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云代码 - java代码库

学生成绩管理系统 java桌面版

2013-07-11 作者： 免费源代码下载整理举报

[java]代码库

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/**
 * @(#)StudentSystem.java
 *
 *
 * @author
 * @version 1.00 2012/10/31
 */
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.sql.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.sql.*;
import javax.swing.table.JTableHeader;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.sql.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.sql.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.sql.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.sql.*;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.JTableHeader;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.sql.*;
 
class AddForm extends JFrame implements ActionListener {
    JLabel labName = new JLabel("学号：");
    JLabel labDate = new JLabel("出生日期：");
    JLabel labScore = new JLabel("成绩：");
    JTextField txtName = new JTextField(20);
    JTextField txtDate = new JTextField(18);
    JTextField txtScore = new JTextField(20);
    JButton btnOk = new JButton("确定");
    JButton btnClear = new JButton("清空");
    JPanel pan = new JPanel();
    JPanel pan1 = new JPanel();
    JPanel pan2 = new JPanel();
    JPanel pan3 = new JPanel();
    JPanel pan4 = new JPanel();
 
    Connection cnn;
    Statement stm;
    ResultSet rs;
 
    AddForm() {
        super("添加数据");
        setSize(400, 300);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        pan.setBorder(BorderFactory.createEtchedBorder());
        pan1.add(labName);
        pan1.add(txtName);
        pan2.add(labDate);
        pan2.add(txtDate);
        pan3.add(labScore);
        pan3.add(txtScore);
        pan4.add(btnOk);
        pan4.add(btnClear);
        pan.setLayout(new GridLayout(3, 1));
        pan.add(pan1);
        pan.add(pan2);
        pan.add(pan3);
        getContentPane().add(pan, "Center");
        getContentPane().add(pan4, "South");
        btnOk.addActionListener(this);
        btnClear.addActionListener(this);
        setVisible(true);
        txtName.requestFocus();
 
    }
 
    public void actionPerformed(ActionEvent ae) {
        if (ae.getSource() == btnClear) {
            txtName.setText("");
            txtDate.setText("");
            txtScore.setText("");
            txtName.requestFocus();
        } else if (ae.getSource() == btnOk) {
            String strName = txtName.getText();
            String strDate = txtDate.getText();
            String strScore = txtScore.getText();
            if (strName.equals(""))
                JOptionPane.showMessageDialog(this, "学号不能为空！", "警告",
                        JOptionPane.ERROR_MESSAGE);
            else if (strDate.equals(""))
                JOptionPane.showMessageDialog(this, "出生日期不能为空！", "警告",
                        JOptionPane.ERROR_MESSAGE);
            else if (strScore.equals(""))
                JOptionPane.showMessageDialog(this, "成绩不能为空！", "警告",
                        JOptionPane.ERROR_MESSAGE);
            else {
                try {
                    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
                } catch (ClassNotFoundException ex) {
                    ex.printStackTrace();
                }
                try {
                    cnn = DriverManager.getConnection("Jdbc:Odbc:MyDB");
                    stm = cnn.createStatement();
                } catch (SQLException ex) {
                    ex.printStackTrace();
                }
                try {
                    rs = stm.executeQuery("select * from 成绩表 where 学号='"
                            + strName + "'");
                    if (rs.next()) {
                        JOptionPane.showMessageDialog(this, "对不起，该成绩信息已存在！");
                    } else // 否则插入记录
                    {
                        // System.out.println("insert into 成绩表 values('"+strName+"',#"+strDate+"#,"+strScore+")");
                        stm.executeUpdate("insert into 成绩表 values('" + strName
                                + "','" + strDate + "'," + strScore + ")");
                        JOptionPane.showMessageDialog(null, "记录已经成功添加！");
                    }
                    // 断开连接
                    stm.close();
                    cnn.close();
                } catch (SQLException ex) {
                    System.out.println("SQLException:" + ex.getMessage());
                }
 
