代码了，还有点感冒，所以好几天没写博客，今天一次补齐。最近主要是接着上一期的代码，写下一个阶段的程序。完成系统相应的界面化功能。在这个过程中，我学习到了：给窗口注册监听器（监听器的七个事件处理方法；而在七个方法里，其实，我们只想编写其中的一个事件处理方法：windowClosing()，为了简单起见，我们采用WindowAdapter来处理，适配器将监听器的七个抽象方法都空实现（方法体为空的实现），然后根据需要，对里面的某个或某些方法进行改写。）；以及编写一个界面的大概顺序结构，并学习了相应的定义方法及结构等等。这几天打的代码及运行效果全部都在下面用截图及文字、代码的方式记录在了下面：

过程如下：

9.创建应用程序类：（此时，因为三个窗口世界类还未创建，所以程序会报错）

10.创建窗口世界类
创建net.wxf.student.gui包：

在里面先建三个世界类：

（1）主界面窗口ManiFrame:
package net.wxf.student.gui;

import net.wxf.student.app.Application;
import net.wxf.student.bean.Status;
import net.wxf.student.service.StatusService;
import net.wxf.student.service.impl.StatusServiceImpl;

import javax.swing.;
import java.awt.;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;

/**

功能：主界面窗口
```
 通过菜单系统
```
```
 调用各个功能模块
```
作者：吴旭芳
日期：2019年6月20日
*/
public class MainFrame extends JFrame {

private Status status;
private StatusService statusService;

/**
- 构造方法
- @param title
  */
  public MainFrame(String title) {
  super(title);
  initGUI();
  }
/**
- 初始化图形用户界面
  */
  private void initGUI() {
  // 创建状态服务对象
  statusService = new StatusServiceImpl();
  // 获取状态对象
  status = statusService.findStatusById(1);
  
  // 设置窗口尺寸
  setSize(800, 640);
  // 设置窗口可见
  setVisible(true);
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  // 设置窗口标题
  setTitle(“学生信息管理系统” + status.getVersion());
  
  // 注册窗口监听器，继承窗口适配器，编写事件处理方法
  addWindowListener(new WindowAdapter() {
  @Override
  public void windowClosing(WindowEvent e) {
  exitSystem();
  }
  });
  }
/**
- 退出系统（询问用户是否要退出）
  */
  private void exitSystem() {
  int choice = JOptionPane.showConfirmDialog(this,
  “您是否要退出系统？”,“学生信息管理系统”, JOptionPane.YES_NO_OPTION);
  if (choice == JOptionPane.YES_OPTION) {
  System.exit(0);
  } else {
  // 卸载当前窗口
  dispose();
  // 重新显示主窗口
  Application.mainFrame = new MainFrame(“学生信息管理系统” + status.getVersion());
  }
}

/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  Application.mainFrame = new MainFrame("");
  }
  }
  运行主窗口效果如下：
  
  （2）用户注册窗口RegisterFrame

package net.wxf.student.gui;

import net.wxf.student.app.Application;
import net.wxf.student.bean.User;
import net.wxf.student.service.UserService;
import net.wxf.student.service.impl.UserServiceImpl;

import javax.swing.;
import java.awt.;
import java.awt.event.*;
import java.sql.Timestamp;
import java.util.Date;

import static sun.java2d.loops.GeneralRenderer.register;

/**

功能：注册窗口
作者：吴旭芳
日期：2019年6月20日
/
public class RegisterFrame extends JFrame {
/*
- 标签
  /
  private JLabel lblUsername;
  private JLabel lblPassword;
  private JLabel lblTelephone;
  /*
- 文本框
  /
  private JTextField txtUsername;
  private JPasswordField txtPassword;
  private JTextField txtTelephone;
  /*
- 按钮
  /
  private JButton btnSubmit;
  private JButton btnCancel;
  private JButton btnLogin;
  /*
- 面板
  /
  private JPanel panel;
  private JPanel panel1;
  private JPanel panel2;
  private JPanel panel3;
  private JPanel panel4;
  /*
*/
private String username;
private String password;
private String telephone;
private Date registerTime;

/**
- 构造方法
- @param title
  */
  public RegisterFrame(String title) {
  super(title);
  initGUI();
  }
/**
- 初始化图形用户界面
  */
  private void initGUI() {
  //创建组件（面板和控件）
  panel = (JPanel) getContentPane();
  panel1 = new JPanel();
  panel2 = new JPanel();
  panel3 = new JPanel();
  panel4 = new JPanel();
  
  lblUsername = new JLabel(“用户名：”);
  lblPassword = new JLabel(“密码：”);
  lblTelephone = new JLabel(“电话：”);
  txtUsername = new JTextField("",20);
  txtPassword = new JPasswordField("",20);
  txtTelephone = new JTextField("",20);
  btnSubmit = new JButton(“提交[S]”);
  btnLogin = new JButton(“登陆[L]”);
  btnCancel = new JButton(“取消[C]”);
  
  //将控件添加到四个小面板
  panel1.add(lblUsername);
  panel1.add(txtUsername);
  panel2.add(lblPassword);
  panel2.add(txtPassword);
  panel3.add(lblTelephone);
  panel3.add(txtTelephone);
  panel4.add(btnSubmit);
  panel4.add(btnLogin);
  panel4.add(btnCancel);
  //设置大面版布局，将四个小面板添加到大面板中
  panel.setLayout(new GridLayout(4,1));
  panel.add(panel1);
  panel.add(panel2);
  panel.add(panel3);
  panel.add(panel4);
  
  // 设置窗口大小
  setSize(250, 200);
  // 让窗口屏幕居中
  setLocationRelativeTo(null);
  // 设置窗口不可调整大小
  setResizable(false);
  //设置窗口刚好容纳组件
  pack();
  //设置窗口标题
  setTitle(“用户注册”);
  // 设置窗口可见
  setVisible(true);
  
  // 设置窗口默认关闭操作
  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  //注册窗口监听器，继承窗口适配器方法，编写事件处理方法
  addWindowListener(new WindowAdapter() {
  @Override
  public void windowClosing(WindowEvent e) {
  //卸载当前窗口——注册窗口
  dispose();
  //让登陆窗口可见
  Application.loginFrame.setVisible(true);
  }
  });
  //【提交】按键单击事件处理
  btnSubmit.addActionListener(new AbstractAction() {
  @Override
  public void actionPerformed(ActionEvent e) {
  register();
  }
  });
  //【提交】按钮按键事件处理
  btnSubmit.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER){
  register();
  }
  }
  });
  //【登陆】按键单击事件处理
  btnLogin.addActionListener(new AbstractAction() {
  @Override
  public void actionPerformed(ActionEvent e) {
  //显示登陆窗口
  Application.loginFrame.setVisible(true);
  //卸载当前窗口
  dispose();
  }
  });
  //【取消】按键单击事件处理
  btnCancel.addActionListener(new AbstractAction() {
  @Override
  public void actionPerformed(ActionEvent e) {
  //显示窗口
  Application.loginFrame.setVisible(true);
  //卸载当前窗口
  dispose();
  }
  });
  //【用户名】文本框按键事件处理
  txtUsername.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER){
  txtPassword.requestFocus();
  }
  }
  });
  //【密码】文本框按键事件处理
  txtPassword.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == 10){
  txtPassword.requestFocus();
  }
  }
  });
  //【电话】文本框按键事件处理
  txtTelephone.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER){
  txtTelephone.requestFocus();
  }
  }
  });
  }
  /**
- 注册方法
  */
  private void register(){
  //获取用户名
  username = txtUsername.getText().trim();
  //获取密码
  password = new String(txtPassword.getPassword());
  //获取电话号码
  telephone = txtTelephone.getText().trim();
  //定义当前时间为注册时间
  registerTime = new Timestamp(System.currentTimeMillis());
  //定义用户服务对象
  UserService userService = new UserServiceImpl();
  //创建用户
  User user = new User();
  user.setUsername(username);
  user.setPassword(password);
  user.setTelephone(telephone);
  user.getRegisterTime(registerTime);
  
  //添加用户
  int count = userService.addUser(user);
  //判断是否添加成功
  if (count > 0){
  setVisible(false);
  JOptionPane.showMessageDialog(null,“恭喜，注册成功啦٩( ‘ω’ )！و”,“学生信息管理系统”,JOptionPane.INFORMATION_MESSAGE);
  setVisible(true);
  }else {
  JOptionPane.showMessageDialog(null,“遗憾，注册失败了Σ(っ °Д °;)っ”,“学生信息管理系统”,JOptionPane.INFORMATION_MESSAGE);
  }
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  
  Application.registerFrame = new RegisterFrame("");
  }
  }

运行效果如下：

（3）用户登陆窗口LoginFrame
package net.wxf.student.gui;

import net.wxf.student.app.Application;
import net.wxf.student.bean.User;
import net.wxf.student.service.StatusService;
import net.wxf.student.service.UserService;
import net.wxf.student.service.impl.StatusServiceImpl;
import net.wxf.student.service.impl.UserServiceImpl;

import javax.swing.;
import java.awt.;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

/**

功能：登陆窗口
作者：吴旭芳
日期：2019年6月20日
*/

public class LoginFrame extends JFrame {
/**
* 变量声明

 /* 用户名
 */
private String username;
/**
 * 密码
 */
private String password;
/**
 * 用户名标签
 */
private JLabel lblUsername;
/**
 * 密码标签
 */
private JLabel lblPassword;
/**
 * 用户名文本框
 */
private JTextField txtUsername;
/**
 * 密码文本框
 */
private JPasswordField txtPassword;
/**
 * 确定按钮
 */
private JButton btnOK;
/**
 * 取消按钮
 */
private JButton btnCancel;
/**
 * 注册按钮
 */
private JButton btnRegister;
/**
 * 主面板
 */
private JPanel panel;
/**
 * 定义三行面板
 */
private JPanel panel1,panel2,panel3;


/**
 * 构造方法
 *
 * @param title
 */
public LoginFrame(String title) {
    super(title);
    // 调用初始化界面方法
    initGUI();
}

/**
 * 初始化图形用户界面
 */
private void initGUI() {
    // 实例化组件(面板和控件)
    panel = (JPanel) getContentPane();
    panel1 = new JPanel();
    panel2 = new JPanel();
    panel3 = new JPanel();

    lblUsername = new JLabel("用户名：");
    lblPassword = new JLabel("密    码：");
    txtUsername = new JTextField("", 20);
    txtPassword = new JPasswordField("", 20);
    btnOK = new JButton("确定[O]");
    btnCancel = new JButton("取消[C]");
    btnRegister = new JButton("注册[R]");

    // 将控件分别添加到三行面板
    panel1.add(lblUsername);
    panel1.add(txtUsername);
    panel2.add(lblPassword);
    panel2.add(txtPassword);
    panel3.add(btnOK);
    panel3.add(btnCancel);
    panel3.add(btnRegister);
    // 设置主面板为三行一列的网格布局
    panel.setLayout(new GridLayout(3, 1));
    // 将三行面板添加到主面板
    panel.add(panel1);
    panel.add(panel2);
    panel.add(panel3);

    // 设置按钮热键字母
    btnOK.setMnemonic(KeyEvent.VK_O);
    btnCancel.setMnemonic(KeyEvent.VK_C);
    btnRegister.setMnemonic(KeyEvent.VK_R);
    //设置密码框回显字符
    txtPassword.setEchoChar('*');

    // 设置窗口大小
    setSize(450, 400);
    // 设置窗口屏幕居中
    setLocationRelativeTo(null);
    // 设置窗口不可调整大小
    setResizable(false);
    // 设置窗口恰好容纳组件
    pack();
    // 设置窗口可见
    setVisible(true);
    // 设置窗口默认关闭操作
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    /*
     * 注册监听器，实现监听器接口，编写事件处理代码
     */
    // 确定按钮单击事件处理
    btnOK.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            login();
        }
    });

    // 确定按钮按键事件
    btnOK.addKeyListener(new KeyAdapter() {
        @Override
        public void keyPressed(KeyEvent e) {
            if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                login();
            }
        }
    });

    // 取消按钮单击事件
    btnCancel.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            System.exit(0);
        }
    });

    // 注册按钮单击事件
    btnRegister.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            // 隐藏登录窗口
            Application.loginFrame.setVisible(false);
            // 实例化注册窗口
            Application.registerFrame = new RegisterFrame("用户注册");
        }
    });

    // 用户名文本框按键事件
    txtUsername.addKeyListener(new KeyAdapter() {
        public void keyPressed(KeyEvent e) {
            if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                txtPassword.requestFocus();
            }
        }
    });

    // 密码文本框按键事件
    txtPassword.addKeyListener(new KeyAdapter() {
        public void keyPressed(KeyEvent e) {
            if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                login();
            }
        }
    });
}

/**
 * 登录方法
 */
private void login() {
    // 获取用户名
    username = txtUsername.getText().trim();
    // 获取密码
    password = new String(txtPassword.getPassword());
    // 创建用户服务对象
    UserService userService = new UserServiceImpl();
    // 用户登录
    User user = userService.login(username, password);
    // 判断是否登录成功
    if (user != null) {
        // 隐藏登录窗口
        Application.loginFrame.setVisible(false);
        // 定义状态服务对象
        StatusService statusService = new StatusServiceImpl();
        // 保存用户标识
        Application.id = user.getId();
        // 保存用户名
        Application.username = user.getUsername();
        // 提示用户登录成功
        JOptionPane.showMessageDialog(null, "欢迎使用学生信息管理系统o(≧v≦)o" + statusService.findStatusById(1).getVersion() + "！",
                "学生信息管理系统", JOptionPane.INFORMATION_MESSAGE);
        // 显示系统主窗口
        Application.mainFrame = new MainFrame("学生信息管理系统" + statusService.findStatusById(1).getVersion());
        // 释放登录窗口
        Application.loginFrame.dispose();
    } else {
        // 隐藏登录窗口
        Application.loginFrame.setVisible(false);
        // 提示用户登录失败
        JOptionPane.showMessageDialog(null, "用户名或密码错误，请重新输入(╥ω╥`)", "学生信息管理系统", JOptionPane.ERROR_MESSAGE);
        // 显示登录窗口
        Application.loginFrame.setVisible(true);
        // 用户名文本全部选中
        txtUsername.selectAll();
        // 密码文本全部选中
        txtPassword.selectAll();
        // 用户名文本框获取焦点
        txtUsername.requestFocus();
    }
}

/**
 * 主方法
 *
 * @param args
 */
public static void main(String[] args) {
    // 设置应用程序登录窗口
    Application.loginFrame = new LoginFrame("用户登录");
}

}

运行效果如下：

11、设置学校信息窗口SetCollegeInfoFrame
package net.wxf.student.gui;

import net.wxf.student.bean.College;
import net.wxf.student.service.CollegeService;
import net.wxf.student.service.impl.CollegeServiceImpl;

import javax.swing.;
import java.awt.;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.sql.Timestamp;
import java.text.ParseException;
import java.text.SimpleDateFormat;

/**

功能：设置学校信息
作者：吴旭芳
日期：2019.6.21
*/

public class SetCollegeInforFrame extends JFrame {
/**
* 面板
/
JPanel panel;
JPanel pnlNorth;
JPanel panel1;
JPanel panel2;
JPanel panel3;
JPanel panel4;
JPanel panel5;
JPanel pnlCenter;
JPanel pnlSouth;
/*
* 标签
/
JLabel lblName;
JLabel lblPresident;
JLabel lblStartTime;
JLabel lblTelephone;
JLabel lblEmail;
JLabel lblAddress;
JLabel lblProfile;
/*
* 按钮
/
JButton btnSave;
JButton btnExit;
/*
* 文本框与文本区
/
JTextField txtName;
JTextField txtPresident;
JTextField txtStartTime;
JTextField txtTelephone;
JTextField txtEmail;
JTextField txtAddress;
JTextArea txtProfile;
/*
* 滚动面板
/
JScrollPane scrollPane;
/*
* 学校服务
*/
private CollegeService collegeService;
private College college;
private int id =1;

/**
 * 构造方法
 *
 * @param title
 */
public SetCollegeInforFrame(String title){
    super(title);
    intGUI();
}

/**
 * 初始化用户界面
 */
private void intGUI() {
    //创建组件（面板与控制）
    panel = (JPanel) getContentPane();
    pnlNorth = new JPanel();
    panel1 = new JPanel();
    panel2 = new JPanel();
    panel3 = new JPanel();
    panel4 = new JPanel();
    panel5 = new JPanel();
    pnlCenter = new JPanel();
    pnlSouth = new JPanel();

    lblName = new JLabel("学校名称：");
    lblPresident = new JLabel("校  长：");
    lblStartTime = new JLabel("建校时间：");
    lblTelephone = new JLabel("联系电话：");
    lblEmail = new JLabel("电子邮箱：");
    lblAddress = new JLabel("通讯地址：");
    lblProfile = new JLabel("学校简介：");

    txtName = new JTextField(30);
    txtPresident = new JTextField(11);
    txtStartTime = new JTextField(12);
    txtTelephone = new JTextField(11);
    txtEmail = new JTextField(12);
    txtAddress = new JTextField(30);
    txtProfile = new JTextArea(5,37);
    txtProfile.setLineWrap(true);
    scrollPane = new JScrollPane(txtProfile,ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
            ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
    btnSave = new JButton("保存[S]");
    btnSave.setMnemonic(KeyEvent.VK_C);
    btnExit = new JButton("退出[X]");
    btnExit.setMnemonic(KeyEvent.VK_X);

