目录
一、系统介绍
1.运行环境
2.技术说明
3.系统功能
4.数据库实体E-R图设计
5.数据库表的设计
二、系统实现
1.用户登录
2.主界面
3.数据库连接
4.数据查询
6.添加学生信息
7.修改学生信息
三、部分代码
1.ChangePwd.java
2.Login.java
3.Main.java
5.备注
开发工具:Eclipse/IDEA
JDK版本:jdk1.8
Mysql版本:5.7
Java+Swing+Mysql
主要功能包括 1.管理学生信息,其中包括添加,删除,修改等操作。2.管理课程信息,其中包括添加,删除,修改等操作。3.管理选课信息,其中包括添加,删除,修改等操作。4.查询信息,其中包括查询学生信息,查询课程信息,查询选课信息等操作
学生管理实体E-R图
课程管理实体E-R图
选课管理实体E-R图
数据库名:user
管理员表(user)
列名 | 数据类型 | 长度 | 是否为空 |
uno | int | 11 | 否 |
name | varchar | 10 | 否 |
password | varchar | 10 | 否 |
数据库名:stu
学生表(stu)
列名 | 数据类型 | 长度 | 是否为空 |
sno | Int | 11 | 否 |
name | varchar | 10 | 否 |
sex | varchar | 10 | 否 |
age | int | 10 | 是 |
sdept | varchar | 10 | 是 |
数据库名:course
课程表(course)
列名 | 数据类型 | 长度 | 是否为空 |
cno | char | 4 | 否 |
cname | varchar | 10 | 否 |
credit | Int | 10 | 是 |
数据库名:sc
选课表(sc)
列名 | 数据类型 | 长度 | 是否为空 |
sno | char | 11 | 否 |
cno | char | 4 | 否 |
score | Int | 10 | 是 |
根据需求分析阶段得到的功能需求,可将系统功能大概分为六个模块:这几个模块用户登录、学生管理、课程管理、选课管理、查询管理、系统退出
系统数据流程图
public void actionPerformed(ActionEvent e) { if (e.getActionCommand().equals("登录")) { try { DBUtil.initst(); String stuname=nameField.getText(); String stupwd=passwordField.getText(); //根据数据库表中的用户名查密码进行匹配 DBUtil.rs=DBUtil.st.executeQuery("select password from user where name='"+stuname+"'"); if (DBUtil.rs.next()) { if (DBUtil.rs.getString(1).equals(stupwd)) { //如果密码正确就显示主页面 this.hide(); new Main().show(); } else { //如果密码错误弹出框 JOptionPane.showMessageDialog(null, "密码错误,请联系管理员");} }else { //姓名不对弹出提示框 JOptionPane.showMessageDialog(null, "用户不存在"); } DBUtil.closeDB(); } catch (SQLException ex) { ex.printStackTrace(); } }else {System.exit(0)} }
主界面主要是用于对选择相应的功能进行相应的功能,主界面主要包括学生管理、课程管理、选课管理、数据查询、系统退出五大功能。 主界面添加JMenuBar菜单条,和JMenu菜单,和JMenuItem菜单项。三个菜单包括:学生管理、课程管理、选课管理和数据查询。学生管理中包括:增加学生、修改学生、删除学生。课程管理中包括:增加课程、修改课程、删除课程。选课管理中包括:增加选课、修改选课、删除选课。数据查询主要包括学生查询、课程查询、选课查询。还有一个单独的系统退出。
重要代码:
// 学生表 JTable jTable = new JTable(); jTable.setModel(userModel); JScrollPane jScrollPane = new JScrollPane(); jScrollPane.setViewportView(jTable); add(jScrollPane, BorderLayout.CENTER); // 菜单栏 JMenuBar menuBar = new JMenuBar(); setJMenuBar(menuBar); // 学生信息菜单栏 JMenu user = new JMenu(" 学生管理 "); menuBar.add(user); JMenuItem addstu = new JMenuItem("增加学生"); JMenuItem updatestu = new JMenuItem("修改学生"); JMenuItem deletestu = new JMenuItem("删除学生"); user.add(addstu); user.add(updatestu); user.add(deletestu); // 系统退出 JLabel exit = new JLabel(" 系统退出"); exit.setForeground(Color.red); exit.setFont(new java.awt.Font("宋体", 1, 15)); menuBar.add(exit); // 查询区 JPanel jPaneln = new JPanel(); JLabel nameJLabel = new JLabel("学号/课程号:"); JTextField nameField = new JTextField(20); JButton selectbtn = new JButton("查询"); jPaneln.add(nameJLabel); jPaneln.add(nameField); jPaneln.add(selectbtn); add(jPaneln, BorderLayout.NORTH); // 查询学号/课程号按钮 selectbtn.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub String stu = nameField.getText(); String sql = "select * from stu where sno='" + stu + "'"; userModel.reload(sql); String sql1 = "select * from course where cno='" + stu + "'"; coursemodel.reload(sql1); String sql2 = "SELECT sc.sno,stu.name,sc.cno,course.cname,credit,score FROM sc,stu,course where sc.sno=stu.sno and course.cno=sc.cno and sc.sno='"+ stu + "'"; selectsmodel.reload(sql2);}});
学生、课程以及成绩的增删改查都是建立在连接数据库的基础之上,在MySQL里建立用户管理员表、学生表、课程表、选课表等。建立JDBC数据源的连接。
连接数据库重要代码:
public class DBUtil { static Connection con; public static Statement st; static PreparedStatement ps; public static ResultSet rs; static String url="jdbc:mysql://localhost:3306/studb?useUnicode=true&characterEncoding=UTF-8"; static String name="root"; static String pwd="123456"; public static void initst() { try { Class.forName("com.mysql.jdbc.Driver"); con=DriverManager.getConnection(url,name,pwd); st=con.createStatement(); } catch (SQLException e) { e.printStackTrace(); }catch (ClassNotFoundException e) { e.printStackTrace(); } } public static void initps(String sql) { try { Class.forName("com.mysql.jdbc.Driver"); con=DriverManager.getConnection(url,name,pwd); ps=con.prepareStatement(sql); rs= ps.executeQuery(); } catch (SQLException e) { e.printStackTrace(); }catch (ClassNotFoundException e) { e.printStackTrace(); } } public static void closeDB() { try { if (rs!=null) { rs.close(); } if (ps!=null) { ps.close(); } if (st!=null) { st.close(); } if (con!=null) { con.close(); } } catch (Exception e) { // TODO: handle exception e.printStackTrace();
