Java+MySQL实现学生信息管理系统

基于Java swing+MySQL实现学生信息管理系统：主要实现JDBC对学生信息进行增删改查，应付一般课设足矣，分享给大家。

源码：

https://github.com/ZhuangM/student.git

1、 开发环境：jdk7+MySQL5+win7

代码结构：model-dao-view

2、 数据库设计——建库建表语句

CREATE DATABASE student;

DROP TABLE IF EXISTS `admin`;
CREATE TABLE `admin` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(20) NOT NULL,
  `username` varchar(20) NOT NULL,
  `password` varchar(20) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;

LOCK TABLES `admin` WRITE;
INSERT INTO `admin` VALUES (1,'admin','admin','admin');
UNLOCK TABLES;

DROP TABLE IF EXISTS `student`;
CREATE TABLE `student` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(20) NOT NULL,
  `sno` varchar(20) NOT NULL,
  `department` varchar(20) NOT NULL,
  `hometown` varchar(20) NOT NULL,
  `mark` varchar(20) NOT NULL,
  `email` varchar(20) NOT NULL,
  `tel` varchar(20) NOT NULL,
  `sex` varchar(20) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=22 DEFAULT CHARSET=utf8;

LOCK TABLES `student` WRITE;
INSERT INTO `student` VALUES (18,'张三','001','信息科学技术学院','辽宁','80','[email protected]','13888888888','男'),(19,'李四','002','理学院','上海','70','[email protected]','13812341234','男'),(20,'王五','003','外国语学院','北京','88','[email protected]','13698765432','女');
UNLOCK TABLES;

3、model——管理员、学生

/**
 * 项目名：student
 * 修改历史：
 */
package com.student.model;

/**
 * 模块说明：admin
 * 
 */
public class Admin {
  private int id;
  private String name;
  private String username;
  private String password;

  public String getName() {
    return name;
  }

  public void setName(String name) {
    this.name = name;
  }

  public int getId() {
    return id;
  }

  public void setId(int id) {
    this.id = id;
  }

  public String getUsername() {
    return username;
  }

  public void setUsername(String username) {
    this.username = username;
  }

  public String getPassword() {
    return password;
  }

  public void setPassword(String password) {
    this.password = password;
  }

}

/**
 * 项目名：student
 * 修改历史：
 */
package com.student.model;

/**
 * 模块说明： 学生
 * 
 */
public class Student {
  private int id;
  private String sno;// 学号
  private String name;
  private String sex;
  private String department;// 院系
  private String homeTown;// 籍贯
  private String mark;// 学分
  private String email;
  private String tel;// 联系方式

  public int getId() {
    return id;
  }

  public void setId(int id) {
    this.id = id;
  }

  public String getSno() {
    return sno;
  }

  public void setSno(String sno) {
    this.sno = sno;
  }

  public String getName() {
    return name;
  }

  public void setName(String name) {
    this.name = name;
  }

  public String getSex() {
    return sex;
  }

  public void setSex(String sex) {
    this.sex = sex;
  }

  public String getDepartment() {
    return department;
  }

  public void setDepartment(String department) {
    this.department = department;
  }

  public String getHomeTown() {
    return homeTown;
  }

  public void setHomeTown(String homeTown) {
    this.homeTown = homeTown;
  }

  public String getMark() {
    return mark;
  }

  public void setMark(String mark) {
    this.mark = mark;
  }

  public String getEmail() {
    return email;
  }

  public void setEmail(String email) {
    this.email = email;
  }

  public String getTel() {
    return tel;
  }

  public void setTel(String tel) {
    this.tel = tel;
  }

}

4、 工具类DBUtil（对jdbc进行封装）

/**
 * 项目名：student
 * 修改历史：
 */
package com.student.util;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import com.student.AppConstants;