    //设置大面板布局，将北面板、中面板、南面板添加到大面板
    panel.setLayout(new BorderLayout());
    panel.add(pnlNorth,"North");
    panel.add(pnlCenter,"Center");
    panel.add(pnlSouth,"South");
    //设置北面板布局，添加五个小面板
    pnlNorth.setLayout(new GridLayout(5,1));
    pnlNorth.add(panel1);
    pnlNorth.add(panel2);
    pnlNorth.add(panel3);
    pnlNorth.add(panel4);
    pnlNorth.add(panel5);

    //将控件依次添加到五个小面板
    panel1.add(lblName);
    panel1.add(txtName);
    panel2.add(lblPresident);
    panel2.add(txtPresident);
    panel2.add(lblStartTime);
    panel2.add(txtStartTime);
    panel3.add(lblTelephone);
    panel3.add(txtTelephone);
    panel3.add(lblEmail);
    panel3.add(txtEmail);
    panel4.add(lblAddress);
    panel4.add(txtAddress);
    panel5.add(lblProfile);
    //将滚动面板添加到中面板
    pnlCenter.add(scrollPane);
    //将两个按钮添加到南面板
    pnlSouth.add(btnSave);
    pnlSouth.add(btnExit);

    //创建学校服务对象
    collegeService = new CollegeServiceImpl();
    //获取学校对象
    college = collegeService.findCollegeById(id);
    //利用学校对象属性值设置相应的控件内容
    txtName.setText(college.getName());
    txtPresident.setText(college.getPresident());
    txtStartTime.setText(college.getStartTime().toString());
    txtTelephone.setText(college.getTelephone());
    txtEmail.setText(college.getEmail());
    txtAddress.setText(college.getAddress());
    txtProfile.setText(college.getProfile());

    //设置窗口大小
    setSize(450,350);
    //设置窗口屏幕居中
    setLocationRelativeTo(null);
    //设置窗口刚好容纳组件
    pack();
    //设置窗口标题
    setTitle("设置学校信息");
    //设置窗口可见
    setVisible(true);
    //设置窗口默认关闭操作
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    //【关闭】按钮单击处理事件
    btnExit.addActionListener(new AbstractAction() {
        @Override
        public void actionPerformed(ActionEvent event) {
            //关闭窗口
            dispose();
        }
    });
    //【保存】按钮单击事件
    btnSave.addActionListener(new AbstractAction() {
        @Override
        public void actionPerformed(ActionEvent e) {
            try {
                college.setName(txtName.getText());
                college.setPresident(txtPresident.getText());
                college.setStartTime(new Timestamp(
                        new SimpleDateFormat("yyy-mm-dd")
                                .parse(txtStartTime.getText().toString()).getTime()
                ));
                college.setTelephone(txtTelephone.getText());
                college.setAddress(txtAddress.getText());
                college.setEmail(txtEmail.getText());
                college.setProfile(txtProfile.getText());

                collegeService.updateCollege(college);

                JOptionPane.showMessageDialog(null,"更新数据成功啦٩( 'ω' )！و");
            }catch (ParseException e1){
                JOptionPane.showMessageDialog(null,"更新数据失败了Σ(っ °Д °;)っ！");
            }
        }
    });

}




/**
 * 主方法
 *
 * @param args
 */
public static void main(String[] args) {
    new SetCollegeInforFrame("");
}

}

效果如下：

12、修改用户密码窗口ChangePasswordFrame
package net.wxf.student.gui;

import net.wxf.student.app.Application;
import net.wxf.student.bean.User;
import net.wxf.student.service.UserService;
import net.wxf.student.service.impl.UserServiceImpl;

import javax.swing.;
import java.awt.;
import java.awt.event.*;

/**

功能：修改用户密码
作者：吴旭芳
日期：2019年6月22日
/
public class ChangePasswordFrame extends JFrame {
/*
- 面板
  /
  private JPanel panel;
  private JPanel pnlRow1;
  private JPanel pnlRow2;
  private JPanel pnlRow3;
  private JPanel pnlRow4;
  private JPanel pnlRow5;
  /*
- 标签
  /
  private JLabel lblUsername;
  private JLabel lblPassword;
  private JLabel lblNewPassword1;
  private JLabel lblNewPassword2;
  /*
- 文本框
  /
  private JTextField txtUsername;
  private JPasswordField txtPassword;
  private JPasswordField txtNewPassword1;
  private JPasswordField txtNewPassword2;
  /*
- 按钮
  /
  private JButton btnOK;
  private JButton btnCancel;
  /*
- 用户服务对象
  */
  private UserService userService;
/**
- 构造方法
- @param title
  */
  public ChangePasswordFrame(String title) {
  super(title);
  initGUI();
  }
/**
- 初始化用户界面
  */
  private void initGUI() {
  // 创建组件（面板与控件）
  panel = (JPanel) getContentPane();
  pnlRow1 = new JPanel();
  pnlRow2 = new JPanel();
  pnlRow3 = new JPanel();
  pnlRow4 = new JPanel();
  pnlRow5 = new JPanel();
  
  lblUsername = new JLabel(“用户名：”);
  lblPassword = new JLabel(“旧密码：”);
  lblNewPassword1 = new JLabel(“新密码：”);
  lblNewPassword2 = new JLabel(“确认：”);
  
  txtUsername = new JTextField(20);
  txtUsername.setEditable(false);
  txtPassword = new JPasswordField(20);
  txtNewPassword1 = new JPasswordField(20);
  txtNewPassword2 = new JPasswordField(20);
  
  btnOK = new JButton(“确定[O]”);
  btnOK.setMnemonic(KeyEvent.VK_O);
  btnCancel = new JButton(“取消[C]”);
  btnCancel.setMnemonic(KeyEvent.VK_C);
  
  // 设置大面板布局，添加五个小面板
  panel.setLayout(new GridLayout(5, 1));
  panel.add(pnlRow1);
  panel.add(pnlRow2);
  panel.add(pnlRow3);
  panel.add(pnlRow4);
  panel.add(pnlRow5);
  
  // 将控件添加到五个小面板
  pnlRow1.add(lblUsername);
  pnlRow1.add(txtUsername);
  pnlRow2.add(lblPassword);
  pnlRow2.add(txtPassword);
  pnlRow3.add(lblNewPassword1);
  pnlRow3.add(txtNewPassword1);
  pnlRow4.add(lblNewPassword2);
  pnlRow4.add(txtNewPassword2);
  pnlRow5.add(btnOK);
  pnlRow5.add(btnCancel);
  
  // 设置窗口不可调整大小
  setResizable(false);
  // 设置窗口刚好容纳组件
  pack();
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  // 设置窗口标题
  setTitle(“修改用户密码”);
  // 设置窗口可见
  setVisible(true);
  // 设置窗口默认关闭操作
  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  
  // 设置控件属性
  txtUsername.setEditable(false);
  txtUsername.setText(Application.username);
  
  // 【取消】按钮单击事件处理
  btnCancel.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  dispose();
  }
  });
  
  // 【确定】按钮单击事件处理
  btnOK.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  changePassword();
  }
  });
  
  // 【确定】按钮按键事件处理
  btnOK.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == 10) {
  changePassword();
  }
  }
  });
  
  // 【用户名】文本框按键事件处理
  txtUsername.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtPassword.requestFocus();
  }
  }
  });
  
  // 【密码】文本框按键事件处理
  txtPassword.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtNewPassword1.requestFocus();
  }
  }
  });
  
  // 【新密码1】文本框按键事件处理
  txtNewPassword1.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtNewPassword2.requestFocus();
  }
  }
  });
  
  // 【新密码2】文本框按键事件处理
  txtNewPassword2.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  btnOK.requestFocus();
  }
  }
  });
  }
/**
- 修改密码方法
  */
  private void changePassword() {
  // 获取用户信息
  int id = Application.id;
  String username = Application.username;
  
  // 保存用户输入的旧密码与两个新密码
  String password = new String(txtPassword.getPassword());
  String newPassword1 = new String(txtNewPassword1.getPassword());
  String newPassword2 = new String(txtNewPassword2.getPassword());
  
  // 创建学生服务对象
  userService = new UserServiceImpl();
  
  if (userService.login(username, password) == null) {
  JOptionPane.showMessageDialog(null, “旧密码错误，请重新输入(╥ω╥)！", "错误提示", JOptionPane.ERROR_MESSAGE); txtPassword.requestFocus(); txtPassword.selectAll(); } else if (newPassword1.equals("")) { JOptionPane.showMessageDialog(null, "新密码不能为空Σ(っ °Д °;)っ！", "错误提示", JOptionPane.ERROR_MESSAGE); txtNewPassword1.requestFocus(); } else if (newPassword2.equals("")) { JOptionPane.showMessageDialog(null, "确认密码不能为空Σ(っ °Д °;)っ！", "错误提示", JOptionPane.ERROR_MESSAGE); txtNewPassword2.requestFocus(); } else if (!newPassword1.equals(newPassword2)) { JOptionPane.showMessageDialog(null, "两次密码不一致，请重新输入Σ(っ °Д °;)っ！", "错误提示", JOptionPane.ERROR_MESSAGE); txtNewPassword1.setText(""); txtNewPassword2.setText(""); txtNewPassword1.requestFocus(); } else { // 按标识符获取用户 User user = userService.findUserById(id); // 修改用户的密码属性 user.setPassword(newPassword1); // 调用用户服务对象的更新方法，更新用户信息 int count = userService.updateUser(user); if (count > 0) { JOptionPane.showMessageDialog(null, "密码修改成功o(≧v≦)o！", "设置密码", JOptionPane.INFORMATION_MESSAGE); dispose(); } else { JOptionPane.showMessageDialog(null, "密码修改失败(╥ω╥)！”, “设置密码”, JOptionPane.WARNING_MESSAGE);
  }
  }
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  Application.id = 1;
  Application.username = “李刚”;
  new ChangePasswordFrame("");
  }
  }

效果如下：

13、浏览学生记录窗口
package net.wxf.student.gui;

import net.wxf.student.bean.Student;
import net.wxf.student.service.StudentService;
import net.wxf.student.service.impl.StudentServiceImpl;

import javax.swing.;
import java.awt.;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.util.List;

/**

功能：浏览学生记录
作者：吴旭芳
日期：2019年6月22日
/
public class BrowseStudentsFrame extends JFrame {
/*
- 声明面板
  /
  private JPanel panel;
  private JPanel pnlCenter;
  private JPanel pnlRow1;
  private JPanel pnlRow2;
  private JPanel pnlRow3;
  private JPanel pnlRow4;
  private JPanel pnlRow5;
  private JPanel pnlRow6;
  private JPanel pnlRow7;
  private JPanel pnlSouth;
  /*
- 声明标签
  /
  private JLabel lblId;
  private JLabel lblName;
  private JLabel lblSex;
  private JLabel lblAge;
  private JLabel lblDepartment;
  private JLabel lblClass;
  private JLabel lblTelephone;
  /*
- 声明文本框
  /
  private JTextField txtId;
  private JTextField txtName;
  private JTextField txtSex;
  private JTextField txtAge;
  private JTextField txtDepartment;
  private JTextField txtClass;
  private JTextField txtTelephone;
  /*
- 声明按钮
  */
  private JButton btnTop;
  private JButton btnPrevious;
  private JButton btnNext;
  private JButton btnBottom;
  private JButton btnExit;
/**
- 当前记录行号
  /
  private int currentRow;
  /*
- 学生列表
  /
  private List students;
  /*
- 创建学生服务对象
  */
  StudentService studentService;
/**
- 构造方法
- @param title
  */
  public BrowseStudentsFrame(String title) {
  super(title);
  initGUI();
  }
/**
- 初始化用户界面
  */
  private void initGUI() {
  // 创建组件
  panel = (JPanel) getContentPane();
  pnlCenter = new JPanel();
  pnlSouth = new JPanel();
  
  pnlRow1 = new JPanel();
  pnlRow2 = new JPanel();
  pnlRow3 = new JPanel();
  pnlRow4 = new JPanel();
  pnlRow5 = new JPanel();
  pnlRow6 = new JPanel();
  pnlRow7 = new JPanel();
  
  pnlRow1.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow2.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow3.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow4.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow5.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow6.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow7.setLayout(new FlowLayout(FlowLayout.LEFT));
  
  lblId = new JLabel(“学号：”);
  lblName = new JLabel(“姓名：”);
  lblSex = new JLabel(“性别：”);
  lblAge = new JLabel(“年龄：”);
  lblDepartment = new JLabel(“系部：”);
  lblClass = new JLabel(“班级：”);
  lblTelephone = new JLabel(“电话：”);
  
  txtId = new JTextField(40);
  txtName = new JTextField(40);
  txtSex = new JTextField(40);
  txtAge = new JTextField(40);
  txtDepartment = new JTextField(40);
  txtClass = new JTextField(40);
  txtTelephone = new JTextField(40);
  txtId.setEditable(false);
  txtName.setEditable(false);
  txtSex.setEditable(false);
  txtAge.setEditable(false);
  txtDepartment.setEditable(false);
  txtClass.setEditable(false);
  txtTelephone.setEditable(false);
  
  btnTop = new JButton(“第一条[T]”);
  btnPrevious = new JButton(“上一条[P]”);
  btnNext = new JButton(“下一条[N]”);
  btnBottom = new JButton(“最后一条[B]”);
  btnExit = new JButton(“退出[X]”);
  btnTop.setMnemonic(KeyEvent.VK_T);
  btnPrevious.setMnemonic(KeyEvent.VK_P);
  btnNext.setMnemonic(KeyEvent.VK_N);
  btnBottom.setMnemonic(KeyEvent.VK_B);
  btnExit.setMnemonic(KeyEvent.VK_X);
  
  // 添加组件
  panel.setLayout(new BorderLayout());
  panel.add(pnlCenter, BorderLayout.CENTER);
  panel.add(pnlSouth, BorderLayout.SOUTH);
  pnlCenter.setLayout(new GridLayout(7, 1));
  
  pnlCenter.add(pnlRow1);
  pnlCenter.add(pnlRow2);
  pnlCenter.add(pnlRow3);
  pnlCenter.add(pnlRow4);
  pnlCenter.add(pnlRow5);
  pnlCenter.add(pnlRow6);
  pnlCenter.add(pnlRow7);
  
  pnlRow1.add(lblId);
  pnlRow1.add(txtId);
  pnlRow2.add(lblName);
  pnlRow2.add(txtName);
  pnlRow3.add(lblSex);
  pnlRow3.add(txtSex);
  pnlRow4.add(lblAge);
  pnlRow4.add(txtAge);
  pnlRow5.add(lblDepartment);
  pnlRow5.add(txtDepartment);
  pnlRow6.add(lblClass);
  pnlRow6.add(txtClass);
  pnlRow7.add(lblTelephone);
  pnlRow7.add(txtTelephone);
  
  pnlSouth.add(btnTop);
  pnlSouth.add(btnPrevious);
  pnlSouth.add(btnNext);
  pnlSouth.add(btnBottom);
  pnlSouth.add(btnExit);
  
  // 设置窗口属性
  setSize(500, 300);
  // 设置窗口不可调整大小
  setResizable(false);
  // 设置窗口刚好容纳组件
  pack();
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  // 设置窗口可见
  setVisible(true);
  // 设置窗口默认关闭操作
  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  
  // 创建学生服务对象
  studentService = new StudentServiceImpl();
  // 获取全部学生列表
  students = studentService.findAllStudents();
  // 判断是否有学生记录
  if (students.size() > 0) {
  // 设置当前记录号
  currentRow = 1;
  // 设置窗口标题
  setTitle(“浏览学生表记录” + " && 当前记录：" + currentRow);
  // 填充窗口各文本框数据
  fillFrameData(currentRow);
  } else {
  JOptionPane.showMessageDialog(null, “表中没有记录！”, “浏览学生表记录”, JOptionPane.ERROR_MESSAGE);
  btnTop.setEnabled(false);
  btnPrevious.setEnabled(false);
  btnNext.setEnabled(false);
  btnBottom.setEnabled(false);
  }
  
  // 【第一条】按钮单击事件
  btnTop.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  // 设置当前记录号
  currentRow = 1;
  // 填充当前记录数据
  fillFrameData(currentRow);
  }
  });
  
  // 【上一条】按钮单击事件
  btnPrevious.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  if (currentRow > 1) {
  // 设置当前记录号
  currentRow–;
  // 填充当前记录数据
  fillFrameData(currentRow);
  } else {
  JOptionPane.showMessageDialog(null, “已到第一条记录啦_(:3」∠❀)_！”, “浏览学生表记录”, JOptionPane.WARNING_MESSAGE);
  }
  }
  });
  
  // 【下一条】按钮单击事件
  btnNext.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  if (currentRow < students.size() - 1) {
  // 设置当前记录号
  currentRow++;
  // 填充当前记录数据
  fillFrameData(currentRow);
  } else {
  JOptionPane.showMessageDialog(null, “已到最后一条记录啦_(:3」∠❀)_！”, “浏览学生表记录”, JOptionPane.WARNING_MESSAGE);
  }
  }
  });
  
  // 【最后一条】按钮单击事件
  btnBottom.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  // 设置当前记录号
  currentRow = students.size() - 1;
  // 填充当前记录数据
  fillFrameData(currentRow);
  }
  });
  