重要代码:
/* * 查询管理 */ // 查询所有学生信息 querystu.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub // 刷新jTable并把jTable显示出来 userModel.reload(null); jTable.setModel(userModel); } }); // 查询所有课程信息 querycourse.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub // 刷新jTable并把jTable显示出来 coursemodel.reload(null); jTable.setModel(coursemodel); } }); // 查询所有学生选课信息 queryselect.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub // 刷新jTable并把jTable显示出来 selectsmodel.reload(null); jTable.setModel(selectsmodel); } });
添加学生信息主要代码:
public void actionPerformed(ActionEvent e) { if (e.getActionCommand().equals("确定")) { try { DBUtil.initst(); String sno=snoField.getText(); String stuname=nameField.getText(); String sex=sexField.getText(); String age=ageField.getText(); String sdept=sdeptField.getText(); int n=DBUtil.st.executeUpdate("insert into stu values('"+sno+"','"+stuname+"','"+sex+"','"+age+"','"+sdept+"')"); if (n>0) { JOptionPane.showMessageDialog(null, "添加成功"); } else { JOptionPane.showMessageDialog(null, "添加失败"); } DBUtil.closeDB(); } catch (SQLException ex) { ex.printStackTrace(); } DBUtil.closeDB(); }else { this.hide(); UserModel.reload(null); } }
这部分的主要功能是更改数据库中学生的基本信息。查询出学生表,点击表中的某一行进行选中,再点击学生信息菜单栏的修改学生信息就可以进行修改
修改学生信息:
package body; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.sql.SQLException; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPasswordField; import javax.swing.JTextField; public class ChangePwd extends JFrame implements ActionListener { JTextField nameField; JPasswordField passwordField; public ChangePwd() { setTitle("修改密码"); setLayout(null); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setBounds(500,200,350,300); JLabel nameJLabel=new JLabel("账号"); nameField=new JTextField(); JLabel passJLabel=new JLabel("密码"); passwordField=new JPasswordField(); nameJLabel.setBounds(50,15,100,100); nameField.setBounds(100,50,200,30); passJLabel.setBounds(50,70,100,100); passwordField.setBounds(100,100,200,30); JButton loginButton=new JButton("确定"); JButton cancelButton=new JButton("取消"); loginButton.setBounds(100,150,80,30); cancelButton.setBounds(200,150,80,30); add(nameJLabel); add(nameField); add(passJLabel); add(passwordField); add(loginButton); add(cancelButton); loginButton.setActionCommand("登录"); cancelButton.setActionCommand("取消"); loginButton.addActionListener(this); cancelButton.addActionListener(this); setVisible(true); } @Override public void actionPerformed(ActionEvent e) { if (e.getActionCommand().equals("登录")) { try { DBUtil.initst(); String stuname=nameField.getText(); String stupwd=passwordField.getText(); int n=DBUtil.st.executeUpdate("update user set password='"+stupwd+"' where name='"+stuname+"'"); if (n>0) { JOptionPane.showMessageDialog(null, "修改成功"); } else { JOptionPane.showMessageDialog(null, "修改失败"); } DBUtil.closeDB(); } catch (SQLException ex) { ex.printStackTrace(); } }else { this.hide(); new Login().show(); } } public static void main(String[] args) { ChangePwd changePwd=new ChangePwd(); } }
package body; import java.awt.Graphics; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.sql.SQLException; import javax.swing.ImageIcon; 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 Login extends JFrame implements ActionListener { JTextField nameField; JPasswordField passwordField; public Login() { JPanel panel = new ImagePanel(); add(panel); panel.setLayout(null); setTitle("系统登录"); setLayout(null); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setBounds(500,200,350,300); //添加账号密码文本及文本框 JLabel nameJLabel=new JLabel("账号"); nameField=new JTextField(); JLabel passJLabel=new JLabel("密码"); passwordField=new