/**
 * 模块说明：数据库工具类
 * 
 */
public class DBUtil {
  private static DBUtil db;

  private Connection conn;
  private PreparedStatement ps;
  private ResultSet rs;

  private DBUtil() {

  }

  public static DBUtil getDBUtil() {
    if (db == null) {
      db = new DBUtil();
    }
    return db;
  }

  public int executeUpdate(String sql) {
    int result = -1;
    if (getConn() == null) {
      return result;
    }
    try {
      ps = conn.prepareStatement(sql);
      result = ps.executeUpdate();
    } catch (SQLException e) {
      e.printStackTrace();
    }
    return result;
  }

  public int executeUpdate(String sql, Object[] obj) {
    int result = -1;
    if (getConn() == null) {
      return result;
    }
    try {
      ps = conn.prepareStatement(sql);
      for (int i = 0; i < obj.length; i++) {
        ps.setObject(i + 1, obj[i]);
      }
      result = ps.executeUpdate();
      close();
    } catch (SQLException e) {
      e.printStackTrace();
    }
    return result;
  }

  public ResultSet executeQuery(String sql) {
    if (getConn() == null) {
      return null;
    }
    try {
      ps = conn.prepareStatement(sql);
      rs = ps.executeQuery();
    } catch (SQLException e) {
      e.printStackTrace();
    }
    return rs;
  }

  public ResultSet executeQuery(String sql, Object[] obj) {
    if (getConn() == null) {
      return null;
    }
    try {
      ps = conn.prepareStatement(sql);
      for (int i = 0; i < obj.length; i++) {
        ps.setObject(i + 1, obj[i]);
      }
      rs = ps.executeQuery();
    } catch (SQLException e) {
      e.printStackTrace();
    }

    return rs;
  }

  private Connection getConn() {
    try {
      if (conn == null || conn.isClosed()) {
        Class.forName(AppConstants.JDBC_DRIVER);
        conn = DriverManager.getConnection(AppConstants.JDBC_URL, AppConstants.JDBC_USERNAME,
            AppConstants.JDBC_PASSWORD);
      }
    } catch (ClassNotFoundException e) {
      System.out.println("jdbc driver is not found.");
      e.printStackTrace();
    } catch (SQLException e) {
      e.printStackTrace();
    }
    return conn;
  }

  public void close() {
    try {
      if (rs != null) {
        rs.close();
      }
      if (ps != null) {
        ps.close();
      }
      if (conn != null) {
        conn.close();
      }
    } catch (SQLException e) {
      e.printStackTrace();
    }
  }
}

5、dao：主要调用DBUtil操作相应的model——增删改查

BaseDAO.java

/**
 * 项目名：student
 * 修改历史：
 */
package com.student.base;

import java.sql.ResultSet;
import java.sql.SQLException;

import com.student.DAO;
import com.student.dao.AdminDAO;
import com.student.dao.StudentDAO;
import com.student.util.DBUtil;

/**
 * 模块说明： DAO基类
 * 
 */
public abstract class BaseDAO {
  protected final DBUtil db = DBUtil.getDBUtil();
  protected ResultSet rs;
  private static BaseDAO baseDAO;

  public BaseDAO() {
    init();
  }

  private void init() {
    // buildAbilityDAO();
  }

  // protected abstract void buildAbilityDAO();

  public static synchronized BaseDAO getAbilityDAO(DAO dao) {
    switch (dao) {
    case AdminDAO:
      if (baseDAO == null || baseDAO.getClass() != AdminDAO.class) {
        baseDAO = AdminDAO.getInstance();
      }
      break;
    case StudentDAO:
      if (baseDAO == null || baseDAO.getClass() != StudentDAO.class) {
        baseDAO = StudentDAO.getInstance();
      }
      break;
    default:
      break;
    }
    return baseDAO;
  }

  protected void destroy() {
    try {
      if (rs != null) {
        rs.close();
      }
    } catch (SQLException se) {
      se.printStackTrace();
    } finally {
      db.close();
    }
  }
}

AdminDAO.java

/**
 * 项目名：student
 * 修改历史：
 */
package com.student.dao;

import java.sql.SQLException;

import com.student.base.BaseDAO;