  // 【退出】按钮单击事件
  btnExit.addActionListener(new ActionListener() {
```
 @Override
 public void actionPerformed(ActionEvent e) {
     dispose();
 }
```
  });
  }
/**
- 将当前记录数据填充窗口各文本框
- @param currentRow
  */
  private void fillFrameData(int currentRow) {
  if (currentRow > 0) {
  setTitle(“浏览学生表记录” + " && 当前记录：" + currentRow);
  txtId.setText(students.get(currentRow).getId());
  txtName.setText(students.get(currentRow).getName());
  txtSex.setText(students.get(currentRow).getSex());
  txtAge.setText(students.get(currentRow).getAge() + “”);
  txtDepartment.setText(students.get(currentRow).getDepartment());
  txtClass.setText(students.get(currentRow).getClazz());
  txtTelephone.setText(students.get(currentRow).getTelephone());
  }
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  new BrowseStudentsFrame("");
  }
  }

运行效果：

14、添加用户记录界面

package net.wxf.student.gui;

import net.wxf.student.bean.Student;
import net.wxf.student.service.StudentService;
import net.wxf.student.service.impl.StudentServiceImpl;

import javax.swing.;
import java.awt.;
import java.awt.event.*;
import java.util.List;

/**

功能：添加学生记录
作者：吴旭芳
日期：2019年6月22日
/
public class AddStudentFrame extends JFrame {
/*
- 声明面板
  /
  private JPanel panel;
  private JPanel pnlCenter;
  private JPanel pnlRow1;
  private JPanel pnlRow2;
  private JPanel pnlRow3;
  private JPanel pnlRow4;
  private JPanel pnlRow5;
  private JPanel pnlRow6;
  private JPanel pnlRow7;
  private JPanel pnlSouth;
  /*
- 声明标签
  /
  private JLabel lblId;
  private JLabel lblName;
  private JLabel lblSex;
  private JLabel lblAge;
  private JLabel lblDepartment;
  private JLabel lblClass;
  private JLabel lblTelephone;
  /*
- 声明文本框
  /
  private JTextField txtId;
  private JTextField txtName;
  private JTextField txtSex;
  private JTextField txtAge;
  private JTextField txtDepartment;
  private JTextField txtClass;
  private JTextField txtTelephone;
  /*
- 声明按钮
  /
  private JButton btnExit;
  private JButton btnOK;
  private JButton btnCancel;
  /*
- 当前记录行号
  /
  private int currentRow;
  /*
- 学生列表
  */
  private List students;
/**
- 构造方法
- @param title
  */
  public AddStudentFrame(String title) {
  super(title);
  initGUI();
  }
/**
- 初始化用户界面
  */
  private void initGUI() {
  // 创建组件
  panel = (JPanel) getContentPane();
  pnlCenter = new JPanel();
  pnlSouth = new JPanel();
  
  pnlRow1 = new JPanel();
  pnlRow2 = new JPanel();
  pnlRow3 = new JPanel();
  pnlRow4 = new JPanel();
  pnlRow5 = new JPanel();
  pnlRow6 = new JPanel();
  pnlRow7 = new JPanel();
  
  pnlRow1.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow2.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow3.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow4.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow5.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow6.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow7.setLayout(new FlowLayout(FlowLayout.LEFT));
  
  lblId = new JLabel(“学号：”);
  lblName = new JLabel(“姓名：”);
  lblSex = new JLabel(“性别：”);
  lblAge = new JLabel(“年龄：”);
  lblDepartment = new JLabel(“系部：”);
  lblClass = new JLabel(“班级：”);
  lblTelephone = new JLabel(“电话：”);
  
  txtId = new JTextField(20);
  txtName = new JTextField(20);
  txtSex = new JTextField(20);
  txtAge = new JTextField(20);
  txtDepartment = new JTextField(20);
  txtClass = new JTextField(20);
  txtTelephone = new JTextField(20);
  btnOK = new JButton(“确定[O]”);
  btnCancel = new JButton(“取消[C]”);
  btnExit = new JButton(“退出[X]”);
  btnOK.setMnemonic(KeyEvent.VK_O);
  btnCancel.setMnemonic(KeyEvent.VK_C);
  btnExit.setMnemonic(KeyEvent.VK_X);
  
  // 添加组件
  panel.setLayout(new BorderLayout());
  panel.add(pnlCenter, BorderLayout.CENTER);
  panel.add(pnlSouth, BorderLayout.SOUTH);
  pnlCenter.setLayout(new GridLayout(7, 1));
  pnlCenter.add(pnlRow1);
  pnlCenter.add(pnlRow2);
  pnlCenter.add(pnlRow3);
  pnlCenter.add(pnlRow4);
  pnlCenter.add(pnlRow5);
  pnlCenter.add(pnlRow6);
  pnlCenter.add(pnlRow7);
  
  pnlRow1.add(lblId);
  pnlRow1.add(txtId);
  pnlRow2.add(lblName);
  pnlRow2.add(txtName);
  pnlRow3.add(lblSex);
  pnlRow3.add(txtSex);
  pnlRow4.add(lblAge);
  pnlRow4.add(txtAge);
  pnlRow5.add(lblDepartment);
  pnlRow5.add(txtDepartment);
  pnlRow6.add(lblClass);
  pnlRow6.add(txtClass);
  pnlRow7.add(lblTelephone);
  pnlRow7.add(txtTelephone);
  
  pnlSouth.add(btnOK);
  pnlSouth.add(btnCancel);
  pnlSouth.add(btnExit);
  
  // 设置窗口属性
  setSize(500, 400);
  // 设置窗口不可调整大小
  setResizable(false);
  // 设置窗口刚好容纳组件
  pack();
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  // 设置窗口标题
  setTitle(“添加学生记录”);
  // 设置窗口可见
  setVisible(true);
  // 设置窗口默认关闭操作
  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  
  // 【确定】按钮单击事件
  btnOK.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  // 学号非空校验
  if (txtId.getText().trim().equals("")) {
  JOptionPane.showMessageDialog(null, “学号不能为空Σ(っ °Д °;)っ！”, “增加学生记录”, JOptionPane.WARNING_MESSAGE);
  txtId.requestFocus();
  return;
  }
```
     // 年龄数字校验
     if (!isNumber(txtAge.getText().trim())) {
         JOptionPane.showMessageDialog(null, "注意：年龄全由数字构成！", "增加学生记录", JOptionPane.WARNING_MESSAGE);
         txtAge.setText("");
         txtAge.requestFocus();
         return;
     }

     // 创建学生实体
     Student student = new Student();
     // 设置学生实体属性
     student.setId(txtId.getText().trim());
     student.setName(txtName.getText().trim());
     student.setSex(txtSex.getText().trim());
     student.setAge(Integer.parseInt(txtAge.getText()));
     student.setDepartment(txtDepartment.getText().trim());
     student.setClazz(txtClass.getText().trim());
     student.setTelephone(txtTelephone.getText().trim());

     // 创建学生服务对象
     StudentService studentService = new StudentServiceImpl();
     // 添加学生记录
     int count = studentService.addStudent(student);
     // 判断是否添加成功
     if (count > 0) {
         JOptionPane.showMessageDialog(null, "添加记录成功啦o(≧v≦)o！", "增加学生记录", JOptionPane.INFORMATION_MESSAGE);
         txtId.setText("");
         txtName.setText("");
         txtSex.setText("");
         txtAge.setText("");
         txtDepartment.setText("");
         txtClass.setText("");
         txtTelephone.setText("");
         txtId.requestFocus();
     } else {
         JOptionPane.showMessageDialog(null, "添加记录失败了(╥ω╥`)！", "增加学生记录", JOptionPane.ERROR_MESSAGE);
     }
 }
```
  });
  
  // 【取消】按钮单击事件处理
  btnCancel.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  txtId.setText("");
  txtName.setText("");
  txtSex.setText("");
  txtAge.setText("");
  txtDepartment.setText("");
  txtClass.setText("");
  txtTelephone.setText("");
  txtId.requestFocus();
  }
  });
  
  // 【退出】按钮单击事件处理
  btnExit.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  dispose();
  }
  });
  
  // 【学号】文本框按键事件处理
  txtId.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  if (!txtId.getText().trim().equals("")) {
  txtName.requestFocus();
  }
  }
  }
  });
  
  // 【姓名】文本框按键事件处理
  txtName.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtSex.requestFocus();
  }
  }
  });
  
  // 【性别】文本框按键事件处理
  txtSex.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtAge.requestFocus();
  }
  }
  });
  
  // 【年龄】文本框按键事件处理
  txtAge.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtDepartment.requestFocus();
  }
  }
  });
  
  // 【系部】文本框按键事件处理
  txtDepartment.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtClass.requestFocus();
  }
  }
  });
  
  // 【班级】文本框按键事件处理
  txtClass.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtTelephone.requestFocus();
  }
  }
  });
  }
/**
- 判断一个字符串是否全是数字
- @param str
- @return
  */
  boolean isNumber(String str) {
  for (int i = 0; i < str.length(); i++) {
  if (str.charAt(i) < ‘0’ || str.charAt(i) > ‘9’) {
  return false;
  }
  }
  return true;
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  new AddStudentFrame("");
  }
  }

运行效果：

15、编辑学生记录界面
package net.wxf.student.gui;

import net.wxf.student.bean.Student;
import net.wxf.student.service.StudentService;
import net.wxf.student.service.impl.StudentServiceImpl;

import javax.swing.;
import java.awt.;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.List;

/**

功能：编辑学生记录
作者：吴旭芳
日期：2019年6月22日
/
public class EditStudentFrame extends JFrame {
/*
- 声明面板
  /
  private JPanel panel;
  private JPanel pnlCenter;
  private JPanel pnlRow1;
  private JPanel pnlRow2;
  private JPanel pnlRow3;
  private JPanel pnlRow4;
  private JPanel pnlRow5;
  private JPanel pnlRow6;
  private JPanel pnlRow7;
  private JPanel pnlSouth;
  private JPanel pnlSouth1;
  private JPanel pnlSouth2;
  /*
- 声明标签
  /
  private JLabel lblId;
  private JLabel lblName;
  private JLabel lblSex;
  private JLabel lblAge;
  private JLabel lblDepartment;
  private JLabel lblClass;
  private JLabel lblTelephone;
  /*
- 声明文本框
  /
  private JTextField txtId;
  private JTextField txtName;
  private JTextField txtSex;
  private JTextField txtAge;
  private JTextField txtDepartment;
  private JTextField txtClass;
  private JTextField txtTelephone;
  /*
- 声明按钮
  /
  private JButton btnTop;
  private JButton btnPrevious;
  private JButton btnNext;
  private JButton btnBottom;
  private JButton btnExit;
  private JButton btnEdit;
  private JButton btnOK;
  private JButton btnCancel;
  /*
- 当前记录行号
  /
  private int currentRow;
  /*
- 学生列表
  /
  private List students;
  /*
- 创建学生服务对象
  */
  StudentService studentService;
/**
- 构造方法
- @param title
  */
  public EditStudentFrame(String title) {
  super(title);
  initGUI();
  }
/**
- 初始化用户界面
  */
  private void initGUI() {
  // 创建组件
  panel = (JPanel) getContentPane();
  pnlCenter = new JPanel();
  pnlSouth = new JPanel();
  pnlSouth.setLayout(new GridLayout(2, 1));
  
  pnlRow1 = new JPanel();
  pnlRow2 = new JPanel();
  pnlRow3 = new JPanel();
  pnlRow4 = new JPanel();
  pnlRow5 = new JPanel();
  pnlRow6 = new JPanel();
  pnlRow7 = new JPanel();
  pnlSouth1 = new JPanel();
  pnlSouth2 = new JPanel();
  
  pnlRow1.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow2.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow3.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow4.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow5.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow6.setLayout(new FlowLayout(FlowLayout.LEFT));
  pnlRow7.setLayout(new FlowLayout(FlowLayout.LEFT));
  
  lblId = new JLabel(“学号：”);
  lblName = new JLabel(“姓名：”);
  lblSex = new JLabel(“性别：”);
  lblAge = new JLabel(“年龄：”);
  lblDepartment = new JLabel(“系部：”);
  lblClass = new JLabel(“班级：”);
  lblTelephone = new JLabel(“电话：”);
  
  txtId = new JTextField(40);
  txtName = new JTextField(40);
  txtSex = new JTextField(40);
  txtAge = new JTextField(40);
  txtDepartment = new JTextField(40);
  txtClass = new JTextField(40);
  txtTelephone = new JTextField(40);
  txtId.setEditable(false);
  txtName.setEditable(false);
  txtSex.setEditable(false);
  txtAge.setEditable(false);
  txtDepartment.setEditable(false);
  txtClass.setEditable(false);
  txtTelephone.setEditable(false);
  
  btnTop = new JButton(“第一条[T]”);
  btnPrevious = new JButton(“上一条[P]”);
  btnNext = new JButton(“下一条[N]”);
  btnBottom = new JButton(“最后一条[B]”);
  btnExit = new JButton(“退出[X]”);
  btnEdit = new JButton(“编辑[E]”);
  btnOK = new JButton(“确定[O]”);
  btnCancel = new JButton(“取消[C]”);
  btnOK.setEnabled(false);
  btnCancel.setEnabled(false);
  btnTop.setMnemonic(KeyEvent.VK_T);
  btnPrevious.setMnemonic(KeyEvent.VK_P);
  btnNext.setMnemonic(KeyEvent.VK_N);
  btnBottom.setMnemonic(KeyEvent.VK_B);
  btnExit.setMnemonic(KeyEvent.VK_X);
  btnEdit.setMnemonic(KeyEvent.VK_E);
  btnOK.setMnemonic(KeyEvent.VK_O);
  btnCancel.setMnemonic(KeyEvent.VK_C);
  
  // 添加组件
  panel.setLayout(new BorderLayout());
  panel.add(pnlCenter, BorderLayout.CENTER);
  panel.add(pnlSouth, BorderLayout.SOUTH);
  pnlCenter.setLayout(new GridLayout(7, 1));
  
  pnlCenter.add(pnlRow1);
  pnlCenter.add(pnlRow2);
  pnlCenter.add(pnlRow3);
  pnlCenter.add(pnlRow4);
  pnlCenter.add(pnlRow5);
  pnlCenter.add(pnlRow6);
  pnlCenter.add(pnlRow7);
  
  pnlRow1.add(lblId);
  pnlRow1.add(txtId);
  pnlRow2.add(lblName);
  pnlRow2.add(txtName);
  pnlRow3.add(lblSex);
  pnlRow3.add(txtSex);
  pnlRow4.add(lblAge);
  pnlRow4.add(txtAge);
  pnlRow5.add(lblDepartment);
  pnlRow5.add(txtDepartment);
  pnlRow6.add(lblClass);
  pnlRow6.add(txtClass);
  pnlRow7.add(lblTelephone);
  pnlRow7.add(txtTelephone);
  
  pnlSouth.add(pnlSouth1);
  pnlSouth.add(pnlSouth2);
  pnlSouth1.add(btnTop);
  pnlSouth1.add(btnPrevious);
  pnlSouth1.add(btnNext);
  pnlSouth1.add(btnBottom);
  pnlSouth1.add(btnExit);
  pnlSouth2.add(btnEdit);
  pnlSouth2.add(btnOK);
  pnlSouth2.add(btnCancel);
  
  // 设置窗口属性
  setSize(500, 300);
  // 设置窗口不可调整大小
  setResizable(false);
  // 设置窗口刚好容纳组件
  pack();
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  // 设置窗口可见
  setVisible(true);
  // 设置窗口默认关闭操作
  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  
  // 创建学生服务对象
  studentService = new StudentServiceImpl();
  // 获取全部学生列表
  students = studentService.findAllStudents();
  // 判断是否有学生记录
  if (students.size() > 0) {
  // 设置当前记录号
  currentRow = 1;
  // 设置窗口标题
  setTitle(“浏览学生表记录” + " && 当前记录：" + currentRow);
  // 填充窗口各文本框数据
  fillFrameData(currentRow);
  } else {
  JOptionPane.showMessageDialog(null, “表中没有记录！”, “浏览学生表记录”, JOptionPane.ERROR_MESSAGE);
  btnTop.setEnabled(false);
  btnPrevious.setEnabled(false);
  btnNext.setEnabled(false);
  btnBottom.setEnabled(false);
  }
  
  // 【第一条】按钮单击事件
  btnTop.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  // 设置当前记录号
  currentRow = 1;
  // 填充当前记录数据
  fillFrameData(currentRow);
  }
  });
  
  // 【上一条】按钮单击事件
  btnPrevious.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  if (currentRow > 1) {
  // 设置当前记录号
  currentRow–;
  // 填充当前记录数据
  fillFrameData(currentRow);
  } else {
  JOptionPane.showMessageDialog(null, “已到第一条记录_(:3」∠❀)_！”, “浏览学生表记录”, JOptionPane.WARNING_MESSAGE);
  }
  }
  });
  
  // 【下一条】按钮单击事件
  btnNext.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  if (currentRow < students.size() - 1) {
  // 设置当前记录号
  currentRow++;
  // 填充当前记录数据
  fillFrameData(currentRow);
  } else {
  JOptionPane.showMessageDialog(null, “已到最后一条记录_(:3」∠❀)_！”, “浏览学生表记录”, JOptionPane.WARNING_MESSAGE);
  }
  }
  });
  
  // 【最后一条】按钮单击事件
  btnBottom.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  // 设置当前记录号
  currentRow = students.size() - 1;
  // 填充当前记录数据
  fillFrameData(currentRow);
  }
  });
  
  // 【退出】按钮单击事件
  btnExit.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  dispose();
  }
  });
  
  // 【编辑】按钮单击事件
  btnEdit.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  // 设置窗口标题
  setTitle(“编辑学生表记录” + " && 当前记录：" + currentRow);
```
     txtName.setEditable(true);
     txtSex.setEditable(true);
     txtAge.setEditable(true);
     txtDepartment.setEditable(true);
     txtClass.setEditable(true);
     txtTelephone.setEditable(true);
     btnOK.setEnabled(true);
     btnCancel.setEnabled(true);
 }
```
  });
  