JPasswordField(); nameJLabel.setBounds(50,15,100,100); nameField.setBounds(100,50,200,30); passJLabel.setBounds(50,70,100,100); passwordField.setBounds(100,100,200,30); //登录取消按钮 JButton loginButton=new JButton("登录"); JButton cancelButton=new JButton("取消"); loginButton.setBounds(50,150,80,30); cancelButton.setBounds(220,150,80,30); //添加到面版 add(nameJLabel); add(nameField); add(passJLabel); add(passwordField); add(loginButton); add(cancelButton); //给登录取消按钮添加控件 loginButton.setActionCommand("登录"); cancelButton.setActionCommand("取消"); loginButton.addActionListener(this); cancelButton.addActionListener(this); setVisible(true); } @Override public void actionPerformed(ActionEvent e) { if (e.getActionCommand().equals("登录")) { try { DBUtil.initst(); String stuname=nameField.getText(); String stupwd=passwordField.getText(); //根据数据库表中的用户名查密码进行匹配 DBUtil.rs=DBUtil.st.executeQuery("select password from user where name='"+stuname+"'"); if (DBUtil.rs.next()) { if (DBUtil.rs.getString(1).equals(stupwd)) { //如果密码正确就显示主页面 this.hide(); new Main().show(); } else { //如果密码错误弹出框 JOptionPane.showMessageDialog(null, "密码错误,请联系管理员"); } }else { //姓名不对弹出提示框 JOptionPane.showMessageDialog(null, "用户不存在"); } DBUtil.closeDB(); } catch (SQLException ex) { ex.printStackTrace(); } }else { System.exit(0); } } class ImagePanel extends JPanel { protected void paintComponent(Graphics g) { super.paintComponent(g); ImageIcon icon = new ImageIcon("icon/1.jpg"); g.drawImage(icon.getImage(), 0, 0, null); } } public static void main(String[] args) { Login login=new Login(); } }
package body; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Font; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import java.sql.SQLException; import java.util.Vector; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.JTextField; import course.AddCourse; import course.CourseModel; import course.UpdateCourse; import selects.AddSelect; import selects.SelectsModel; import selects.UpdateSelect; import stu.AddStu; import stu.UpdateStu; import stu.UserModel; public class Main extends JFrame { public static UserModel userModel; public static CourseModel coursemodel; public static SelectsModel selectsmodel; JTextField exit; public Main() { setTitle("学生选课管理系统"); setBounds(300, 100, 1000, 800); String sql = "select * from stu"; userModel = new UserModel(); userModel.init(sql); String sql1 = "select * from course"; coursemodel = new CourseModel(); coursemodel.init(sql1); String sql2 = "SELECT sc.sno,stu.name,sc.cno,course.cname,credit,score FROM sc,stu,course where sc.sno=stu.sno and course.cno=sc.cno"; selectsmodel = new SelectsModel(); selectsmodel.init(sql2); // 学生表 JTable jTable = new JTable(); jTable.setModel(userModel); JScrollPane jScrollPane = new JScrollPane(); jScrollPane.setViewportView(jTable); add(jScrollPane, BorderLayout.CENTER); // 菜单栏 JMenuBar menuBar = new JMenuBar(); setJMenuBar(menuBar); // 学生信息菜单栏 JMenu user = new JMenu(" 学生管理 "); menuBar.add(user); JMenuItem addstu = new JMenuItem("增加学生"); JMenuItem updatestu = new JMenuItem("修改学生"); JMenuItem deletestu = new JMenuItem("删除学生"); user.add(addstu); user.add(updatestu); user.add(deletestu); // 课程管理菜单栏 JMenu course = new JMenu(" 课程管理 "); menuBar.add(course); JMenuItem addcourse = new JMenuItem("增加课程"); JMenuItem updatecourse = new JMenuItem("修改课程"); JMenuItem deletecourse = new JMenuItem("删除课程"); course.add(addcourse); course.add(updatecourse); course.add(deletecourse); // 选课管理菜单栏 JMenu select = new JMenu(" 选课管理 "); menuBar.add(select); JMenuItem addselect = new JMenuItem("添加选课"); JMenuItem updateselect = new JMenuItem("修改选课"); JMenuItem deleteselect = new JMenuItem("删除选课"); select.add(addselect); select.add(updateselect); select.add(deleteselect); // 查询管理菜单栏 JMenu query = new JMenu(" 查询管理 "); menuBar.add(query); JMenuItem querystu = new JMenuItem("查询所有学生"); JMenuItem querycourse = new JMenuItem("查询所有课程"); JMenuItem queryselect = new JMenuItem("查询所有选课"); query.add(querystu); query.add(querycourse); query.add(queryselect); // 系统退出 JLabel exit = new JLabel(" 系统退出"); exit.setForeground(Color.red); exit.setFont(new java.awt.Font("宋体", 1, 15)); menuBar.add(exit); // 查询区 JPanel jPaneln = new JPanel(); JLabel nameJLabel = new JLabel("学号/课程号:"); JTextField nameField = new JTextField(20); JButton selectbtn = new JButton("查询"); jPaneln.add(nameJLabel); jPaneln.add(nameField); jPaneln.add(selectbtn); add(jPaneln, BorderLayout.NORTH); // 查询学号/课程号按钮 selectbtn.