/**
 * 模块说明： 管理员增删改查
 * 
 */
public class AdminDAO extends BaseDAO {

  private static AdminDAO ad = null;

  public static synchronized AdminDAO getInstance() {
    if (ad == null) {
      ad = new AdminDAO();
    }
    return ad;
  }

  public boolean queryForLogin(String username, String password) {
    boolean result = false;
    if (username.length() == 0 || password.length() == 0) {
      return result;
    }
    String sql = "select * from admin where username=? and password=?";
    String[] param = { username, password };
    rs = db.executeQuery(sql, param);
    try {
      if (rs.next()) {
        result = true;
      }
    } catch (SQLException e) {
      e.printStackTrace();
    } finally {
      destroy();
    }
    return result;
  }

}

StudentDAO.java

/**
 * 项目名：student
 * 修改历史：
 */
package com.student.dao;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import com.student.base.BaseDAO;
import com.student.model.Student;

/**
 * 模块说明： 学生增删改查
 * 
 */
public class StudentDAO extends BaseDAO {
  private final int fieldNum = 9;
  private final int showNum = 15;
  private static StudentDAO sd = null;

  public static synchronized StudentDAO getInstance() {
    if (sd == null) {
      sd = new StudentDAO();
    }
    return sd;
  }

  // update
  public boolean update(Student stu) {
    boolean result = false;
    if (stu == null) {
      return result;
    }
    try {
      // check
      if (queryBySno(stu.getSno()) == 0) {
        return result;
      }
      // update
      String sql = "update student set sex=?,department=?,email=?,tel=?,hometown=?,mark=? where name=? and sno=?";
      String[] param = { stu.getSex(), stu.getDepartment(), stu.getEmail(), stu.getTel(), stu.getHomeTown(),
          stu.getMark(), stu.getName(), stu.getSno() };
      int rowCount = db.executeUpdate(sql, param);
      if (rowCount == 1) {
        result = true;
      }
    } catch (SQLException se) {
      se.printStackTrace();
    } finally {
      destroy();
    }
    return result;
  }

  // delete
  public boolean delete(Student stu) {
    boolean result = false;
    if (stu == null) {
      return result;
    }
    String sql = "delete from student where name=? and sno=?";
    String[] param = { stu.getName(), stu.getSno() };
    int rowCount = db.executeUpdate(sql, param);
    if (rowCount == 1) {
      result = true;
    }
    destroy();
    return result;
  }

  // add
  public boolean add(Student stu) {
    boolean result = false;
    if (stu == null) {
      return result;
    }
    try {
      // check
      if (queryBySno(stu.getSno()) == 1) {
        return result;
      }
      // insert
      String sql = "insert into student(name,sno,sex,department,hometown,mark,email,tel) values(?,?,?,?,?,?,?,?)";
      String[] param = { stu.getName(), stu.getSno(), stu.getSex(), stu.getDepartment(), stu.getHomeTown(),
          stu.getMark(), stu.getEmail(), stu.getTel() };
      if (db.executeUpdate(sql, param) == 1) {
        result = true;
      }
    } catch (SQLException se) {
      se.printStackTrace();
    } finally {
      destroy();
    }
    return result;
  }

  // query by name
  public String[][] queryByName(String name) {
    String[][] result = null;
    if (name.length() < 0) {
      return result;
    }
    List stus = new ArrayList();
    int i = 0;
    String sql = "select * from student where name like ?";
    String[] param = { "%" + name + "%" };
    rs = db.executeQuery(sql, param);
    try {
      while (rs.next()) {
        buildList(rs, stus, i);
        i++;
      }
      if (stus.size() > 0) {
        result = new String[stus.size()][fieldNum];
        for (int j = 0; j < stus.size(); j++) {
          buildResult(result, stus, j);
        }
      }
    } catch (SQLException se) {
      se.printStackTrace();
    } finally {
      destroy();
    }