  // 【确定】按钮单击事件
  btnOK.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  // 获取当前学生实体
  Student student = students.get(currentRow);
```
     if (isNumber(txtAge.getText())) {
         if (isLegalTelephone(txtTelephone.getText())) {
             // 修改学生实体属性
             student.setName(txtName.getText());
             student.setSex(txtSex.getText());
             student.setAge(Integer.parseInt(txtAge.getText()));
             student.setDepartment(txtDepartment.getText());
             student.setClazz(txtClass.getText());
             student.setTelephone(txtTelephone.getText());
             // 更新学生信息
             int count = studentService.updateStudent(student);
             // 判断是否更新成功
             if (count > 0) {
                 JOptionPane.showMessageDialog(null, "更新记录成功٩( 'ω' )و！", "编辑学生记录", JOptionPane.INFORMATION_MESSAGE);
                 btnOK.setEnabled(false);
                 btnCancel.setEnabled(false);
                 btnEdit.setEnabled(true);
                 txtName.setEditable(false);
                 txtSex.setEditable(false);
                 txtAge.setEditable(false);
                 txtDepartment.setEditable(false);
                 txtClass.setEditable(false);
                 txtTelephone.setEditable(false);
                 // 重新获取全部学生列表
                 students = studentService.findAllStudents();
                 // 设置窗口标题
                 setTitle("浏览学生表记录" + " && 当前记录：" + currentRow);
             } else {
                 JOptionPane.showMessageDialog(null, "更新记录失败Σ(っ °Д °;)っ！", "编辑学生记录", JOptionPane.ERROR_MESSAGE);
             }
         } else {
             JOptionPane.showMessageDialog(null, "非法手机号Σ(っ °Д °;)っ！", "编辑学生记录", JOptionPane.ERROR_MESSAGE);
             txtTelephone.selectAll();
             txtTelephone.requestFocus();
         }
     } else {
         JOptionPane.showMessageDialog(null, "年龄必须是数字_(:з」∠)_！", "编辑学生记录", JOptionPane.ERROR_MESSAGE);
         txtAge.selectAll();
         txtAge.requestFocus();
     }
 }
```
  });
  
  // 【取消】按钮单击事件
  btnCancel.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  btnOK.setEnabled(false);
  btnCancel.setEnabled(false);
  btnEdit.setEnabled(true);
  txtName.setEditable(false);
  txtSex.setEditable(false);
  txtAge.setEditable(false);
  txtDepartment.setEditable(false);
  txtClass.setEditable(false);
  txtTelephone.setEditable(false);
  // 恢复文本框修改前的值
  txtName.setText(students.get(currentRow).getName());
  txtSex.setText(students.get(currentRow).getSex());
  txtAge.setText(students.get(currentRow).getAge() + “”);
  txtDepartment.setText(students.get(currentRow).getDepartment());
  txtClass.setText(students.get(currentRow).getClazz());
  txtTelephone.setText(students.get(currentRow).getTelephone());
  }
  });
  
  // 【学号】文本框按键事件
  txtId.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtName.requestFocus();
  }
  }
  });
  
  // 【姓名】文本框按键事件
  txtName.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtSex.requestFocus();
  }
  }
  });
  
  // 【性别】文本框按键事件
  txtSex.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtAge.requestFocus();
  }
  }
  });
  
  // 【年龄】文本框按键事件
  txtAge.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtDepartment.requestFocus();
  }
  }
  });
  
  // 【系部】文本框按键事件
  txtDepartment.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtClass.requestFocus();
  }
  }
  });
  
  // 【班级】文本框按键事件
  txtClass.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  txtTelephone.requestFocus();
  }
  }
  });
  }
/**
- 将当前记录数据填充窗口各文本框
- @param currentRow
  */
  private void fillFrameData(int currentRow) {
  if (currentRow > 0) {
  setTitle(“浏览学生表记录” + " && 当前记录：" + currentRow);
  txtId.setText(students.get(currentRow).getId());
  txtName.setText(students.get(currentRow).getName());
  txtSex.setText(students.get(currentRow).getSex());
  txtAge.setText(students.get(currentRow).getAge() + “”);
  txtDepartment.setText(students.get(currentRow).getDepartment());
  txtClass.setText(students.get(currentRow).getClazz());
  txtTelephone.setText(students.get(currentRow).getTelephone());
  }
  }
// 判断一个字符串是否全是数字
private boolean isNumber(String str) {
for (int i = 0; i < str.length(); i++) {
if (str.charAt(i) < ‘0’ || str.charAt(i) > ‘9’) {
return false;
}
}
return true;
}

/**
- 判断是否合法手机号
- @param telephone
- @return
  */
  private boolean isLegalTelephone(String telephone) {
  Pattern p = Pattern.compile("^{((13[0-9])|(15[}4,\D])|(18[0-9]))\d{8}$");
  Matcher m = p.matcher(telephone);
  return m.matches();
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  new EditStudentFrame("");
  }
  }
  效果如下：

16、分别按学号、班级、系部、姓名完成查找
（1）按学号
package net.wxf.student.gui;

import net.wxf.student.bean.Student;
import net.wxf.student.service.StudentService;
import net.wxf.student.service.impl.StudentServiceImpl;

import javax.swing.;
import javax.swing.border.TitledBorder;
import java.awt.;
import java.awt.event.*;
import java.awt.print.PrinterException;
import java.util.Vector;
import java.util.List;

/**

功能：按学号查询学生记录
作者：吴旭芳
日期：2019年6月23日
/
public class FindStudentByIdFrame extends JFrame {
/*
- 学号标签
  /
  private JLabel lblInputId;
  /*
- 学号文本框
  /
  private JTextField txtId;
  /*
- 面板
  /
  private JPanel panel;
  private JPanel pnlSouth;
  private JPanel pnlCenter;
  private JPanel pnlNorth;
  /*
- 按钮
  /
  private JButton btnQuery;
  private JButton btnBrowseAll;
  private JButton btnPrint;
  private JButton btnExit;
  /*
- 记录行集
  /
  private Vector rows;
  /*
- 表格列标题
  /
  private Vector colHead;
  /*
- 表格
  /
  private JTable table;
  /*
- 滚动面板
  /
  private JScrollPane scroller;
  /*
- 当前记录行号
  /
  private int currentRow;
  /*
- 学生列表
  /
  private List students;
  /*
- 创建学生服务对象
  */
  private StudentService studentService;
/**
- 构造方法
- @param title
  */
  public FindStudentByIdFrame(String title) {
  super(title);
  intiGUI();
  }
/**
- 初始化用户界面
  */
  private void intiGUI() {
  // 创建组件
  panel = (JPanel) getContentPane();
  pnlNorth = new JPanel();
  pnlCenter = new JPanel();
  pnlSouth = new JPanel();
  
  rows = new Vector();
  colHead = new Vector();
  
  lblInputId = new JLabel(“输入学号：”);
  txtId = new JTextField(10);
  txtId.setHorizontalAlignment(JTextField.CENTER);
  btnQuery = new JButton(“查询[Q]”);
  btnQuery.setMnemonic(KeyEvent.VK_Q);
  btnBrowseAll = new JButton(“显示全部记录[A]”);
  btnBrowseAll.setMnemonic(KeyEvent.VK_A);
  btnPrint = new JButton(“打印[P]”);
  btnPrint.setMnemonic(KeyEvent.VK_D);
  btnExit = new JButton(“退出[X]”);
  btnExit.setMnemonic(KeyEvent.VK_X);
  
  // 添加组件
  panel.add(pnlSouth, BorderLayout.SOUTH);
  panel.add(pnlCenter, BorderLayout.CENTER);
  panel.add(pnlNorth, BorderLayout.NORTH);
  
  pnlNorth.add(lblInputId);
  pnlNorth.add(txtId);
  pnlNorth.add(btnQuery);
  pnlNorth.add(btnBrowseAll);
  pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
  pnlSouth.add(btnPrint);
  pnlSouth.add(btnExit);
  pnlCenter.setLayout(new BorderLayout());
  
  // 创建标题边框对象
  TitledBorder tb = new TitledBorder(“查询结果”);
  pnlCenter.setBorder(tb);
  
  // 创建学生服务对象
  studentService = new StudentServiceImpl();
  // 获取全部学生列表
  students = studentService.findAllStudents();
  // 填充表格数据
  fillTableData();
  
  // 设置窗口大小
  setSize(600, 350);
  // 设置窗口不可调整大小
  setResizable(false);
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  // 设置窗口标题
  setTitle(“按学号查询学生记录”);
  // 设置窗口可见
  setVisible(true);
  // 设置窗口默认关闭操作
  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  
  // 【退出】按钮单击事件
  btnExit.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent event) {
  dispose();
  }
  });
  
  // 【打印】按钮单击事件
  btnPrint.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  try {
  table.print();
  } catch (PrinterException e1) {
  e1.printStackTrace();
  }
  }
  });
  
  // 【查询】按钮单击事件
  btnQuery.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent event) {
  doQuery();
  }
  });
  
  // 【显示全部记录】按钮单击事件
  btnBrowseAll.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent event) {
  // 获取全部学生记录
  students = studentService.findAllStudents();
  // 填充表格数据
  fillTableData();
  // 删除按钮不可用
  btnPrint.setEnabled(false);
  }
  });
  
  // 【学号】文本框按键事件
  txtId.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  doQuery();
  }
  }
  });
  
  // 表格单击事件
  table.addMouseListener(new MouseAdapter() {
  public void mouseClicked(MouseEvent e) {
  // 获取当前行的行数
  int row = table.rowAtPoint(e.getPoint());
  // 选中鼠标单击的行
  table.setRowSelectionInterval(row, row);
  // 设置文本框内容
  txtId.setText(table.getValueAt(row, 0).toString());
  }
  });
  }
/**
- 查询方法
  */
  private void doQuery() {
  // 获取查询学号
  String id = txtId.getText().trim();
  if (!id.equals("")) {
  students.clear();
  Student student = studentService.findStudentById(id);
  if (student != null) {
  // 将查询到的学生添加到列表
  students.add(student);
  }
  // 填充表格
  fillTableData();
  } else {
  JOptionPane.showMessageDialog(this, “请输入待查学生学号！”, “警告”, JOptionPane.WARNING_MESSAGE);
  txtId.requestFocus();
  }
  }
/**
- 填充表格方法
  */
  private void fillTableData() {
  // 填充表头
  colHead.clear();
  colHead.add(“学号”);
  colHead.add(“姓名”);
  colHead.add(“性别”);
  colHead.add(“年龄”);
  colHead.add(“系部”);
  colHead.add(“班级”);
  colHead.add(“电话”);
  
  // 填充表记录
  rows.clear();
  for (Student student : students) {
  Vector currentRow = new Vector();
  currentRow.addElement(student.getId());
  currentRow.addElement(student.getName());
  currentRow.addElement(student.getSex());
  currentRow.addElement(student.getAge() + “”);
  currentRow.addElement(student.getDepartment());
  currentRow.addElement(student.getClazz());
  currentRow.addElement(student.getTelephone());
  // 将当前行添加到记录行集
  rows.add(currentRow);
  }
  // 创建表格（参数1：记录集；参数2：表头）
  table = new JTable(rows, colHead);
  
  // 定义滚动面板
  scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
  JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
  // 将滚动面板添加到中心面板
  pnlCenter.add(scroller, BorderLayout.CENTER);
  
  // 重绘窗体
  repaint();
  
  // 判断是否有记录行
  if (rows.isEmpty()) {
  JOptionPane.showMessageDialog(this, “没有符合条件的记录Σ(っ °Д °;)っ！”, “错误提示”, JOptionPane.WARNING_MESSAGE);
  txtId.setText("");
  } else {
  // 让滚动条移到最上方
  scroller.getVerticalScrollBar().setValue(0);
  }
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  new FindStudentByIdFrame("");
  }
  }

运行效果如下：

（2）按班级
package net.wxf.student.gui;

import net.wxf.student.bean.Student;
import net.wxf.student.service.StudentService;
import net.wxf.student.service.impl.StudentServiceImpl;

import javax.swing.;
import javax.swing.border.TitledBorder;
import java.awt.;
import java.awt.event.*;
import java.awt.print.PrinterException;
import java.util.Vector;
import java.util.List;

/**

功能：按班级查询学生记录
作者：吴旭芳
日期：2019年6月23日
/
public class FindStudentsByClassFrame extends JFrame {
/*
- 班级标签
  /
  private JLabel lblInputClass;
  /*
- 班级文本框
  /
  private JTextField txtClass;
  /*
- 面板
  /
  private JPanel panel;
  private JPanel pnlSouth;
  private JPanel pnlCenter;
  private JPanel pnlNorth;
  /*
- 按钮
  /
  private JButton btnQuery;
  private JButton btnBrowseAll;
  private JButton btnPrint;
  private JButton btnExit;
  /*
- 记录行集
  /
  private Vector rows;
  /*
- 表格列标题
  /
  private Vector colHead;
  /*
- 表格
  /
  private JTable table;
  /*
- 滚动面板
  */
  private JScrollPane scroller;
/**
- 当前记录行号
  /
  private int currentRow;
  /*
- 学生列表
  /
  private List students;
  /*
- 创建学生服务对象
  */
  private StudentService studentService;
/**
- 构造方法
- @param title
  */
  public FindStudentsByClassFrame(String title) {
  super(title);
  intiGUI();
  }
/**
- 初始化用户界面
  */
  private void intiGUI() {
  // 创建组件
  panel = (JPanel) getContentPane();
  pnlNorth = new JPanel();
  pnlCenter = new JPanel();
  pnlSouth = new JPanel();
  
  rows = new Vector();
  colHead = new Vector();
  
  lblInputClass = new JLabel(“输入班级：”);
  txtClass = new JTextField(10);
  txtClass.setHorizontalAlignment(JTextField.CENTER);
  btnQuery = new JButton(“查询[Q]”);
  btnQuery.setMnemonic(KeyEvent.VK_Q);
  btnBrowseAll = new JButton(“显示全部记录[A]”);
  btnBrowseAll.setMnemonic(KeyEvent.VK_A);
  btnPrint = new JButton(“打印[P]”);
  btnPrint.setMnemonic(KeyEvent.VK_D);
  btnExit = new JButton(“退出[X]”);
  btnExit.setMnemonic(KeyEvent.VK_X);
  
  // 添加组件
  panel.add(pnlSouth, BorderLayout.SOUTH);
  panel.add(pnlCenter, BorderLayout.CENTER);
  panel.add(pnlNorth, BorderLayout.NORTH);
  
  pnlNorth.add(lblInputClass);
  pnlNorth.add(txtClass);
  pnlNorth.add(btnQuery);
  pnlNorth.add(btnBrowseAll);
  pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
  pnlSouth.add(btnPrint);
  pnlSouth.add(btnExit);
  pnlCenter.setLayout(new BorderLayout());
  
  // 创建标题边框对象
  TitledBorder tb = new TitledBorder(“查询结果”);
  pnlCenter.setBorder(tb);
  
  // 创建学生服务对象
  studentService = new StudentServiceImpl();
  // 获取全部学生列表
  students = studentService.findAllStudents();
  // 填充表格数据
  fillTableData();
  
  // 设置窗口大小
  setSize(600, 350);
  // 设置窗口不可调整大小
  setResizable(false);
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  // 设置窗口标题
  setTitle(“按姓名查询学生记录”);
  // 设置窗口可见
  setVisible(true);
  // 设置窗口默认关闭操作
  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  
  // 【退出】按钮单击事件
  btnExit.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent event) {
  dispose();
  }
  });
  
  // 【打印】按钮单击事件
  btnPrint.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  try {
  table.print();
  } catch (PrinterException e1) {
  e1.printStackTrace();
  }
  }
  });
  
  // 【查询】按钮单击事件
  btnQuery.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent event) {
  doQuery();
  }
  });
  
  // 【显示全部记录】按钮单击事件
  btnBrowseAll.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent event) {
  // 获取全部学生记录
  students = studentService.findAllStudents();
  // 填充表格数据
  fillTableData();
  }
  });
  
  // 【班级】文本框按键事件
  txtClass.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  doQuery();
  }
  }
  });
  
  // 表格单击事件
  table.addMouseListener(new MouseAdapter() {
  public void mouseClicked(MouseEvent e) {
  // 获取当前行的行数
  int row = table.rowAtPoint(e.getPoint());
  // 选中鼠标单击的行
  table.setRowSelectionInterval(row, row);
  // 设置文本框内容
  txtClass.setText(table.getValueAt(row, 5).toString());
  }
  });
  }
/**
- 查询方法
  */
  private void doQuery() {
  // 获取查询班级
  String clazz = txtClass.getText().trim();
  if (!clazz.equals("")) {
  // 按班级查询获取学生列表
  students = studentService.findStudentsByClass(clazz);
  // 填充表格
  fillTableData();
  } else {
  JOptionPane.showMessageDialog(this, “请输入待查班级！”, “警告”, JOptionPane.WARNING_MESSAGE);
  txtClass.requestFocus();
  }
  }
/**
- 填充表格方法
  */
  private void fillTableData() {
  // 填充表头
  colHead.clear();
  colHead.add(“班级”);
  colHead.add(“班级”);
  colHead.add(“性别”);
  colHead.add(“年龄”);
  colHead.add(“系部”);
  colHead.add(“班级”);
  colHead.add(“电话”);
  