            }
        }
    }
 
    public static void main(String[] args) {
        new AddForm();
    }
}
 
class BrowseForm extends JFrame {
    String[] str = { "学号", "出生日期", "成绩" };
    Object[][] data;
    JTable table;
    JTableHeader head;
    JScrollPane jsp;
    Connection conn;
    Statement stmt;
    ResultSet rs;
 
    BrowseForm() {
        super("浏览数据");
        setSize(400, 300);
        int i = 0, j = 0;
        int row;
        try {
            Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
            conn = DriverManager.getConnection("jdbc:odbc:MyDB", "", "");
            stmt = conn.createStatement();
 
            rs = stmt.executeQuery("select COUNT(*) as a from 成绩表");
            rs.next();
            row = rs.getInt("a");
            rs.close();
            data = new Object[row][3];
            rs = stmt.executeQuery("select * from 成绩表");
            while (rs.next()) {
                data[i][j++] = rs.getString("学号");
                data[i][j++] = rs.getDate("出生日期");
                data[i][j] = new Integer(rs.getInt("成绩"));
                i++;
                j = 0;
            }
            table = new JTable(data, str);
            head = table.getTableHeader();
            jsp = new JScrollPane(table);
            getContentPane().add(head, "North");
            getContentPane().add(jsp, "Center");
            rs.close();
            stmt.close();
            conn.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        setVisible(true);
    }
 
    public static void main(String[] args) {
        new BrowseForm();
    }
}
 
class DeleteForm extends JFrame implements ActionListener {
    JLabel labName = new JLabel("学号：");
    JLabel labDate = new JLabel("出生日期：");
    JLabel labScore = new JLabel("成绩：");
    JTextField txtName = new JTextField(20);
    JTextField txtDate = new JTextField(18);
    JTextField txtScore = new JTextField(20);
    JButton btnDel = new JButton("删除");
    JButton btnCancel = new JButton("取消");
    JButton btnQuery = new JButton("查询");
    JPanel pan = new JPanel();
    JPanel pan1 = new JPanel();
    JPanel pan2 = new JPanel();
    JPanel pan3 = new JPanel();
    JPanel pan4 = new JPanel();
 
    Connection cnn;
    Statement stm;
    ResultSet rs;
 
    DeleteForm() {
        super("删除数据");
        setSize(400, 300);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        pan.setBorder(BorderFactory.createEtchedBorder());
        pan1.add(labName);
        pan1.add(txtName);
        pan2.add(labDate);
        pan2.add(txtDate);
        pan3.add(labScore);
        pan3.add(txtScore);
        pan4.add(btnQuery);
        pan4.add(btnDel);
        pan4.add(btnCancel);
        pan.setLayout(new GridLayout(3, 1));
        pan.add(pan1);
        pan.add(pan2);
        pan.add(pan3);
        getContentPane().add(pan, "Center");
        getContentPane().add(pan4, "South");
        btnQuery.addActionListener(this);
        btnDel.addActionListener(this);
        btnCancel.addActionListener(this);
        btnDel.setEnabled(false);
        txtDate.setEditable(false);
        txtScore.setEditable(false);
        setVisible(true);
        txtName.requestFocus();
 
    }
 
    public void actionPerformed(ActionEvent ae) {
        /*
         * if(ae.getSource()==btnCancel){ try { if(stm!=null) stm.close();
         * if(cnn!=null) cnn.close(); } catch (SQLException ex) {
         * ex.printStackTrace(); } this.dispose(); } else
         * if(ae.getSource()==btnQuery){ try{
         * Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
         * cnn=DriverManager.getConnection("jdbc:odbc:MyDB","","");
         * stm=cnn.createStatement(); rs=stm.executeQuery("select * from 成绩表
         * where 学号 ='"+txtName.getText()+"'"); if(rs.next()){
         * txtName.setText(rs.getString("学号"));
         * txtDate.setText(rs.getDate("出生日期").toString()); txtScore.setText(new
         * Integer(rs.getInt("成绩")).toString ()); btnDel.setEnabled(true);
         * }else{ JOptionPane.showMessageDialog(this,"不存在该记录！");
         * btnDel.setEnabled(false); txtName.setText(""); txtScore.setText("");
         * txtDate.setText(""); } }catch(Exception e){ e.printStackTrace(); }
         * }else if(ae.getSource()==btnDel){ try {
         * if(JOptionPane.YES_OPTION==JOptionPane.showConfirmDialog
         * (this,"确定要删除该记录？","信息",JOptionPane.YES_NO_OPTION)){
         * stm.executeUpdate("delete from 成绩表 where 学号
         * ='"+txtName.getText()+"'"); btnDel.setEnabled(false);
         * txtName.setText(""); txtScore.setText(""); txtDate.setText(""); } }
         * catch (SQLException ex) { ex.printStackTrace(); } }
         */
    }
 