    return result;
  }

  // query
  public String[][] list(int pageNum) {
    String[][] result = null;
    if (pageNum < 1) {
      return result;
    }
    List stus = new ArrayList();
    int i = 0;
    int beginNum = (pageNum - 1) * showNum;
    String sql = "select * from student limit ?,?";
    Integer[] param = { beginNum, showNum };
    rs = db.executeQuery(sql, param);
    try {
      while (rs.next()) {
        buildList(rs, stus, i);
        i++;
      }
      if (stus.size() > 0) {
        result = new String[stus.size()][fieldNum];
        for (int j = 0; j < stus.size(); j++) {
          buildResult(result, stus, j);
        }
      }
    } catch (SQLException se) {
      se.printStackTrace();
    } finally {
      destroy();
    }

    return result;
  }

  // 将rs记录添加到list中
  private void buildList(ResultSet rs, List list, int i) throws SQLException {
    Student stu = new Student();
    stu.setId(i + 1);
    stu.setName(rs.getString("name"));
    stu.setDepartment(rs.getString("department"));
    stu.setEmail(rs.getString("email"));
    stu.setHomeTown(rs.getString("hometown"));
    stu.setMark(rs.getString("mark"));
    stu.setSex(rs.getString("sex"));
    stu.setSno(rs.getString("sno"));
    stu.setTel(rs.getString("tel"));
    list.add(stu);
  }

  // 将list中记录添加到二维数组中
  private void buildResult(String[][] result, List stus, int j) {
    Student stu = stus.get(j);
    result[j][0] = String.valueOf(stu.getId());
    result[j][1] = stu.getName();
    result[j][2] = stu.getSno();
    result[j][3] = stu.getSex();
    result[j][4] = stu.getDepartment();
    result[j][5] = stu.getHomeTown();
    result[j][6] = stu.getMark();
    result[j][7] = stu.getEmail();
    result[j][8] = stu.getTel();
  }

  // query by sno
  private int queryBySno(String sno) throws SQLException {
    int result = 0;
    if ("".equals(sno) || sno == null) {
      return result;
    }
    String checkSql = "select * from student where sno=?";
    String[] checkParam = { sno };
    rs = db.executeQuery(checkSql, checkParam);
    if (rs.next()) {
      result = 1;
    }
    return result;
  }

}

6、 view：与用户交互的界面（包括LoginView.java、MainView.java、AddView.java、DeleteView.java、UpdateView.java），主要使用DAO提供的接口，由于篇幅原因，仅列出MainView即首页。

/**
 * 项目名：student
 * 修改历史：
 */
package com.student.view;

import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;

import com.student.AppConstants;
import com.student.DAO;
import com.student.base.BaseDAO;
import com.student.dao.StudentDAO;

/**
 * 模块说明： 首页
 * 
 */
public class MainView extends JFrame {

  private static final long serialVersionUID = 5870864087464173884L;

  private final int maxPageNum = 99;

  private JPanel jPanelNorth, jPanelSouth, jPanelCenter;
  private JButton jButtonFirst, jButtonLast, jButtonNext, jButtonPre, jButtonAdd, jButtonDelete, jButtonUpdate,
      jButtonFind;
  private JLabel currPageNumJLabel;
  private JTextField condition;
  public static JTable jTable;
  private JScrollPane jScrollPane;
  private DefaultTableModel myTableModel;

  public static String[] column = { "id", AppConstants.STUDENT_NAME, AppConstants.STUDENT_SNO,
      AppConstants.STUDENT_SEX, AppConstants.STUDENT_DEPARTMETN, AppConstants.STUDENT_HOMETOWN,
      AppConstants.STUDENT_MARK, AppConstants.STUDENT_EMAIL, AppConstants.STUDENT_TEL };
  public static int currPageNum = 1;

  public MainView() {
    init();
  }

  private void init() {
    setTitle(AppConstants.MAINVIEW_TITLE);