  // 填充表记录
  rows.clear();
  for (Student student : students) {
  Vector currentRow = new Vector();
  currentRow.addElement(student.getId());
  currentRow.addElement(student.getName());
  currentRow.addElement(student.getSex());
  currentRow.addElement(student.getAge() + “”);
  currentRow.addElement(student.getDepartment());
  currentRow.addElement(student.getClazz());
  currentRow.addElement(student.getTelephone());
  // 将当前行添加到记录行集
  rows.add(currentRow);
  }
  
  // 创建表格（参数1：记录集；参数2：表头）
  table = new JTable(rows, colHead);
  
  // 定义滚动面板
  scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
  JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
  // 将滚动面板添加到中心面板
  pnlCenter.add(scroller, BorderLayout.CENTER);
  
  // 重绘窗体
  repaint();
  
  // 判断是否有记录行
  if (rows.isEmpty()) {
  JOptionPane.showMessageDialog(this, “没有符合条件的记录Σ(っ °Д °;)っ！”, “错误提示”, JOptionPane.WARNING_MESSAGE);
  txtClass.setText("");
  } else {
  // 让滚动条移到最上方
  scroller.getVerticalScrollBar().setValue(0);
  }
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  new FindStudentsByClassFrame("");
  }
  }

运行效果如下：

（3）按系部
package net.wxf.student.gui;

import net.wxf.student.bean.Student;
import net.wxf.student.service.StudentService;
import net.wxf.student.service.impl.StudentServiceImpl;

import javax.swing.;
import javax.swing.border.TitledBorder;
import java.awt.;
import java.awt.event.*;
import java.awt.print.PrinterException;
import java.util.Vector;
import java.util.List;

/**

功能：按系部查询学生记录
作者：吴旭芳
日期：2019年6月23日
/
public class FindStudentsByDepartmentFrame extends JFrame {
/*
- 系部标签
  /
  private JLabel lblInputDepartment;
  /*
- 系部文本框
  /
  private JTextField txtDepartment;
  /*
- 面板
  /
  private JPanel panel;
  private JPanel pnlSouth;
  private JPanel pnlCenter;
  private JPanel pnlNorth;
  /*
- 按钮
  /
  private JButton btnQuery;
  private JButton btnBrowseAll;
  private JButton btnPrint;
  private JButton btnExit;
  /*
- 记录行集
  /
  private Vector rows;
  /*
- 表格列标题
  /
  private Vector colHead;
  /*
- 表格
  /
  private JTable table;
  /*
- 滚动面板
  */
  private JScrollPane scroller;
/**
- 当前记录行号
  /
  private int currentRow;
  /*
- 学生列表
  /
  private List students;
  /*
- 创建学生服务对象
  */
  private StudentService studentService;
/**
- 构造方法
- @param title
  */
  public FindStudentsByDepartmentFrame(String title) {
  super(title);
  intiGUI();
  }
/**
- 初始化用户界面
  */
  private void intiGUI() {
  // 创建组件
  panel = (JPanel) getContentPane();
  pnlNorth = new JPanel();
  pnlCenter = new JPanel();
  pnlSouth = new JPanel();
  
  rows = new Vector();
  colHead = new Vector();
  
  lblInputDepartment = new JLabel(“输入系部：”);
  txtDepartment = new JTextField(10);
  txtDepartment.setHorizontalAlignment(JTextField.CENTER);
  btnQuery = new JButton(“查询[Q]”);
  btnQuery.setMnemonic(KeyEvent.VK_Q);
  btnBrowseAll = new JButton(“显示全部记录[A]”);
  btnBrowseAll.setMnemonic(KeyEvent.VK_A);
  btnPrint = new JButton(“打印[P]”);
  btnPrint.setMnemonic(KeyEvent.VK_D);
  btnExit = new JButton(“退出[X]”);
  btnExit.setMnemonic(KeyEvent.VK_X);
  
  // 添加组件
  panel.add(pnlSouth, BorderLayout.SOUTH);
  panel.add(pnlCenter, BorderLayout.CENTER);
  panel.add(pnlNorth, BorderLayout.NORTH);
  
  pnlNorth.add(lblInputDepartment);
  pnlNorth.add(txtDepartment);
  pnlNorth.add(btnQuery);
  pnlNorth.add(btnBrowseAll);
  pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
  pnlSouth.add(btnPrint);
  pnlSouth.add(btnExit);
  pnlCenter.setLayout(new BorderLayout());
  
  // 创建标题边框对象
  TitledBorder tb = new TitledBorder(“查询结果”);
  pnlCenter.setBorder(tb);
  
  // 创建学生服务对象
  studentService = new StudentServiceImpl();
  // 获取全部学生列表
  students = studentService.findAllStudents();
  // 填充表格数据
  fillTableData();
  
  // 设置窗口大小
  setSize(600, 350);
  // 设置窗口不可调整大小
  setResizable(false);
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  // 设置窗口标题
  setTitle(“按系部查询学生记录”);
  // 设置窗口可见
  setVisible(true);
  // 设置窗口默认关闭操作
  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  
  // 【退出】按钮单击事件
  btnExit.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent event) {
  dispose();
  }
  });
  
  // 【打印】按钮单击事件
  btnPrint.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  try {
  table.print();
  } catch (PrinterException e1) {
  e1.printStackTrace();
  }
  }
  });
  
  // 【查询】按钮单击事件
  btnQuery.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent event) {
  doQuery();
  }
  });
  
  // 【显示全部记录】按钮单击事件
  btnBrowseAll.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent event) {
  // 获取全部学生记录
  students = studentService.findAllStudents();
  // 填充表格数据
  fillTableData();
  }
  });
  
  // 【系部】文本框按键事件
  txtDepartment.addKeyListener(new KeyAdapter() {
  @Override
  public void keyPressed(KeyEvent e) {
  if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  doQuery();
  }
  }
  });
  
  // 表格单击事件
  table.addMouseListener(new MouseAdapter() {
  public void mouseClicked(MouseEvent e) {
  // 获取当前行的行数
  int row = table.rowAtPoint(e.getPoint());
  // 选中鼠标单击的行
  table.setRowSelectionInterval(row, row);
  // 设置文本框内容
  txtDepartment.setText(table.getValueAt(row, 5).toString());
  }
  });
  }
/**
- 查询方法
  */
  private void doQuery() {
  // 获取查询系部
  String department = txtDepartment.getText().trim();
  if (!department.equals("")) {
  // 按系部查询获取学生列表
  students = studentService.findStudentsByDepartment(department);
  // 填充表格
  fillTableData();
  } else {
  JOptionPane.showMessageDialog(this, “请输入待查系部！”, “警告”, JOptionPane.WARNING_MESSAGE);
  txtDepartment.requestFocus();
  }
  }
/**
- 填充表格方法
  */
  private void fillTableData() {
  // 填充表头
  colHead.clear();
  colHead.add(“系部”);
  colHead.add(“系部”);
  colHead.add(“性别”);
  colHead.add(“年龄”);
  colHead.add(“系部”);
  colHead.add(“系部”);
  colHead.add(“电话”);
  
  // 填充表记录
  rows.clear();
  for (Student student : students) {
  Vector currentRow = new Vector();
  currentRow.addElement(student.getId());
  currentRow.addElement(student.getName());
  currentRow.addElement(student.getSex());
  currentRow.addElement(student.getAge() + “”);
  currentRow.addElement(student.getDepartment());
  currentRow.addElement(student.getClazz());
  currentRow.addElement(student.getTelephone());
  // 将当前行添加到记录行集
  rows.add(currentRow);
  }
  
  // 创建表格（参数1：记录集；参数2：表头）
  table = new JTable(rows, colHead);
  
  // 定义滚动面板
  scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
  JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
  // 将滚动面板添加到中心面板
  pnlCenter.add(scroller, BorderLayout.CENTER);
  
  // 重绘窗体
  repaint();
  
  // 判断是否有记录行
  if (rows.isEmpty()) {
  JOptionPane.showMessageDialog(this, “没有符合条件的记录Σ(っ °Д °;)っ！”, “错误提示”, JOptionPane.WARNING_MESSAGE);
  txtDepartment.setText("");
  } else {
  // 让滚动条移到最上方
  scroller.getVerticalScrollBar().setValue(0);
  }
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  new FindStudentsByDepartmentFrame("");
  }
  }

效果如下：

（4）按姓名
package net.wxf.student.gui;

import net.wxf.student.bean.Student;
import net.wxf.student.service.StudentService;
import net.wxf.student.service.impl.StudentServiceImpl;
/**

功能：按姓名查询学生信息
作者：吴旭芳
日期：2019年6月23
/
import javax.swing.;
import javax.swing.border.TitledBorder;
import java.awt.;
import java.awt.event.;
import java.awt.print.PrinterException;
import java.util.Vector;
import java.util.List;

public class FindStudentsByNameFrame extends JFrame {
/**
* 姓名标签
/
private JLabel lblInputName;
/*
* 姓名文本框
*/
private JTextField txtName;

/**
 * 面板
 */
private JPanel panel;
private JPanel pnlSouth;
private JPanel pnlCenter;
private JPanel pnlNorth;

/**
 * 按钮
 */
private JButton btnQuery;
private JButton btnBrowseAll;
private JButton btnPrint;
private JButton btnExit;

/**
 * 记录行集
 */
private Vector rows;
/**
 * 表格列标题
 */
private Vector colHead;
/**
 * 表格
 */
private JTable table;
/**
 * 滚动面板
 */
private JScrollPane scroller;

/**
 * 当前记录行号
 */
private int currentRow;
/**
 * 学生列表
 */
private List students;
/**
 * 创建学生服务对象
 */
private StudentService studentService;

/**
 * 构造方法
 *
 * @param title
 */
public FindStudentsByNameFrame(String title) {
    super(title);
    intiGUI();
}

/**
 * 初始化用户界面
 */
private void intiGUI() {
    // 创建对象
    panel = (JPanel) getContentPane();
    pnlNorth = new JPanel();
    pnlCenter = new JPanel();
    pnlSouth = new JPanel();

    rows = new Vector();
    colHead = new Vector();

    lblInputName = new JLabel("输入姓名：");
    txtName = new JTextField(10);
    txtName.setHorizontalAlignment(JTextField.CENTER);
    btnQuery = new JButton("查询[Q]");
    btnQuery.setMnemonic(KeyEvent.VK_Q);
    btnBrowseAll = new JButton("显示全部记录[A]");
    btnBrowseAll.setMnemonic(KeyEvent.VK_A);
    btnPrint = new JButton("打印[P]");
    btnPrint.setMnemonic(KeyEvent.VK_D);
    btnExit = new JButton("退出[X]");
    btnExit.setMnemonic(KeyEvent.VK_X);

    // 添加组件
    panel.add(pnlSouth, BorderLayout.SOUTH);
    panel.add(pnlCenter, BorderLayout.CENTER);
    panel.add(pnlNorth, BorderLayout.NORTH);

    pnlNorth.add(lblInputName);
    pnlNorth.add(txtName);
    pnlNorth.add(btnQuery);
    pnlNorth.add(btnBrowseAll);
    pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
    pnlSouth.add(btnPrint);
    pnlSouth.add(btnExit);
    pnlCenter.setLayout(new BorderLayout());

    // 创建标题边框对象
    TitledBorder tb = new TitledBorder("查询结果");
    pnlCenter.setBorder(tb);

    // 创建学生服务对象
    studentService = new StudentServiceImpl();
    // 获取全部学生列表
    students = studentService.findAllStudents();
    // 填充表格数据
    fillTableData();

    // 设置窗口大小
    setSize(600, 350);
    // 设置窗口不可调整大小
    setResizable(false);
    // 设置窗口屏幕居中
    setLocationRelativeTo(null);
    // 设置窗口标题
    setTitle("按姓名查询学生记录");
    // 设置窗口可见
    setVisible(true);
    // 设置窗口默认关闭操作
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    // 【退出】按钮单击事件
    btnExit.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent event) {
            dispose();
        }
    });

    // 【打印】按钮单击事件
    btnPrint.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            try {
                table.print();
            } catch (PrinterException e1) {
                e1.printStackTrace();
            }
        }
    });

    // 【查询】按钮单击事件
    btnQuery.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent event) {
            doQuery();
        }
    });

    // 【显示全部记录】按钮单击事件
    btnBrowseAll.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent event) {
            // 获取全部学生记录
            students = studentService.findAllStudents();
            // 填充表格数据
            fillTableData();
        }
    });

    // 【姓名】文本框按键事件
    txtName.addKeyListener(new KeyAdapter() {
        @Override
        public void keyPressed(KeyEvent e) {
            if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                doQuery();
            }
        }
    });

    // 表格单击事件
    table.addMouseListener(new MouseAdapter() {
        public void mouseClicked(MouseEvent e) {
            // 获取当前行的行数
            int row = table.rowAtPoint(e.getPoint());
            // 选中鼠标单击的行
            table.setRowSelectionInterval(row, row);
            // 设置文本框内容
            txtName.setText(table.getValueAt(row, 1).toString());
        }
    });
}

/**
 * 查询方法
 */
private void doQuery() {
    // 获取查询姓名
    String name = txtName.getText().trim();
    if (!name.equals("")) {
        // 按姓名查询获取学生列表
        students = studentService.findStudentsByName(name);
        // 填充表格
        fillTableData();
    } else {
        JOptionPane.showMessageDialog(this, "请输入待查学生姓名！", "警告", JOptionPane.WARNING_MESSAGE);
        txtName.requestFocus();
    }
}

/**
 * 填充表格方法
 */
private void fillTableData() {
    // 填充表头
    colHead.clear();
    colHead.add("姓名");
    colHead.add("姓名");
    colHead.add("性别");
    colHead.add("年龄");
    colHead.add("系部");
    colHead.add("班级");
    colHead.add("电话");

    // 填充表记录
    rows.clear();
    for (Student student : students) {
        Vector currentRow = new Vector();
        currentRow.addElement(student.getId());
        currentRow.addElement(student.getName());
        currentRow.addElement(student.getSex());
        currentRow.addElement(student.getAge() + "");
        currentRow.addElement(student.getDepartment());
        currentRow.addElement(student.getClazz());
        currentRow.addElement(student.getTelephone());
        // 将当前行添加到记录行集
        rows.add(currentRow);
    }

    // 创建表格（参数1：记录集；参数2：表头）
    table = new JTable(rows, colHead);

    // 定义滚动面板
    scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
            JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
    // 将滚动面板添加到中心面板
    pnlCenter.add(scroller, BorderLayout.CENTER);

    // 重绘窗体
    repaint();

    // 判断是否有记录行
    if (rows.isEmpty()) {
        JOptionPane.showMessageDialog(this, "没有符合条件的记录Σ(っ °Д °;)っ！", "错误提示", JOptionPane.WARNING_MESSAGE);
        txtName.setText("");
    } else {
        // 让滚动条移到最上方
        scroller.getVerticalScrollBar().setValue(0);
    }
}

/**
 * 主方法
 *
 * @param args
 */
public static void main(String[] args) {
    new FindStudentsByNameFrame("");
}

}

效果如下：

17、删除功能界面化：
（1）按学号：
package net.wxf.student.gui;

import net.wxf.student.bean.Student;
import net.wxf.student.service.StudentService;
import net.wxf.student.service.impl.StudentServiceImpl;

import javax.swing.;
import javax.swing.border.TitledBorder;
import java.awt.;
import java.awt.event.*;
import java.util.Vector;
import java.util.List;

/**

功能：按学号删除学生记录
作者：吴旭芳

日期：2019年6月23日
/
public class DeleteStudentByIdFrame extends JFrame {
/*

学号标签
/
private JLabel lblInputId;
/*
学号文本框
/
private JTextField txtId;
/*
面板
*/
private JPanel panel;
private JPanel pnlSouth;
private JPanel pnlCenter;
private JPanel pnlNorth;

/**

按钮
/
private JButton btnQuery;
private JButton btnBrowseAll;
private JButton btnDelete;
private JButton btnExit;
/*
记录行集
/
private Vector rows;
/*
表格列标题
/
private Vector colHead;
/*
表格
/
private JTable table;
/*
滚动面板
/
private JScrollPane scroller;
/*
当前记录行号
/
private int currentRow;
/*
学生列表
/
private List students;
/*
创建学生服务对象
*/
private StudentService studentService;

/**

构造方法
@param title
*/
public DeleteStudentByIdFrame(String title) {
super(title);
intiGUI();
}

private void intiGUI() {
// 创建组件
panel = (JPanel) getContentPane();
pnlNorth = new JPanel();
pnlCenter = new JPanel();
pnlSouth = new JPanel();

 rows = new Vector();
 colHead = new Vector();

 lblInputId = new JLabel("输入学号：");
 txtId = new JTextField(10);
 txtId.setHorizontalAlignment(JTextField.CENTER);
 btnQuery = new JButton("查询[Q]");
 btnQuery.setMnemonic(KeyEvent.VK_Q);
 btnBrowseAll = new JButton("显示全部记录[A]");
 btnBrowseAll.setMnemonic(KeyEvent.VK_A);
 btnDelete = new JButton("删除查询的记录[D]");
 btnDelete.setEnabled(false);// 删除按钮不可用
 btnDelete.setMnemonic(KeyEvent.VK_D);
 btnExit = new JButton("退出[X]");
 btnExit.setMnemonic(KeyEvent.VK_X);

