JAVA课程设计：学生成绩管理系统（第一部分）
JAVA课程设计：学生成绩管理系统
- 首先我先设计了一个管理员登陆界面，并实现了登陆的相关Demo。
package windowuser;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
public class WindowUser extends JFrame {
public static void main(String[] args) {
new WindowUser();
}
public WindowUser(){
this.setSize(300,290);
this.setTitle("登陆界面");
this.setLocation(500,500);
JLabel jl1 = new JLabel("用户名");
JLabel jl2 = new JLabel("密 码");
JTextField jt = new JTextField(15); //实例化用户名框
JPasswordField jp = new JPasswordField(15); //实例化密码框
jp.setEchoChar('*'); //密码以**显示
JButton jb1 = new JButton("登陆");
JButton jb2 = new JButton("退出");
this.setVisible(true);
JPanel m= new JPanel(); //获取一个容器
m.add(jl1);
m.add(jl2);
m.add(jt);
m.add(jp);
m.add(jb1);
m.add(jb2);
m.setBounds(300, 300, 300, 290);
m.setLayout(null);
jl1.setBounds(10, 40, 50, 18);
jl2.setBounds(10, 80, 50, 18);
jt.setBounds(60, 40, 200, 18);
jp.setBounds(60, 80, 200, 18);
jb1.setBounds(80, 180, 60, 30);
jb2.setBounds(150, 180, 60, 30);
this.add(m);
//进入学生管理系统界面
jb1.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if(jt.getText().trim().equals("admin")&&new String(jp.getPassword()).equals("123456")){
JOptionPane.showMessageDialog(null, "登陆成功","消息",JOptionPane.INFORMATION_MESSAGE);
dispose();
new View();
}else{
JOptionPane.showMessageDialog(null, "登陆失败","消息",JOptionPane.ERROR_MESSAGE);
//置输入框内容为空
jt.setText("");
jp.setText("");
}
}
});
jb2.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
System.exit(0);
}
});
//对文本框进行监听
KeyListener key = new KeyListener() {
public void keyTyped(KeyEvent e) {}
public void keyReleased(KeyEvent e) {}
public void keyPressed(KeyEvent e) {
if(e.getKeyChar()==KeyEvent.VK_ENTER){
if(jt.getText().trim().equals("admin")&&new String(jp.getPassword()).equals("123456")){
JOptionPane.showMessageDialog(null,"登陆成功","消息",JOptionPane.INFORMATION_MESSAGE);
new View();
}
}else if(e.getKeyChar()==KeyEvent.VK_ESCAPE){
JOptionPane.showConfirmDialog(null, "是否退出","消息",JOptionPane.YES_NO_OPTION);
try {
Thread.sleep(1000);
} catch (InterruptedException e1) {
e1.printStackTrace();
}
System.exit(-1);
}
}
};
//添加监听器
jt.addKeyListener(key);
jp.addKeyListener(key);
}
}
**
2.主程序管理界面的设计
```java
package llxy.project.view;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Label;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.nio.channels.SelectableChannel;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import llxy.project.Tools.GuiTools;
import llxy.project.play.SelectStuMessage;
```java
public class StuGradeWindow extends JFrame{
public static void main(String[] args) {
new StuGradeWindow();
}
public StuGradeWindow(){
this.setSize(622,470);
//this.setLocation(300, 200);
this.setVisible(true);
this.setTitle("学生管理系统");
this.setResizable(false); //窗口大小固定
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//背景图片
JPanel bg =new JPanel();
ImageIcon img = new ImageIcon("ppp.png");
JLabel j1 =new JLabel(img);
j1.setBounds(0, 0,img.getIconHeight(), img.getIconWidth());
bg.add(j1);
this.add(bg, BorderLayout.NORTH);
JPanel panel = new JPanel(); //创建一个面板 存储组件
JButton btn1 = new JButton("1.查询学生信息");
JButton btn2 = new JButton("2.学生成绩排序");
JButton btn3 = new JButton("3.学生信息管理");
JButton btn4 = new JButton("4.其他查询");
JButton btn5 = new JButton(" 退出 ");
panel.add(btn1);
btn1.setBackground(Color.GREEN);
panel.add(btn2);
btn2.setBackground(Color.green);
panel.add(btn3);
btn3.setBackground(Color.green);
panel.add(btn4);
btn4.setBackground(Color.green);
panel.add(btn5);
btn5.setBackground(Color.green);
panel.setBackground(Color.lightGray);
this.add(panel,BorderLayout.SOUTH);
GuiTools.center(this);
GuiTools.setTitleImage(this,"1.jpg");
//btn1
btn1.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
SelectStuMessage sel = new SelectStuMessage();
}
});
//
btn2.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
}
});
//
btn3.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
}
});
//
btn4.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
}
});
//
btn5.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
}
}
目前实现了以上界面的设计，在其中学习到了许多的知识点。
1.对于密码的隐私处理：使用password.setEchoChar(’’); 让密码部分变成*****
2.JOptionPane.showMessageDialog：消息框。
四种消息提示框方法
showConfirmDialog()：确认对话框
showInputDialog()：输入对话框
showMessageDialog()：消息对话框
showOptionDialog()：选择对话框
五种消息类型（图标的种类）：
ERROR_MESSAGE：错误
INFORMATION_MESSAGE：普通
WARNING_MESSAGE：警告
QUESTION_MESSAGE：问
PLAIN_MESSAGE：无图标
对了，还有工具类让GUI界面居中，而且为他添加title的图标。
package llxy.project.Tools;
/**
* GUI工具类
*/
import java.awt.Component;
import java.awt.Toolkit;
import javax.swing.JFrame;
public class GuiTools {
static Toolkit kit = Toolkit.getDefaultToolkit();
//居中
public static void center(Component c){
int x = (kit.getScreenSize().width-c.getWidth())/2;
int y = (kit.getScreenSize().height-c.getHeight())/2;
c.setLocation(x, y);
}
//指定窗口设置图标标题
public static void setTitleImage(JFrame frame,String titleIconPath){
frame.setIconImage(kit.createImage(titleIconPath));
}
}