    public static void main(String[] args) {
        new DeleteForm();
    }
}
 
class LoginForm extends JFrame implements ActionListener {
    JLabel labName = new JLabel("姓名");
    JLabel labPwd = new JLabel("密码");
    JTextField txtName = new JTextField(20);
    JPasswordField txtPwd = new JPasswordField(20);
    JButton btnOk = new JButton("确定");
    JButton btnCancel = new JButton("取消");
    JPanel pan = new JPanel();
    JPanel pan1 = new JPanel();
    JPanel pan2 = new JPanel();
    JPanel pan3 = new JPanel();
    JPanel pan4 = new JPanel();
 
    Connection cnn;
    Statement stm;
    ResultSet rs;
 
    LoginForm() {
        super("用户登录");
        setSize(300, 200);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        pan.setBorder(BorderFactory.createTitledBorder("登录"));
        pan.setLayout(new GridLayout(2, 1));
        pan1.add(labName);
        pan1.add(txtName);
        pan2.add(labPwd);
        pan2.add(txtPwd);
        pan.add(pan1);
        pan.add(pan2);
        pan3.add(btnOk);
        pan3.add(btnCancel);
        pan4.add(pan);
        getContentPane().add(pan4, "Center");
        getContentPane().add(pan3, "South");
        txtName.addActionListener(this);
        txtPwd.addActionListener(this);
        btnOk.addActionListener(this);
        btnCancel.addActionListener(this);
        setVisible(true);
 
        try {
            Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
        } catch (ClassNotFoundException ex) {
            ex.printStackTrace();
        }
        try {
            cnn = DriverManager.getConnection("Jdbc:Odbc:MyDB");
            stm = cnn.createStatement();
        } catch (SQLException ex) {
            ex.printStackTrace();
        }
        txtName.requestFocus();
 
    }
 
    public void actionPerformed(ActionEvent ae) {
        if (ae.getSource() == txtName)
            txtPwd.requestFocus();
        else if (ae.getSource() == txtPwd)
            btnOk.requestFocus();
        else if (ae.getSource() == btnCancel) {
            txtName.setText("");
            txtPwd.setText("");
            txtName.requestFocus();
        } else if (ae.getSource() == btnOk) {
            String str = "select * from 用户表 where 用户名='" + txtName.getText()
                    + "'and 密码='" + new String(txtPwd.getPassword()) + "'";
            try {
                rs = stm.executeQuery(str);
            } catch (SQLException ex) {
                ex.printStackTrace();
            }
            try {
                if (rs.next()) {
                    JOptionPane.showMessageDialog(this, "验证通过!", "信息",
                            JOptionPane.INFORMATION_MESSAGE);
                    rs.close();
                    stm.close();
                    cnn.close();
                    new MainForm().setVisible(true);
                    this.dispose();
                } else {
                    JOptionPane.showMessageDialog(this, "用户名或密码不正确!", "信息",
                            JOptionPane.INFORMATION_MESSAGE);
                }
            } catch (SQLException ex) {
                ex.printStackTrace();
            }
        }
    }
 
    public static void main(String[] args) {
        new LoginForm();
    }
}
 
class ModifyForm extends JFrame implements ActionListener {
    JLabel labName = new JLabel("学号：");
    JLabel labDate = new JLabel("出生日期：");
    JLabel labScore = new JLabel("成绩：");
    JTextField txtName = new JTextField(20);
    JTextField txtDate = new JTextField(18);
    JTextField txtScore = new JTextField(20);
    JButton btnModify = new JButton("修改");
    JButton btnCancel = new JButton("取消");
    JButton btnQuery = new JButton("查询");
    JPanel pan = new JPanel();
    JPanel pan1 = new JPanel();
    JPanel pan2 = new JPanel();
    JPanel pan3 = new JPanel();
    JPanel pan4 = new JPanel();
 