    // north panel
    jPanelNorth = new JPanel();
    jPanelNorth.setLayout(new GridLayout(1, 5));
    condition = new JTextField(AppConstants.PARAM_FIND_CONDITION);
    condition.addKeyListener(new FindListener());
    jPanelNorth.add(condition);
    // query by name
    jButtonFind = new JButton(AppConstants.PARAM_FIND);
    jButtonFind.addActionListener(new ActionListener() {
      @Override
      public void actionPerformed(ActionEvent e) {
        find();
      }
    });
    jButtonFind.addKeyListener(new FindListener());
    // add
    jPanelNorth.add(jButtonFind);
    jButtonAdd = new JButton(AppConstants.PARAM_ADD);
    jButtonAdd.addActionListener(new ActionListener() {
      @Override
      public void actionPerformed(ActionEvent e) {
        new AddView();
      }
    });
    jPanelNorth.add(jButtonAdd);
    // delete
    jButtonDelete = new JButton(AppConstants.PARAM_DELETE);
    jButtonDelete.addActionListener(new ActionListener() {
      @Override
      public void actionPerformed(ActionEvent e) {
        new DeleteView();
      }
    });
    jPanelNorth.add(jButtonDelete);
    // update
    jButtonUpdate = new JButton(AppConstants.PARAM_UPDATE);
    jButtonUpdate.addActionListener(new ActionListener() {
      @Override
      public void actionPerformed(ActionEvent e) {
        new UpdateView();
      }
    });
    jPanelNorth.add(jButtonUpdate);

    // center panel
    jPanelCenter = new JPanel();
    jPanelCenter.setLayout(new GridLayout(1, 1));

    // init jTable
    String[][] result = ((StudentDAO) BaseDAO.getAbilityDAO(DAO.StudentDAO)).list(currPageNum);
    myTableModel = new DefaultTableModel(result, column);
    jTable = new JTable(myTableModel);
    DefaultTableCellRenderer cr = new DefaultTableCellRenderer();
    cr.setHorizontalAlignment(JLabel.CENTER);
    jTable.setDefaultRenderer(Object.class, cr);
    initJTable(jTable, result);

    jScrollPane = new JScrollPane(jTable);
    jPanelCenter.add(jScrollPane);

    // south panel
    jPanelSouth = new JPanel();
    jPanelSouth.setLayout(new GridLayout(1, 5));

    jButtonFirst = new JButton(AppConstants.MAINVIEW_FIRST);
    jButtonFirst.addActionListener(new ActionListener() {
      @Override
      public void actionPerformed(ActionEvent e) {
        currPageNum = 1;
        String[][] result = ((StudentDAO) BaseDAO.getAbilityDAO(DAO.StudentDAO)).list(currPageNum);
        initJTable(jTable, result);
        currPageNumJLabel.setText(AppConstants.MAINVIEW_PAGENUM_JLABEL_DI + currPageNum
            + AppConstants.MAINVIEW_PAGENUM_JLABEL_YE);
      }
    });
    jButtonPre = new JButton(AppConstants.MAINVIEW_PRE);
    jButtonPre.addActionListener(new ActionListener() {

      @Override
      public void actionPerformed(ActionEvent e) {
        currPageNum--;
        if (currPageNum <= 0) {
          currPageNum = 1;
        }
        String[][] result = ((StudentDAO) BaseDAO.getAbilityDAO(DAO.StudentDAO)).list(currPageNum);
        initJTable(jTable, result);
        currPageNumJLabel.setText(AppConstants.MAINVIEW_PAGENUM_JLABEL_DI + currPageNum
            + AppConstants.MAINVIEW_PAGENUM_JLABEL_YE);
      }
    });
    jButtonNext = new JButton(AppConstants.MAINVIEW_NEXT);
    jButtonNext.addActionListener(new ActionListener() {
      @Override
      public void actionPerformed(ActionEvent e) {
        currPageNum++;
        if (currPageNum > maxPageNum) {
          currPageNum = maxPageNum;
        }
        String[][] result = ((StudentDAO) BaseDAO.getAbilityDAO(DAO.StudentDAO)).list(currPageNum);
        initJTable(jTable, result);
        currPageNumJLabel.setText(AppConstants.MAINVIEW_PAGENUM_JLABEL_DI + currPageNum
            + AppConstants.MAINVIEW_PAGENUM_JLABEL_YE);
      }
    });
    jButtonLast = new JButton(AppConstants.MAINVIEW_LAST);
    jButtonLast.addActionListener(new ActionListener() {
      @Override
      public void actionPerformed(ActionEvent e) {
        currPageNum = maxPageNum;
        String[][] result = ((StudentDAO) BaseDAO.getAbilityDAO(DAO.StudentDAO)).list(currPageNum);
        initJTable(jTable, result);
        currPageNumJLabel.setText(AppConstants.MAINVIEW_PAGENUM_JLABEL_DI + currPageNum
            + AppConstants.MAINVIEW_PAGENUM_JLABEL_YE);
      }
    });