 // 添加组件
 panel.add(pnlSouth, BorderLayout.SOUTH);
 panel.add(pnlCenter, BorderLayout.CENTER);
 panel.add(pnlNorth, BorderLayout.NORTH);

 pnlNorth.add(lblInputId);
 pnlNorth.add(txtId);
 pnlNorth.add(btnQuery);
 pnlNorth.add(btnBrowseAll);
 pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
 pnlSouth.add(btnDelete);
 pnlSouth.add(btnExit);
 pnlCenter.setLayout(new BorderLayout());

 // 创建标题边框对象
 TitledBorder tb = new TitledBorder("查询结果");
 pnlCenter.setBorder(tb);

 // 创建学生服务对象
 studentService = new StudentServiceImpl();
 // 获取全部学生列表
 students = studentService.findAllStudents();
 // 填充表格数据
 fillTableData();

 // 设置窗口大小
 setSize(600, 350);
 // 设置窗口不可调整大小
 setResizable(false);
 // 设置窗口屏幕居中
 setLocationRelativeTo(null);
 // 设置窗口标题
 setTitle("按学号删除学生记录");
 // 设置窗口可见
 setVisible(true);
 // 设置窗口默认关闭操作
 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

 // 【退出】按钮单击事件
 btnExit.addActionListener(new ActionListener() {
     @Override
     public void actionPerformed(ActionEvent event) {
         dispose();
     }
 });

 // 【删除】按钮单击事件
 btnDelete.addActionListener(new ActionListener() {
     @Override
     public void actionPerformed(ActionEvent e) {
         if (!rows.isEmpty()) {
             long choice = JOptionPane.showConfirmDialog(null, "是否要删除记录_(:3」∠❀)_？");
             if (choice == JOptionPane.OK_OPTION) {
                 // 获取待删学生学号
                 String id = txtId.getText().trim();
                 // 按学号删除学生
                 int count = studentService.deleteStudentById(id);
                 if (count > 0) {
                     JOptionPane.showMessageDialog(null, "记录删除成功٩( 'ω' )و！", "提示", JOptionPane.INFORMATION_MESSAGE);
                     // 重新获取全部学生列表
                     students = studentService.findAllStudents();
                     // 清空待删学生学号文本框
                     txtId.setText("");
                     // 填充数据
                     fillTableData();
                     // 删除按钮不可用
                     btnDelete.setEnabled(false);
                 } else {
                     JOptionPane.showMessageDialog(null, "记录删除失败Σ(っ °Д °;)っ！", "警告", JOptionPane.WARNING_MESSAGE);
                 }
             }
         }
     }
 });

 // 【查询】按钮单击事件
 btnQuery.addActionListener(new ActionListener() {
     @Override
     public void actionPerformed(ActionEvent event) {
         doQuery();
     }
 });

 // 【显示全部记录】按钮单击事件
 btnBrowseAll.addActionListener(new ActionListener() {
     @Override
     public void actionPerformed(ActionEvent event) {
         // 获取全部学生记录
         students = studentService.findAllStudents();
         // 填充表格数据
         fillTableData();
         // 删除按钮不可用
         btnDelete.setEnabled(false);
     }
 });

 // 【学号】文本框按键事件
 txtId.addKeyListener(new KeyAdapter() {
     @Override
     public void keyPressed(KeyEvent e) {
         if (e.getKeyCode() == KeyEvent.VK_ENTER) {
             doQuery();
         }
     }
 });

 // 表格单击事件
 table.addMouseListener(new MouseAdapter() {
     public void mouseClicked(MouseEvent e) {
         // 获取当前行的行数
         int row = table.rowAtPoint(e.getPoint());
         // 选中鼠标单击的行
         table.setRowSelectionInterval(row, row);
         // 设置文本框内容
         txtId.setText(table.getValueAt(row, 0).toString());
     }
 });

}

/**

查询方法
*/
private void doQuery() {
// 获取查询学号
String id = txtId.getText().trim();
if (!id.equals("")) {
students.clear();
Student student = studentService.findStudentById(id);
if (student != null) {
// 将查询到的学生添加到列表
students.add(student);
// 让删除按钮可用
btnDelete.setEnabled(true);
}
// 填充表格
fillTableData();
} else {
JOptionPane.showMessageDialog(this, “请输入待查学生学号！”, “警告”, JOptionPane.WARNING_MESSAGE);
txtId.requestFocus();
}
}

/**

填充表格方法
*/
private void fillTableData() {
// 填充表头
colHead.clear();
colHead.add(“学号”);
colHead.add(“姓名”);
colHead.add(“性别”);
colHead.add(“年龄”);
colHead.add(“系部”);
colHead.add(“班级”);
colHead.add(“电话”);

// 填充表记录
rows.clear();
for (Student student : students) {
Vector currentRow = new Vector();
currentRow.addElement(student.getId());
currentRow.addElement(student.getName());
currentRow.addElement(student.getSex());
currentRow.addElement(student.getAge() + “”);
currentRow.addElement(student.getDepartment());
currentRow.addElement(student.getClazz());
currentRow.addElement(student.getTelephone());
// 将当前行添加到记录行集
rows.add(currentRow);
}

// 创建表格（参数1：记录集；参数2：表头）
table = new JTable(rows, colHead);

// 定义滚动面板
scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
// 将滚动面板添加到中心面板
pnlCenter.add(scroller, BorderLayout.CENTER);

// 重绘窗体
repaint();

// 判断是否有记录行
if (rows.isEmpty()) {
JOptionPane.showMessageDialog(this, “没有符合条件的记录Σ(っ °Д °;)っ！”, “错误提示”, JOptionPane.WARNING_MESSAGE);
txtId.setText("");
} else {
// 让滚动条移到最上方
scroller.getVerticalScrollBar().setValue(0);
}
}

/**

主方法
@param args
*/
public static void main(String[] args) {
new DeleteStudentByIdFrame("");
}
}

效果如下：

（2）按班级
package net.wxf.student.gui;

import net.wxf.student.bean.Student;
import net.wxf.student.service.StudentService;
import net.wxf.student.service.impl.StudentServiceImpl;

import javax.swing.;
import javax.swing.border.TitledBorder;
import java.awt.;
import java.awt.event.*;
import java.util.Vector;
import java.util.List;

/**

功能：按班级删除学生记录
作者：吴旭芳

日期：2019年6月23日
/
public class DeleteStudentsByClassFrame extends JFrame {
/*

班级标签
/
private JLabel lblInputClass;
/*
班级文本框
/
private JTextField txtClass;
/*
面板
/
private JPanel panel;
private JPanel pnlSouth;
private JPanel pnlCenter;
private JPanel pnlNorth;
/*
按钮
/
private JButton btnQuery;
private JButton btnBrowseAll;
private JButton btnDelete;
private JButton btnExit;
/*
记录行集
/
private Vector rows;
/*
表格列标题
/
private Vector colHead;
/*
表格
/
private JTable table;
/*
滚动面板
*/
private JScrollPane scroller;

/**

当前记录行号
/
private int currentRow;
/*
学生列表
/
private List students;
/*
创建学生服务对象
*/
private StudentService studentService;

/**

构造方法
@param title
*/
public DeleteStudentsByClassFrame(String title) {
super(title);
intiGUI();
}

private void intiGUI() {
// 创建组件
panel = (JPanel) getContentPane();
pnlNorth = new JPanel();
pnlCenter = new JPanel();
pnlSouth = new JPanel();

 rows = new Vector();
 colHead = new Vector();

 lblInputClass = new JLabel("输入班级：");
 txtClass = new JTextField(10);
 txtClass.setHorizontalAlignment(JTextField.CENTER);
 btnQuery = new JButton("查询[Q]");
 btnQuery.setMnemonic(KeyEvent.VK_Q);
 btnBrowseAll = new JButton("显示全部记录[A]");
 btnBrowseAll.setMnemonic(KeyEvent.VK_A);
 btnDelete = new JButton("删除查询的记录[D]");
 btnDelete.setEnabled(false);// 删除按钮不可用
 btnDelete.setMnemonic(KeyEvent.VK_D);
 btnExit = new JButton("退出[X]");
 btnExit.setMnemonic(KeyEvent.VK_X);

 // 添加组件
 panel.add(pnlSouth, BorderLayout.SOUTH);
 panel.add(pnlCenter, BorderLayout.CENTER);
 panel.add(pnlNorth, BorderLayout.NORTH);

 pnlNorth.add(lblInputClass);
 pnlNorth.add(txtClass);
 pnlNorth.add(btnQuery);
 pnlNorth.add(btnBrowseAll);
 pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
 pnlSouth.add(btnDelete);
 pnlSouth.add(btnExit);
 pnlCenter.setLayout(new BorderLayout());

 // 创建标题边框对象
 TitledBorder tb = new TitledBorder("查询结果");
 pnlCenter.setBorder(tb);

 // 创建学生服务对象
 studentService = new StudentServiceImpl();
 // 获取全部学生列表
 students = studentService.findAllStudents();
 // 填充表格数据
 fillTableData();

 // 设置窗口大小
 setSize(600, 350);
 // 设置窗口不可调整大小
 setResizable(false);
 // 设置窗口屏幕居中
 setLocationRelativeTo(null);
 // 设置窗口标题
 setTitle("按班级删除学生记录");
 // 设置窗口可见
 setVisible(true);
 // 设置窗口默认关闭操作
 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);


 // 【退出】按钮单击事件
 btnExit.addActionListener(new ActionListener() {
     @Override
     public void actionPerformed(ActionEvent event) {
         dispose();
     }
 });

 // 【删除】按钮单击事件
 btnDelete.addActionListener(new ActionListener() {
     @Override
     public void actionPerformed(ActionEvent e) {
         if (!rows.isEmpty()) {
             long choice = JOptionPane.showConfirmDialog(null, "是否要删除记录_(:3」∠❀)_？");
             if (choice == JOptionPane.OK_OPTION) {
                 // 获取待删班级
                 String clazz = txtClass.getText().trim();
                 // 按班级删除学生
                 int count = studentService.deleteStudentsByClass(clazz);
                 if (count > 0) {
                     JOptionPane.showMessageDialog(null, "记录删除成功٩( 'ω' )و！", "提示", JOptionPane.INFORMATION_MESSAGE);
                     // 重新获取全部学生列表
                     students = studentService.findAllStudents();
                     // 清空待删班级文本框
                     txtClass.setText("");
                     // 填充数据
                     fillTableData();
                     // 删除按钮不可用
                     btnDelete.setEnabled(false);
                 } else {
                     JOptionPane.showMessageDialog(null, "记录删除失败Σ(っ °Д °;)っ！", "警告", JOptionPane.WARNING_MESSAGE);
                 }
             }
         }
     }
 });

 // 【查询】按钮单击事件
 btnQuery.addActionListener(new ActionListener() {
     @Override
     public void actionPerformed(ActionEvent event) {
         doQuery();
     }
 });

 // 【显示全部记录】按钮单击事件
 btnBrowseAll.addActionListener(new ActionListener() {
     @Override
     public void actionPerformed(ActionEvent event) {
         // 获取全部学生记录
         students = studentService.findAllStudents();
         // 填充表格数据
         fillTableData();
         // 删除按钮不可用
         btnDelete.setEnabled(false);
     }
 });

 // 【班级】文本框按键事件
 txtClass.addKeyListener(new KeyAdapter() {
     @Override
     public void keyPressed(KeyEvent e) {
         if (e.getKeyCode() == KeyEvent.VK_ENTER) {
             doQuery();
         }
     }
 });

 // 表格单击事件
 table.addMouseListener(new MouseAdapter() {
     public void mouseClicked(MouseEvent e) {
         // 获取当前行的行数
         int row = table.rowAtPoint(e.getPoint());
         // 选中鼠标单击的行
         table.setRowSelectionInterval(row, row);
         // 设置文本框内容
         txtClass.setText(table.getValueAt(row, 5).toString());
     }
 });

}

/**

查询方法
*/
private void doQuery() {
// 获取查询班级
String clazz = txtClass.getText().trim();
if (!clazz.equals("")) {
students = studentService.findStudentsByClass(clazz);
if (students.size() > 0) {
// 让删除按钮可用
btnDelete.setEnabled(true);
}
// 填充表格
fillTableData();
} else {
JOptionPane.showMessageDialog(this, “请输入待查班级！”, “警告”, JOptionPane.WARNING_MESSAGE);
txtClass.requestFocus();
}
}

/**

填充表格方法
*/
private void fillTableData() {
// 填充表头
colHead.clear();
colHead.add(“学号”);
colHead.add(“姓名”);
colHead.add(“性别”);
colHead.add(“年龄”);
colHead.add(“系部”);
colHead.add(“班级”);
colHead.add(“电话”);

// 填充表记录
rows.clear();
for (Student student : students) {
Vector currentRow = new Vector();
currentRow.addElement(student.getId());
currentRow.addElement(student.getName());
currentRow.addElement(student.getSex());
currentRow.addElement(student.getAge() + “”);
currentRow.addElement(student.getDepartment());
currentRow.addElement(student.getClazz());
currentRow.addElement(student.getTelephone());
// 将当前行添加到记录行集
rows.add(currentRow);
}

// 创建表格（参数1：记录集；参数2：表头）
table = new JTable(rows, colHead);

// 定义滚动面板
scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
// 将滚动面板添加到中心面板
pnlCenter.add(scroller, BorderLayout.CENTER);

// 重绘窗体
repaint();

// 判断是否有记录行
if (rows.isEmpty()) {
JOptionPane.showMessageDialog(this, “没有符合条件的记录Σ(っ °Д °;)っ！”, “错误提示”, JOptionPane.WARNING_MESSAGE);
txtClass.setText("");
} else {
// 让滚动条移到最上方
scroller.getVerticalScrollBar().setValue(0);
}
}

/**

主方法
@param args
*/
public static void main(String[] args) {
new DeleteStudentsByClassFrame("");
}
}

效果如下：

（3）按系部
package net.wxf.student.gui;

import net.wxf.student.bean.Student;
import net.wxf.student.service.StudentService;
import net.wxf.student.service.impl.StudentServiceImpl;

import javax.swing.;
import javax.swing.border.TitledBorder;
import java.awt.;
import java.awt.event.*;
import java.util.Vector;
import java.util.List;

/**

功能：按系部删除学生记录
作者：吴旭芳

日期：2019年6月23日
/
public class DeleteStudentsByDepartmentFrame extends JFrame {
/*

系部标签
/
private JLabel lblInputDepartment;
/*
系部文本框
/
private JTextField txtDepartment;
/*
面板
/
private JPanel panel;
private JPanel pnlSouth;
private JPanel pnlCenter;
private JPanel pnlNorth;
/*
按钮
/
private JButton btnQuery;
private JButton btnBrowseAll;
private JButton btnDelete;
private JButton btnExit;
/*
记录行集
/
private Vector rows;
/*
表格列标题
/
private Vector colHead;
/*
表格
/
private JTable table;
/*
滚动面板
*/
private JScrollPane scroller;

/**

当前记录行号
/
private int currentRow;
/*
学生列表
/
private List students;
/*
创建学生服务对象
*/
private StudentService studentService;

/**

构造方法
@param title
*/
public DeleteStudentsByDepartmentFrame(String title) {
super(title);
intiGUI();
}

private void intiGUI() {
// 创建组件
panel = (JPanel) getContentPane();
pnlNorth = new JPanel();
pnlCenter = new JPanel();
pnlSouth = new JPanel();

 rows = new Vector();
 colHead = new Vector();

 lblInputDepartment = new JLabel("输入系部：");
 txtDepartment = new JTextField(10);
 txtDepartment.setHorizontalAlignment(JTextField.CENTER);
 btnQuery = new JButton("查询[Q]");
 btnQuery.setMnemonic(KeyEvent.VK_Q);
 btnBrowseAll = new JButton("显示全部记录[A]");
 btnBrowseAll.setMnemonic(KeyEvent.VK_A);
 btnDelete = new JButton("删除查询的记录[D]");
 btnDelete.setEnabled(false);// 删除按钮不可用
 btnDelete.setMnemonic(KeyEvent.VK_D);
 btnExit = new JButton("退出[X]");
 btnExit.setMnemonic(KeyEvent.VK_X);

 // 添加组件
 panel.add(pnlSouth, BorderLayout.SOUTH);
 panel.add(pnlCenter, BorderLayout.CENTER);
 panel.add(pnlNorth, BorderLayout.NORTH);

 pnlNorth.add(lblInputDepartment);
 pnlNorth.add(txtDepartment);
 pnlNorth.add(btnQuery);
 pnlNorth.add(btnBrowseAll);
 pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
 pnlSouth.add(btnDelete);
 pnlSouth.add(btnExit);
 pnlCenter.setLayout(new BorderLayout());

 // 创建标题边框对象
 TitledBorder tb = new TitledBorder("查询结果");
 pnlCenter.setBorder(tb);

 // 创建学生服务对象
 studentService = new StudentServiceImpl();
 // 获取全部学生列表
 students = studentService.findAllStudents();
 // 填充表格数据
 fillTableData();

 // 设置窗口大小
 setSize(600, 350);
 // 设置窗口不可调整大小
 setResizable(false);
 // 设置窗口屏幕居中
 setLocationRelativeTo(null);
 // 设置窗口标题
 setTitle("按系部删除学生记录");
 // 设置窗口可见
 setVisible(true);
 // 设置窗口默认关闭操作
 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);


 // 【退出】按钮单击事件
 btnExit.addActionListener(new ActionListener() {
     @Override
     public void actionPerformed(ActionEvent event) {
         dispose();
     }
 });