    Connection cnn;
    Statement stm;
    ResultSet rs;
 
    ModifyForm() {
        super("修改数据");
        setSize(400, 300);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        pan.setBorder(BorderFactory.createEtchedBorder());
        pan1.add(labName);
        pan1.add(txtName);
        pan2.add(labDate);
        pan2.add(txtDate);
        pan3.add(labScore);
        pan3.add(txtScore);
        pan4.add(btnQuery);
        pan4.add(btnModify);
        pan4.add(btnCancel);
        pan.setLayout(new GridLayout(3, 1));
        pan.add(pan1);
        pan.add(pan2);
        pan.add(pan3);
        getContentPane().add(pan, "Center");
        getContentPane().add(pan4, "South");
        btnQuery.addActionListener(this);
        btnModify.addActionListener(this);
        btnCancel.addActionListener(this);
        btnModify.setEnabled(false);
        txtDate.setEditable(false);
        txtScore.setEditable(false);
        setVisible(true);
        txtName.requestFocus();
 
    }
 
    public void actionPerformed(ActionEvent ae) {
        if (ae.getSource() == btnCancel) {
            try {
                if (stm != null)
                    stm.close();
                if (cnn != null)
                    cnn.close();
            } catch (SQLException ex) {
                ex.printStackTrace();
            }
            this.dispose();
        } else if (ae.getSource() == btnQuery) {
            try {
                Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
                cnn = DriverManager.getConnection("jdbc:odbc:MyDB", "", "");
                stm = cnn.createStatement();
                rs = stm.executeQuery("select * from 成绩表 where 学号='"
                        + txtName.getText() + "'");
                if (rs.next()) {
                    txtName.setText(rs.getString("学号"));
                    txtScore.setText(new Integer(rs.getInt("成绩")).toString());
                    txtDate.setText(rs.getDate("出生日期").toString());
                    btnModify.setEnabled(true);
                    txtDate.setEditable(true);
                    txtScore.setEditable(true);
                } else {
                    JOptionPane.showMessageDialog(this, "不存在该记录！");
                    btnModify.setEnabled(false);
                    txtName.setText("");
                    txtScore.setText("");
                    txtDate.setText("");
                    txtDate.setEditable(false);
                    txtScore.setEditable(false);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        } else if (ae.getSource() == btnModify) {
            try {
                System.out.println("Update  成绩表 set 出生日期=#" + txtDate.getText()
                        + "#,成绩=" + txtScore.getText() + " where 学号='"
                        + txtName.getText() + "'");
                stm.executeUpdate("Update  成绩表 set 出生日期=#" + txtDate.getText()
                        + "#,成绩=" + txtScore.getText() + " where 学号='"
                        + txtName.getText() + "'");
                JOptionPane.showMessageDialog(this, "记录修改完毕！");
                btnModify.setEnabled(false);
                txtName.setText("");
                txtScore.setText("");
                txtDate.setText("");
                txtDate.setEditable(false);
                txtScore.setEditable(false);
                stm.close();
                cnn.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
 
    public static void main(String[] args) {
        new ModifyForm();
    }
}
 
class NumberQueryForm extends JFrame implements ActionListener {
    JLabel labName = new JLabel("学号：");
    JLabel labDate = new JLabel("出生日期：");
    JLabel labScore = new JLabel("成绩：");
    JTextField txtName = new JTextField(20);
    JTextField txtDate = new JTextField(18);
    JTextField txtScore = new JTextField(20);
    JButton btnCancel = new JButton("取消");
    JButton btnQuery = new JButton("查询");
    JPanel pan = new JPanel();
    JPanel pan1 = new JPanel();
    JPanel pan2 = new JPanel();
    JPanel pan3 = new JPanel();
    JPanel pan4 = new JPanel();
 