    currPageNumJLabel = new JLabel(
        AppConstants.MAINVIEW_PAGENUM_JLABEL_DI + currPageNum + AppConstants.MAINVIEW_PAGENUM_JLABEL_YE);
    currPageNumJLabel.setHorizontalAlignment(JLabel.CENTER);

    jPanelSouth.add(jButtonFirst);
    jPanelSouth.add(jButtonPre);
    jPanelSouth.add(currPageNumJLabel);
    jPanelSouth.add(jButtonNext);
    jPanelSouth.add(jButtonLast);

    this.add(jPanelNorth, BorderLayout.NORTH);
    this.add(jPanelCenter, BorderLayout.CENTER);
    this.add(jPanelSouth, BorderLayout.SOUTH);

    setBounds(400, 200, 750, 340);
    setResizable(false);
    setDefaultCloseOperation(DISPOSE_ON_CLOSE);
    setVisible(true);
  }

  public static void initJTable(JTable jTable, String[][] result) {
    ((DefaultTableModel) jTable.getModel()).setDataVector(result, column);
    jTable.setRowHeight(20);
    TableColumn firsetColumn = jTable.getColumnModel().getColumn(0);
    firsetColumn.setPreferredWidth(30);
    firsetColumn.setMaxWidth(30);
    firsetColumn.setMinWidth(30);
    TableColumn secondColumn = jTable.getColumnModel().getColumn(1);
    secondColumn.setPreferredWidth(60);
    secondColumn.setMaxWidth(60);
    secondColumn.setMinWidth(60);
    TableColumn thirdColumn = jTable.getColumnModel().getColumn(2);
    thirdColumn.setPreferredWidth(90);
    thirdColumn.setMaxWidth(90);
    thirdColumn.setMinWidth(90);
    TableColumn fourthColumn = jTable.getColumnModel().getColumn(3);
    fourthColumn.setPreferredWidth(30);
    fourthColumn.setMaxWidth(30);
    fourthColumn.setMinWidth(30);
    TableColumn seventhColumn = jTable.getColumnModel().getColumn(6);
    seventhColumn.setPreferredWidth(30);
    seventhColumn.setMaxWidth(30);
    seventhColumn.setMinWidth(30);
    TableColumn ninthColumn = jTable.getColumnModel().getColumn(8);
    ninthColumn.setPreferredWidth(90);
    ninthColumn.setMaxWidth(90);
    ninthColumn.setMinWidth(90);
  }

  private class FindListener extends KeyAdapter {

    @Override
    public void keyPressed(KeyEvent e) {
      if (e.getKeyCode() == KeyEvent.VK_ENTER) {
        find();
      }
    }
  }

  private void find() {
    currPageNum = 0;
    String param = condition.getText();
    if ("".equals(param) || param == null) {
      initJTable(MainView.jTable, null);
      currPageNumJLabel.setText(AppConstants.MAINVIEW_FIND_JLABEL);
      return;
    }
    String[][] result = ((StudentDAO) BaseDAO.getAbilityDAO(DAO.StudentDAO)).queryByName(param);
    condition.setText("");
    initJTable(MainView.jTable, result);
    currPageNumJLabel.setText(AppConstants.MAINVIEW_FIND_JLABEL);
  }

}

PS：如果觉得我的分享不错，欢迎大家随手点赞、转发。

原文：blog.csdn.net/ZhuangM_888/article/details/50476423

Java团长

专注于Java干货分享

扫描上方二维码获取更多Java干货