 // 【删除】按钮单击事件
 btnDelete.addActionListener(new ActionListener() {
     @Override
     public void actionPerformed(ActionEvent e) {
         if (!rows.isEmpty()) {
             long choice = JOptionPane.showConfirmDialog(null, "是否要删除记录_(:3」∠❀)_？");
             if (choice == JOptionPane.OK_OPTION) {
                 // 获取待删系部
                 String department = txtDepartment.getText().trim();
                 // 按系部删除学生
                 int count = studentService.deleteStudentsByDepartment(department);
                 if (count > 0) {
                     JOptionPane.showMessageDialog(null, "记录删除成功٩( 'ω' )و！", "提示", JOptionPane.INFORMATION_MESSAGE);
                     // 重新获取全部学生列表
                     students = studentService.findAllStudents();
                     // 清空待删班级文本框
                     txtDepartment.setText("");
                     // 填充数据
                     fillTableData();
                     // 删除按钮不可用
                     btnDelete.setEnabled(false);
                 } else {
                     JOptionPane.showMessageDialog(null, "记录删除失败Σ(っ °Д °;)っ！", "警告", JOptionPane.WARNING_MESSAGE);
                 }
             }
         }
     }
 });

 // 【查询】按钮单击事件
 btnQuery.addActionListener(new ActionListener() {
     @Override
     public void actionPerformed(ActionEvent event) {
         doQuery();
     }
 });

 // 【显示全部记录】按钮单击事件
 btnBrowseAll.addActionListener(new ActionListener() {
     @Override
     public void actionPerformed(ActionEvent event) {
         // 获取全部学生记录
         students = studentService.findAllStudents();
         // 填充表格数据
         fillTableData();
         // 删除按钮不可用
         btnDelete.setEnabled(false);
     }
 });

 // 【系部】文本框按键事件
 txtDepartment.addKeyListener(new KeyAdapter() {
     @Override
     public void keyPressed(KeyEvent e) {
         if (e.getKeyCode() == KeyEvent.VK_ENTER) {
             doQuery();
         }
     }
 });

 // 表格单击事件
 table.addMouseListener(new MouseAdapter() {
     public void mouseClicked(MouseEvent e) {
         // 获取当前行的行数
         int row = table.rowAtPoint(e.getPoint());
         // 选中鼠标单击的行
         table.setRowSelectionInterval(row, row);
         // 设置文本框内容
         txtDepartment.setText(table.getValueAt(row, 4).toString());
     }
 });

}

/**

查询方法
*/
private void doQuery() {
// 获取查询系部
String department = txtDepartment.getText().trim();
if (!department.equals("")) {
students = studentService.findStudentsByDepartment(department);
if (students.size() > 0) {
// 让删除按钮可用
btnDelete.setEnabled(true);
}
// 填充表格
fillTableData();
} else {
JOptionPane.showMessageDialog(this, “请输入待查系部！”, “警告”, JOptionPane.WARNING_MESSAGE);
txtDepartment.requestFocus();
}
}

/**

填充表格方法
*/
private void fillTableData() {
// 填充表头
colHead.clear();
colHead.add(“学号”);
colHead.add(“姓名”);
colHead.add(“性别”);
colHead.add(“年龄”);
colHead.add(“系部”);
colHead.add(“班级”);
colHead.add(“电话”);

// 填充表记录
rows.clear();
for (Student student : students) {
Vector currentRow = new Vector();
currentRow.addElement(student.getId());
currentRow.addElement(student.getName());
currentRow.addElement(student.getSex());
currentRow.addElement(student.getAge() + “”);
currentRow.addElement(student.getDepartment());
currentRow.addElement(student.getClazz());
currentRow.addElement(student.getTelephone());
// 将当前行添加到记录行集
rows.add(currentRow);
}

// 创建表格（参数1：记录集；参数2：表头）
table = new JTable(rows, colHead);

// 定义滚动面板
scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
// 将滚动面板添加到中心面板
pnlCenter.add(scroller, BorderLayout.CENTER);

// 重绘窗体
repaint();

// 判断是否有记录行
if (rows.isEmpty()) {
JOptionPane.showMessageDialog(this, “没有符合条件的记录Σ(っ °Д °;)っ！”, “错误提示”, JOptionPane.WARNING_MESSAGE);
txtDepartment.setText("");
} else {
// 让滚动条移到最上方
scroller.getVerticalScrollBar().setValue(0);
}
}

/**

主方法
@param args
*/
public static void main(String[] args) {
new DeleteStudentsByDepartmentFrame("");
}
}

效果如下：

18、实现统计功能界面化：
（1）按系部
package net.wxf.student.gui;

import net.wxf.student.service.StudentService;
import net.wxf.student.service.impl.StudentServiceImpl;

import javax.swing.;
import javax.swing.border.TitledBorder;
import java.awt.;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.print.PrinterException;
import java.util.Vector;

/**

功能：按系部统计学生人数
作者：吴旭芳
日期：2019年6月24日
/
public class CountStudentsByDepartmentFrame extends JFrame {
/*
- 面板
  /
  private JPanel panel;
  private JPanel pnlSouth;
  private JPanel pnlCenter;
  /*
- 按钮
  /
  private JButton btnPrint;
  private JButton btnExit;
  /*
- 记录行集
  /
  private Vector rows;
  /*
- 表格列标题
  /
  private Vector colHead;
  /*
- 表格
  /
  private JTable table;
  /*
- 滚动面板
  /
  private JScrollPane scroller;
  /*
- 创建学生服务对象
  */
  private StudentService studentService;
public CountStudentsByDepartmentFrame(String title) {
super(title);
initGUI();
}

/**
- 初始化用户界面
  */
  private void initGUI() {
  // 创建组件
  panel = (JPanel) getContentPane();
  pnlCenter = new JPanel();
  pnlSouth = new JPanel();
  
  rows = new Vector();
  colHead = new Vector();
  
  btnPrint = new JButton(“打印[P]”);
  btnPrint.setMnemonic(KeyEvent.VK_P);
  btnExit = new JButton(“退出[X]”);
  btnExit.setMnemonic(KeyEvent.VK_X);
  
  // 添加组件
  panel.add(pnlSouth, BorderLayout.SOUTH);
  panel.add(pnlCenter, BorderLayout.CENTER);
  
  pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
  pnlSouth.add(btnPrint);
  pnlSouth.add(btnExit);
  pnlCenter.setLayout(new BorderLayout());
  
  TitledBorder tb = new TitledBorder(“统计结果”);
  pnlCenter.setBorder(tb);
  
  // 创建学生服务对象
  studentService = new StudentServiceImpl();
  // 获取按系部统计结果记录行集
  rows = studentService.findRowsByDepartment();
  // 设置表头
  colHead.add(“系部”);
  colHead.add(“人数”);
  
  // 创建表格（参数1：记录集；参数2：表头）
  table = new JTable(rows, colHead);
  scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
  JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
  pnlCenter.add(scroller, BorderLayout.CENTER);
  
  repaint(); // 重绘窗体
  
  if (rows.isEmpty()) {
  JOptionPane.showMessageDialog(this, “没有记录！”, “错误提示”, JOptionPane.WARNING_MESSAGE);
  }
  
  // 设置窗口大小
  setSize(300, 200);
  // 设置窗口不可调整大小
  setResizable(false);
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  // 设置窗口标题
  setTitle(“按班级统计学生人数”);
  // 设置窗口可见
  setVisible(true);
  // 设置窗口默认关闭操作
  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  
  // 【退出】按钮单击事件
  btnExit.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent arg0) {
  dispose();
  }
  });
  
  // 【打印】按钮单击事件
  btnPrint.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  try {
  table.print();
  } catch (PrinterException e1) {
  e1.printStackTrace();
  }
  }
  });
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  new CountStudentsByDepartmentFrame("");
  }
  }

效果如下：

（2）按班级
package net.wxf.student.gui;

import net.wxf.student.service.StudentService;
import net.wxf.student.service.impl.StudentServiceImpl;

/**

功能：按班级统计学生人数
作者：吴旭芳
日期：2019年6月24日
/
public class CountStudentsByClassFrame extends JFrame {
/*
- 面板
  /
  private JPanel panel;
  private JPanel pnlSouth;
  private JPanel pnlCenter;
  /*
- 按钮
  /
  private JButton btnPrint;
  private JButton btnExit;
  /*
- 记录行集
  /
  private Vector rows;
  /*
- 表格列标题
  /
  private Vector colHead;
  /*
- 表格
  /
  private JTable table;
  /*
- 滚动面板
  /
  private JScrollPane scroller;
  /*
- 创建学生服务对象
  */
  private StudentService studentService;
public CountStudentsByClassFrame(String title) {
super(title);
initGUI();
}

/**
- 初始化用户界面
  */
  private void initGUI() {
  // 创建组件
  panel = (JPanel) getContentPane();
  pnlCenter = new JPanel();
  pnlSouth = new JPanel();
  
  rows = new Vector();
  colHead = new Vector();
  
  btnPrint = new JButton(“打印[P]”);
  btnPrint.setMnemonic(KeyEvent.VK_P);
  btnExit = new JButton(“退出[X]”);
  btnExit.setMnemonic(KeyEvent.VK_X);
  
  // 添加组件
  panel.add(pnlSouth, BorderLayout.SOUTH);
  panel.add(pnlCenter, BorderLayout.CENTER);
  
  pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
  pnlSouth.add(btnPrint);
  pnlSouth.add(btnExit);
  pnlCenter.setLayout(new BorderLayout());
  
  TitledBorder tb = new TitledBorder(“统计结果”);
  pnlCenter.setBorder(tb);
  
  // 创建学生服务对象
  studentService = new StudentServiceImpl();
  // 获取按班级统计结果记录行集
  rows = studentService.findRowsByClass();
  // 设置表头
  colHead.add(“班级”);
  colHead.add(“人数”);
  
  // 创建表格（参数1：记录集；参数2：表头）
  table = new JTable(rows, colHead);
  scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
  JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
  pnlCenter.add(scroller, BorderLayout.CENTER);
  
  repaint(); // 重绘窗体
  
  if (rows.isEmpty()) {
  JOptionPane.showMessageDialog(this, “没有记录！”, “错误提示”, JOptionPane.WARNING_MESSAGE);
  }
  
  // 设置窗口大小
  setSize(300, 200);
  // 设置窗口不可调整大小
  setResizable(false);
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  // 设置窗口标题
  setTitle(“按班级统计学生人数”);
  // 设置窗口可见
  setVisible(true);
  // 设置窗口默认关闭操作
  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  
  // 【退出】按钮单击事件
  btnExit.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent arg0) {
  dispose();
  }
  });
  
  // 【打印】按钮单击事件
  btnPrint.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  try {
  table.print();
  } catch (PrinterException e1) {
  e1.printStackTrace();
  }
  }
  });
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  new CountStudentsByClassFrame("");
  }
  }
  效果如下：
  
  （3）按性别
  package net.wxf.student.gui;

import net.wxf.student.service.StudentService;
import net.wxf.student.service.impl.StudentServiceImpl;

/**

功能：按性别统计学生人数
作者：吴旭芳
日期：2019年6月24日
/
public class CountStudentsBySexFrame extends JFrame {
/*
- 面板
  /
  private JPanel panel;
  private JPanel pnlSouth;
  private JPanel pnlCenter;
  /*
- 按钮
  /
  private JButton btnPrint;
  private JButton btnExit;
  /*
- 记录行集
  /
  private Vector rows;
  /*
- 表格列标题
  /
  private Vector colHead;
  /*
- 表格
  /
  private JTable table;
  /*
- 滚动面板
  /
  private JScrollPane scroller;
  /*
- 创建学生服务对象
  */
  private StudentService studentService;
public CountStudentsBySexFrame(String title) {
super(title);
initGUI();
}

/**
- 初始化用户界面
  */
  private void initGUI() {
  // 创建组件
  panel = (JPanel) getContentPane();
  pnlCenter = new JPanel();
  pnlSouth = new JPanel();
  
  rows = new Vector();
  colHead = new Vector();
  
  btnPrint = new JButton(“打印[P]”);
  btnPrint.setMnemonic(KeyEvent.VK_P);
  btnExit = new JButton(“退出[X]”);
  btnExit.setMnemonic(KeyEvent.VK_X);
  
  // 添加组件
  panel.add(pnlSouth, BorderLayout.SOUTH);
  panel.add(pnlCenter, BorderLayout.CENTER);
  
  pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
  pnlSouth.add(btnPrint);
  pnlSouth.add(btnExit);
  pnlCenter.setLayout(new BorderLayout());
  
  TitledBorder tb = new TitledBorder(“统计结果”);
  pnlCenter.setBorder(tb);
  
  // 创建学生服务对象
  studentService = new StudentServiceImpl();
  // 获取按性别统计结果记录行集
  rows = studentService.findRowsBySex();
  // 设置表头
  colHead.add(“性别”);
  colHead.add(“人数”);
  
  // 创建表格（参数1：记录集；参数2：表头）
  table = new JTable(rows, colHead);
  scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
  JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
  pnlCenter.add(scroller, BorderLayout.CENTER);
  
  repaint(); // 重绘窗体
  
  if (rows.isEmpty()) {
  JOptionPane.showMessageDialog(this, “没有记录！”, “错误提示”, JOptionPane.WARNING_MESSAGE);
  }
  
  // 设置窗口大小
  setSize(300, 200);
  // 设置窗口不可调整大小
  setResizable(false);
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  // 设置窗口标题
  setTitle(“按性别统计学生人数”);
  // 设置窗口可见
  setVisible(true);
  // 设置窗口默认关闭操作
  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  
  // 【退出】按钮单击事件
  btnExit.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent arg0) {
  dispose();
  }
  });
  
  // 【打印】按钮单击事件
  btnPrint.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  try {
  table.print();
  } catch (PrinterException e1) {
  e1.printStackTrace();
  }
  }
  });
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  new CountStudentsBySexFrame("");
  }
  }
  效果如下：
  
  19、设置状态栏SetStatusBarFrame（这时代码打好后仍会报错，要等到MainFrame类里写好setStatusBar()方法之后，才能测试该程序）

package net.wxf.student.gui;

import net.wxf.student.app.Application;
import net.wxf.student.bean.Status;
import net.wxf.student.service.StatusService;
import net.wxf.student.service.impl.StatusServiceImpl;

import javax.swing.;
import java.awt.;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;

/**

功能：设置状态栏信息
作者：吴旭芳
日期：2019年6月24日
/
public class SetStatusBarFrame extends JFrame {
/*
- 面板
  /
  private JPanel panel;
  private JPanel panel1;
  private JPanel panel2;
  private JPanel panel3;
  private JPanel panel4;
  private JPanel panel5;
  /*
- 标签
  /
  private JLabel lblCollege;
  private JLabel lblVersion;
  private JLabel lblAuthor;
  private JLabel lblTelephone;
  private JLabel lblAddress;
  private JLabel lblEmail;
  /*
- 文本框
  /
  private JTextField txtCollege;
  private JTextField txtVersion;
  private JTextField txtAuthor;
  private JTextField txtTelephone;
  private JTextField txtAddress;
  private JTextField txtEmail;
  /*
- 按钮
  /
  private JButton btnSave;
  private JButton btnExit;
  /*
- 状态服务对象
  */
  private StatusService statusService;
/**
- 构造方法
- @param title
  */
  public SetStatusBarFrame(String title) {
  super(title);
  initGUI();
  }
/**
- 初始化用户界面
  */
  private void initGUI() {
  // 创建组件
  panel = (JPanel) getContentPane();
  panel1 = new JPanel();
  panel2 = new JPanel();
  panel3 = new JPanel();
  panel4 = new JPanel();
  panel5 = new JPanel();
  
  lblCollege = new JLabel(“校名：”);
  lblVersion = new JLabel(“版本：”);
  lblAuthor = new JLabel(“作者：”);
  lblTelephone = new JLabel(“电话：”);
  lblAddress = new JLabel(“地址：”);
  lblEmail = new JLabel(“邮件：”);
  
  txtCollege = new JTextField(12);
  txtVersion = new JTextField(12);
  txtAuthor = new JTextField(12);
  txtTelephone = new JTextField(12);
  txtAddress = new JTextField(29);
  txtEmail = new JTextField(29);
  
  btnSave = new JButton(“保存[S]”);
  btnSave.setMnemonic(KeyEvent.VK_S);
  btnExit = new JButton(“退出[X]”);
  btnExit.setMnemonic(KeyEvent.VK_X);
  
  // 添加组件
  panel.setLayout(new GridLayout(5, 1));
  panel.add(panel1);
  panel.add(panel2);
  panel.add(panel3);
  panel.add(panel4);
  panel.add(panel5);
  
  panel1.add(lblCollege);
  panel1.add(txtCollege);
  panel1.add(lblVersion);
  panel1.add(txtVersion);
  
  panel2.add(lblAuthor);
  panel2.add(txtAuthor);
  panel2.add(lblTelephone);
  panel2.add(txtTelephone);
  
  panel3.add(lblAddress);
  panel3.add(txtAddress);
  panel4.add(lblEmail);
  panel4.add(txtEmail);
  
  panel5.add(btnSave);
  panel5.add(btnExit);
  
  // 创建状态服务对象
  statusService = new StatusServiceImpl();
  // 按标识符获取状态对象
  Status status = statusService.findStatusById(1);
  if (status != null) {
  txtCollege.setText(status.getCollege());
  txtVersion.setText(status.getVersion());
  txtAuthor.setText(status.getAuthor());
  txtAddress.setText(status.getAuthor());
  txtTelephone.setText(status.getTelephone());
  txtAddress.setText(status.getAddress());
  txtEmail.setText(status.getEmail());
  }
  