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub String stu = nameField.getText(); String sql = "select * from stu where sno='" + stu + "'"; userModel.reload(sql); String sql1 = "select * from course where cno='" + stu + "'"; coursemodel.reload(sql1); String sql2 = "SELECT sc.sno,stu.name,sc.cno,course.cname,credit,score FROM sc,stu,course where sc.sno=stu.sno and course.cno=sc.cno and sc.sno='" + stu + "'"; selectsmodel.reload(sql2); } }); /* * 学生管理 */ // 增加学生信息 addstu.addMouseListener(new MouseListener() { @Override public void mouseReleased(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mousePressed(MouseEvent e) { // TODO Auto-generated method stub new AddStu().show(); } @Override public void mouseExited(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseEntered(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseClicked(MouseEvent e) { // TODO Auto-generated method stub } }); // 删除学生信息 deletestu.addMouseListener(new MouseListener() { @Override public void mouseReleased(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mousePressed(MouseEvent e) { // TODO Auto-generated method stub int index = jTable.getSelectedRow(); if (index == -1) { JOptionPane.showMessageDialog(null, "未选中"); } else { Object user = userModel.rowData.get(index); String sno = ((Vector) user).get(0).toString(); try { DBUtil.initst(); int n = DBUtil.st.executeUpdate("delete from stu where sno='" + sno + "'"); if (n > 0) { JOptionPane.showMessageDialog(null, "删除成功"); } else { JOptionPane.showMessageDialog(null, "删除失败"); } UserModel.reload(null); DBUtil.closeDB(); } catch (SQLException ex) { ex.printStackTrace(); } } } @Override public void mouseExited(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseEntered(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseClicked(MouseEvent e) { // TODO Auto-generated method stub } }); // 修改学生信息 updatestu.addMouseListener(new MouseListener() { @Override public void mouseReleased(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mousePressed(MouseEvent e) { // TODO Auto-generated method stub int index = jTable.getSelectedRow(); if (index == -1) { JOptionPane.showMessageDialog(null, "未选中"); } else { Object user = userModel.rowData.get(index); new UpdateStu(user).show(); } } @Override public void mouseExited(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseEntered(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseClicked(MouseEvent e) { // TODO Auto-generated method stub } }); /* * 课程管理 */ // 增加课程信息 addcourse.addMouseListener(new MouseListener() { @Override public void mouseReleased(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mousePressed(MouseEvent e) { // TODO Auto-generated method stub new AddCourse().show(); } @Override public void mouseExited(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseEntered(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseClicked(MouseEvent e) { // TODO Auto-generated method stub } }); // 删除课程信息 deletecourse.addMouseListener(new MouseListener() { @Override public void mouseReleased(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mousePressed(MouseEvent e) { // TODO Auto-generated method stub int index = jTable.getSelectedRow(); if (index == -1) { JOptionPane.showMessageDialog(null, "未选中"); } else { Object course = coursemodel.rowData1.get(index); String cno = ((Vector) course).get(0).toString(); try { DBUtil.initst(); int n = DBUtil.st.executeUpdate("delete from course where cno='" + cno + "'"); if (n > 0) { JOptionPane.showMessageDialog(null, "删除成功"); } else { JOptionPane.showMessageDialog(null, "删除失败"); } CourseModel.reload(null); DBUtil.closeDB(); } catch (SQLException