  // 设置窗口属性
  setResizable(false);
  pack();
  setLocationRelativeTo(null);
  setVisible(true);
  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  
  // 【关闭】按钮事件处理
  btnExit.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent arg0) {
  dispose();
  }
  });
  
  // 【保存】按钮事件处理
  btnSave.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  // 获取状态信息对象
  Status status = statusService.findStatusById(1);
  // 修改属性值
  status.setCollege(txtCollege.getText());
  status.setVersion(txtVersion.getText());
  status.setAuthor(txtAuthor.getText());
  status.setTelephone(txtTelephone.getText());
  status.setAddress(txtAddress.getText());
  status.setEmail(txtEmail.getText());
  // 更新状态记录
  int count = statusService.updateStatus(status);
  // 判断是否更新成功
  if (count > 0) {
  Application.mainFrame.setStatusBar();
  Application.mainFrame.setTitle(“学生信息管理系统” + status.getVersion());
  }
  }
  });
  }
  }

20、补充系统主窗口MainFrame

package net.wxf.student.gui;

import net.wxf.student.app.Application;
import net.wxf.student.bean.Status;
import net.wxf.student.service.StatusService;
import net.wxf.student.service.impl.StatusServiceImpl;

import javax.swing.;
import java.awt.;
import java.awt.event.*;
import java.io.IOException;

/**

功能：主界面窗口
```
 通过菜单系统
```
```
 调用各个功能模块
```
作者：吴旭芳
日期：2019年6月20日
/
public class MainFrame extends JFrame {
/*
- 菜单部分
  /
  private JMenuBar mnbMain;
  /*
- 设置菜单
  /
  private JMenu mnuSet;
  private JMenuItem mniSetCollegeInfo;
  private JMenuItem mniSetStatusBar;
  private JMenuItem mniChangePassword;
  private JMenuItem mniExit;
  /*
- 操作菜单
  /
  private JMenu mnuOperate;
  private JMenuItem mniAddStudent;
  private JMenuItem mniBrowseStudent;
  private JMenuItem mniEditStudent;
  /*
- 删除菜单
  /
  private JMenu mnuDelStu;
  private JMenuItem mniDelStudentById;
  private JMenuItem mniDelStudentsByClass;
  private JMenuItem mniDelStudentsByDepartment;
  /*
- 查询菜单
  /
  private JMenu mnuFind;
  private JMenuItem mniFindStudentById;
  private JMenuItem mniFindStudentsByName;
  private JMenuItem mniFindStudentsByClass;
  private JMenuItem mniFindStudentsByDepartment;
  /*
- 统计菜单
  /
  private JMenu mnuCount;
  private JMenuItem mniCountStudentsBySex;
  private JMenuItem mniCountStudentsByClass;
  private JMenuItem mniCountStudentsByDepartment;
  /*
- 帮助菜单
  /
  private JMenu mnuHelp;
  private JMenuItem mniHelp;
  private JMenuItem mniAbout;
  /*
- 面板
  /
  private JPanel panel;
  private JPanel pnlCenter;
  private JPanel pnlSouth;
  /*
- 状态栏标签
  /
  private JLabel lblStatusBar;
  /*
- 背景标签
  */
  private JLabel lblBackground;
/**
- 图标对象
  /
  private ImageIcon imgCollege;
  private ImageIcon imgExit;
  private ImageIcon imgPassword;
  private ImageIcon imgQuery;
  private ImageIcon imgBrowse;
  private ImageIcon imgCount;
  private ImageIcon imgBackground;
  /*
- 工具栏
  /
  private JToolBar toolbar;
  /*
- 按钮
  /
  private JButton btnSetCollege;
  private JButton btnChangePassword;
  private JButton btnFindStudentById;
  private JButton btnExit;
  private JButton btnBrowseStudent;
  private JButton btnCountByDepartment;
  /*
- 状态对象
  /
  private static Status status;
  /*
- 状态服务对象
  */
  private StatusService statusService;
/**
- 构造方法
- @param title
  */
  public MainFrame(String title) {
  super(title);
  initGUI();
  }
/**
- 初始化图形用户界面
  */
  private void initGUI() {
  // 创建主菜单
  mnbMain = new JMenuBar();
  
  // 创建【设置】菜单及其菜单项
  mnuSet = new JMenu(“系统设置[S]”);
  mnuSet.setMnemonic(KeyEvent.VK_S);
  mniSetCollegeInfo = new JMenuItem(“学校信息”);
  mniSetStatusBar = new JMenuItem(“状态栏信息”);
  mniChangePassword = new JMenuItem(“修改密码”);
  mniExit = new JMenuItem(“退出系统”);
  
  // 创建【操作】菜单及其菜单项
  mnuOperate = new JMenu(“数据操作[O]”);
  mnuOperate.setMnemonic(KeyEvent.VK_O);
  mniAddStudent = new JMenuItem(“增加学生表记录”);
  mnuDelStu = new JMenu(“删除学生表记录”);
  mniEditStudent = new JMenuItem(“编辑学生表记录”);
  mniBrowseStudent = new JMenuItem(“浏览学生表记录”);
  
  // 创建【删除学生表记录】的子菜单
  mniDelStudentById = new JMenuItem(“按学号删除”);
  mniDelStudentsByClass = new JMenuItem(“按班级删除”);
  mniDelStudentsByDepartment = new JMenuItem(“按系部删除”);
  
  // 创建【查询】菜单及其菜单项
  mnuFind = new JMenu(“查询学生[Q]”);
  mnuFind.setMnemonic(KeyEvent.VK_Q);
  mniFindStudentById = new JMenuItem(“按学号查询”);
  mniFindStudentsByName = new JMenuItem(“按姓名查询”);
  mniFindStudentsByClass = new JMenuItem(“按班级查询”);
  mniFindStudentsByDepartment = new JMenuItem(“按系部查询”);
  
  // 创建【统计】菜单及其菜单项
  mnuCount = new JMenu(“人数统计[C]”);
  mnuCount.setMnemonic(KeyEvent.VK_C);
  mniCountStudentsBySex = new JMenuItem(“按性别统计”);
  mniCountStudentsByClass = new JMenuItem(“按班级统计”);
  mniCountStudentsByDepartment = new JMenuItem(“按系部统计”);
  
  // 创建【帮助】菜单及其菜单项
  mnuHelp = new JMenu(“帮助[H]”);
  mnuHelp.setMnemonic(KeyEvent.VK_H);
  mniHelp = new JMenuItem(“帮助”);
  mniAbout = new JMenuItem(“关于”);
  
  // 创建图标对象
  imgCollege = new ImageIcon(“images/college.png”);
  imgPassword = new ImageIcon(“images/password.png”);
  imgQuery = new ImageIcon(“images/query.png”);
  imgBrowse = new ImageIcon(“images/browse.png”);
  imgCount = new ImageIcon(“images/count.png”);
  imgExit = new ImageIcon(“images/exit.png”);
  
  // 创建工具栏
  toolbar = new JToolBar();
  btnSetCollege = new JButton(“设置学校”, imgCollege);
  btnSetCollege.setToolTipText(“设置学校信息”);
  btnSetCollege.setVerticalTextPosition(AbstractButton.BOTTOM);
  btnSetCollege.setHorizontalTextPosition(AbstractButton.CENTER);
  btnChangePassword = new JButton(“修改密码”, imgPassword);
  btnChangePassword.setToolTipText(“修改用户密码”);
  btnChangePassword.setVerticalTextPosition(AbstractButton.BOTTOM);
  btnChangePassword.setHorizontalTextPosition(AbstractButton.CENTER);
  btnBrowseStudent = new JButton(“浏览学生”, imgBrowse);
  btnBrowseStudent.setToolTipText(“浏览学生记录”);
  btnBrowseStudent.setVerticalTextPosition(AbstractButton.BOTTOM);
  btnBrowseStudent.setHorizontalTextPosition(AbstractButton.CENTER);
  btnFindStudentById = new JButton(“查询学生”, imgQuery);
  btnFindStudentById.setToolTipText(“按学号查询学生记录”);
  btnFindStudentById.setVerticalTextPosition(AbstractButton.BOTTOM);
  btnFindStudentById.setHorizontalTextPosition(AbstractButton.CENTER);
  btnCountByDepartment = new JButton(“统计人数”, imgCount);
  btnCountByDepartment.setToolTipText(“按系部统计学生人数”);
  btnCountByDepartment.setVerticalTextPosition(AbstractButton.BOTTOM);
  btnCountByDepartment.setHorizontalTextPosition(AbstractButton.CENTER);
  btnExit = new JButton(“退出系统”, imgExit);
  btnExit.setToolTipText(“退出系统”);
  btnExit.setVerticalTextPosition(AbstractButton.BOTTOM);
  btnExit.setHorizontalTextPosition(AbstractButton.CENTER);
  toolbar.add(btnSetCollege);
  toolbar.add(btnChangePassword);
  toolbar.add(btnBrowseStudent);
  toolbar.add(btnFindStudentById);
  toolbar.add(btnCountByDepartment);
  toolbar.add(btnExit);
  
  // 创建面板
  panel = (JPanel) getContentPane();
  pnlCenter = new JPanel();
  pnlSouth = new JPanel();
  pnlSouth.setLayout(new FlowLayout(FlowLayout.LEFT));
  
  // 创建背景图片
  imgBackground = new ImageIcon(“images/background.jpg”);
  // 创建背景标签
  lblBackground = new JLabel(imgBackground);
  // 创建状态栏标签
  lblStatusBar = new JLabel();
  
  // 设置菜单栏
  setJMenuBar(mnbMain);
  // 添加【设置】菜单
  mnbMain.add(mnuSet);
  mnuSet.add(mniSetCollegeInfo);
  mnuSet.add(mniSetStatusBar);
  mnuSet.add(mniChangePassword);
  mnuSet.addSeparator();
  mnuSet.add(mniExit);
  
  // 添加【删除学生表记录】菜单
  mnuDelStu.add(mniDelStudentById);
  mnuDelStu.add(mniDelStudentsByClass);
  mnuDelStu.add(mniDelStudentsByDepartment);
  
  // 添加【操作】菜单
  mnbMain.add(mnuOperate);
  mnuOperate.add(mniAddStudent);
  mnuOperate.add(mniEditStudent);
  mnuOperate.add(mnuDelStu);
  mnuOperate.add(mniBrowseStudent);
  
  // 添加【查询】菜单
  mnbMain.add(mnuFind);
  mnuFind.add(mniFindStudentById);
  mnuFind.add(mniFindStudentsByName);
  mnuFind.add(mniFindStudentsByClass);
  mnuFind.add(mniFindStudentsByDepartment);
  
  // 添加【统计】菜单
  mnbMain.add(mnuCount);
  mnuCount.add(mniCountStudentsBySex);
  mnuCount.add(mniCountStudentsByClass);
  mnuCount.add(mniCountStudentsByDepartment);
  
  // 添加【帮助】菜单
  mnbMain.add(mnuHelp);
  mnuHelp.add(mniHelp);
  mnuHelp.add(mniAbout);
  
  // 添加面板
  panel.setLayout(new BorderLayout());
  panel.add(toolbar, “North”);
  panel.add(pnlCenter, “Center”);
  panel.add(pnlSouth, “South”);
  pnlCenter.add(lblBackground);
  pnlSouth.add(lblStatusBar);
  
  // 非管理员不能设置状态栏
  if (!Application.username.equals(“admin”)) {
  mniSetStatusBar.setEnabled(false);
  mniAddStudent.setEnabled(false);
  mnuDelStu.setEnabled(false);
  mniEditStudent.setEnabled(false);
  }
  
  // 设置状态栏信息
  setStatusBar();
  // 创建状态服务对象
  statusService = new StatusServiceImpl();
  // 获取状态对象
  status = statusService.findStatusById(1);
  // 设置窗口尺寸
  setSize(800, 640);
  // 设置窗口可见
  setVisible(true);
  // 设置窗口屏幕居中
  setLocationRelativeTo(null);
  //设置窗口标题
  setTitle(“学生信息管理系统”+status.getVersion());
  // // 关闭窗口单击事件，注册窗口监听器，继承窗口适配器方法，编写事件处理方法
  addWindowFocusListener(new WindowAdapter() {
  @Override
  public void windowClosing(WindowEvent e){
  exitSystem();
  }
  });
  // 设置菜单
  // 【设置学校信息】菜单项单击事件
  mniSetCollegeInfo.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new SetCollegeInforFrame("");
  }
  });
  
  // 【设置状态栏信息】菜单项单击事件
  mniSetStatusBar.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new SetStatusBarFrame("");
  }
  });
  
  // 【修改密码】菜单项单击事件
  mniChangePassword.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new ChangePasswordFrame("");
  }
  });
  
  // 【退出系统】菜单项单击事件
  mniExit.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  exitSystem();
  }
  });
  
  // 查询菜单
  // 【按学号查询】菜单项单击事件
  mniFindStudentById.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new FindStudentByIdFrame("");
  }
  });
  
  // 【按姓名查询】菜单项单击事件
  mniFindStudentsByName.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new FindStudentsByNameFrame("");
  }
  });
  
  // 【按班级查询】菜单项单击事件
  mniFindStudentsByClass.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new FindStudentsByClassFrame("");
  }
  });
  
  // 【按系部查询】菜单项单击事件
  mniFindStudentsByDepartment.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new FindStudentsByDepartmentFrame("");
  }
  });
  
  // 统计菜单
  // 【按性别统计人数】菜单项单击事件
  mniCountStudentsBySex.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new CountStudentsBySexFrame("");
  }
  });
  
  // 【按班级统计人数】菜单项单击事件
  mniCountStudentsByClass.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new CountStudentsByClassFrame("");
  }
  });
  
  // 【按系部统计人数】菜单项单击事件
  mniCountStudentsByDepartment.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new CountStudentsByDepartmentFrame("");
  }
  });
  
  // 【增加学生记录】菜单项单击事件
  mniAddStudent.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  new AddStudentFrame("");
  }
  });
  
  // 【按学号删除学生记录】菜单项单击事件
  mniDelStudentById.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new DeleteStudentByIdFrame("");
  }
  });
  
  // 【按班级删除学生记录】菜单项单击事件
  mniDelStudentsByClass.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new DeleteStudentsByClassFrame("");
  }
  });
  
  // 【按系部删除学生记录】菜单项单击事件
  mniDelStudentsByDepartment.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new DeleteStudentsByDepartmentFrame("");
  }
  });
  
  // 【编辑学生记录】菜单项单击事件
  mniEditStudent.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  new EditStudentFrame("");
  }
  });
  
  // 【浏览学生记录】菜单项单击事件
  mniBrowseStudent.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  new BrowseStudentsFrame("");
  }
  });
  
  // 【帮助】菜单单击事件
  mniHelp.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  try {
  Runtime.getRuntime().exec(“cmd /c start help/帮助文档.chm”);
  } catch (IOException e1) {
  JOptionPane.showMessageDialog(null, e1.getMessage(), “学生信息管理系统”, JOptionPane.ERROR_MESSAGE);
  }
  }
  });
  
  // 【关于】菜单单击事件
  mniAbout.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  JOptionPane.showMessageDialog(null,
  “开发人员：” + status.getCollege() + “_” + status.getAuthor() + “\n联系电话：” + status.getTelephone()
  + “\n电子邮箱：” + status.getEmail(),
  “学生信息管理系统” + status.getVersion(), JOptionPane.INFORMATION_MESSAGE);
  }
  });
  
  // 工具栏按钮单击事件
  // 【设置学校信息】按钮
  btnSetCollege.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new SetCollegeInforFrame("");
  }
  });
  
  // 【修改密码】按钮
  btnChangePassword.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new ChangePasswordFrame("");
  }
  });
  
  // 【浏览】按钮
  btnBrowseStudent.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new BrowseStudentsFrame("");
  }
  });
  
  // 【查询】按钮
  btnFindStudentById.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new FindStudentByIdFrame("");
  }
  });
  
  // 【统计】按钮
  btnCountByDepartment.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  new CountStudentsByDepartmentFrame("");
  }
  });
  
  // 【退出】按钮
  btnExit.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
  exitSystem();
  }
  });
}
/**
- 退出系统
  */
  protected void exitSystem() {
  int choice = JOptionPane.showConfirmDialog(null, “你真的要退出系统吗Σ(っ °Д °;)っ？”, “学生信息管理系统”, JOptionPane.YES_NO_OPTION);
  if (choice == JOptionPane.YES_OPTION) {
  System.exit(0);
  } else {
  // 卸载当前窗口
  dispose();
  //重新显示主窗口
  Application.mainFrame = new MainFrame(“学生信息管理系统” + status.getVersion());
  }
  }
/**
- 设置状态栏信息
  */
  void setStatusBar() {
  // 创建状态服务对象
  statusService = new StatusServiceImpl();
  // 获取状态栏对象
  status = statusService.findStatusById(1);
  // 设置状态栏标签
  lblStatusBar.setText(
  status.getCollege() + “学生信息管理系统” + status.getVersion() + " 作者：" + status.getAuthor() + " 地址："
  + status.getAddress() + " 电话：" + status.getTelephone() + " 邮箱：" + status.getEmail());
  }
/**
- 主方法
- @param args
  */
  public static void main(String[] args) {
  StatusService statusService = new StatusServiceImpl();
  status = statusService.findStatusById(1);
  Application.mainFrame = new MainFrame("" );
  }
  }

补充完整后不能在MainFrame中运行，会报错，我们应该到登陆页面去运行，既可进行相应的跳转

实训项目日志——《学生信息管理系统》part.4

今日份学习总结

过程如下：

你可能感兴趣的:(学习总结)