ex) { ex.printStackTrace(); } } } @Override public void mouseExited(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseEntered(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseClicked(MouseEvent e) { // TODO Auto-generated method stub } }); // 修改课程信息 updatecourse.addMouseListener(new MouseListener() { @Override public void mouseReleased(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mousePressed(MouseEvent e) { // TODO Auto-generated method stub int index = jTable.getSelectedRow(); if (index == -1) { JOptionPane.showMessageDialog(null, "未选中"); } else { Object course = coursemodel.rowData1.get(index); new UpdateCourse(course).show(); } } @Override public void mouseExited(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseEntered(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseClicked(MouseEvent e) { // TODO Auto-generated method stub } }); /* * 学生选课管理 */ // 增加学生选课信息 addselect.addMouseListener(new MouseListener() { @Override public void mouseReleased(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mousePressed(MouseEvent e) { // TODO Auto-generated method stub new AddSelect().show(); } @Override public void mouseExited(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseEntered(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseClicked(MouseEvent e) { // TODO Auto-generated method stub } }); // 删除学生选课信息 deleteselect.addMouseListener(new MouseListener() { @Override public void mouseReleased(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mousePressed(MouseEvent e) { // TODO Auto-generated method stub int index = jTable.getSelectedRow(); if (index == -1) { JOptionPane.showMessageDialog(null, "未选中"); } else { Object select = selectsmodel.rowData2.get(index); String sno = ((Vector) select).get(0).toString(); try { DBUtil.initst(); int n = DBUtil.st.executeUpdate("delete from sc where sno='" + sno + "'"); if (n > 0) { JOptionPane.showMessageDialog(null, "删除成功"); } else { JOptionPane.showMessageDialog(null, "删除失败"); } SelectsModel.reload(null); DBUtil.closeDB(); } catch (SQLException ex) { ex.printStackTrace(); } } } @Override public void mouseExited(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseEntered(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseClicked(MouseEvent e) { // TODO Auto-generated method stub } }); // 修改学生选课信息 updateselect.addMouseListener(new MouseListener() { @Override public void mouseReleased(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mousePressed(MouseEvent e) { // TODO Auto-generated method stub int index = jTable.getSelectedRow(); if (index == -1) { JOptionPane.showMessageDialog(null, "未选中"); } else { Object select = selectsmodel.rowData2.get(index); new UpdateSelect(select).show(); } } @Override public void mouseExited(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseEntered(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseClicked(MouseEvent e) { // TODO Auto-generated method stub } }); /* * 查询管理 */ // 查询所有学生信息 querystu.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub // 刷新jTable并把jTable显示出来 userModel.reload(null); jTable.setModel(userModel); } }); // 查询所有课程信息 querycourse.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub // 刷新jTable并把jTable显示出来 coursemodel.reload(null); // jTable.show(); jTable.setModel(coursemodel); } }); // 查询所有学生选课信息 queryselect.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub // 刷新jTable并把jTable显示出来 selectsmodel.reload(null); // jTable.show(); jTable.setModel(selectsmodel); } }); /* * 系统退出 */ exit.addMouseListener(new MouseListener() { public void mouseClicked(MouseEvent e) { System.exit(0); // 处理鼠标点击 } public void mouseEntered(MouseEvent e) { // 处理鼠标移入 } public void mouseExited(MouseEvent e) { // 处理鼠标离开 } public void mousePressed(MouseEvent e) { // 处理鼠标按下 } public void mouseReleased(MouseEvent e) { // 处理鼠标释放 } }); setVisible(true); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } public static void main(String[] args) { Main main = new Main(); } }
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