    Connection cnn;
    Statement stm;
    ResultSet rs;
 
    NumberQueryForm() {
        super("按学号查询");
        setSize(400, 300);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        pan.setBorder(BorderFactory.createEtchedBorder());
        pan1.add(labName);
        pan1.add(txtName);
        pan2.add(labDate);
        pan2.add(txtDate);
        pan3.add(labScore);
        pan3.add(txtScore);
        pan4.add(btnQuery);
        pan4.add(btnCancel);
        pan.setLayout(new GridLayout(3, 1));
        pan.add(pan1);
        pan.add(pan2);
        pan.add(pan3);
        getContentPane().add(pan, "Center");
        getContentPane().add(pan4, "South");
        btnQuery.addActionListener(this);
        btnCancel.addActionListener(this);
        txtDate.setEditable(false);
        txtScore.setEditable(false);
        setVisible(true);
        txtName.requestFocus();
 
    }
 
    public void actionPerformed(ActionEvent ae) {
        if (ae.getSource() == btnCancel) {
            try {
                if (stm != null)
                    stm.close();
                if (cnn != null)
                    cnn.close();
            } catch (SQLException ex) {
                ex.printStackTrace();
            }
            this.dispose();
        } else if (ae.getSource() == btnQuery) {
            try {
                Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
                cnn = DriverManager.getConnection("jdbc:odbc:MyDB", "", "");
                stm = cnn.createStatement();
                rs = stm.executeQuery("select * from 成绩表 where 学号='"
                        + txtName.getText() + "'");
                if (rs.next()) {
                    txtName.setText(rs.getString("学号"));
                    txtScore.setText(new Integer(rs.getInt("成绩")).toString());
                    txtDate.setText(rs.getDate("出生日期").toString());
                } else {
                    JOptionPane.showMessageDialog(this, "不存在该记录！");
                    txtName.setText("");
                    txtScore.setText("");
                    txtDate.setText("");
                    txtName.requestFocus();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
 
        }
    }
 
    public static void main(String[] args) {
        new NumberQueryForm();
    }
}
 
class ScoreQueryForm extends JFrame implements ActionListener {
    JLabel labScore = new JLabel("请输入成绩：");
    JTextField txtScore = new JTextField(10);
    JButton btnQuery = new JButton("查询");
    JPanel pan1 = new JPanel();
    JPanel pan2 = new JPanel();
    String[] str = { "学号", "出生日期", "成绩" };
    Object[][] data = new Object[10][3];
    JTable table = new JTable(data, str);
    JTableHeader head = table.getTableHeader();
    JScrollPane jsp = new JScrollPane(table);
    Connection conn;
    Statement stmt;
    ResultSet rs;
 
    ScoreQueryForm() {
        super("按成绩查询");
        setSize(400, 300);
        pan1.add(labScore);
        pan1.add(txtScore);
        pan1.add(btnQuery);
        getContentPane().add(pan1, "North");
        table = new JTable(data, str);
        pan2.setLayout(new BorderLayout());
        head = table.getTableHeader();
        jsp = new JScrollPane(table);
        pan2.add(head, "North");
        pan2.add(jsp, "Center");
        getContentPane().add(pan2, "Center");
        btnQuery.addActionListener(this);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        setVisible(true);
    }
 
    public void actionPerformed(ActionEvent ae) {
        if (ae.getSource() == btnQuery) {
            int i, j, row;
            try {
                Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
                conn = DriverManager.getConnection("jdbc:odbc:MyDB", "", "");
                stmt = conn.createStatement();
 
                rs = stmt
                        .executeQuery("select COUNT(*) as rowcount from 成绩表 where 成绩="
                                + txtScore.getText());
                rs.next();
                row = rs.getInt("rowcount");
                rs.close();
                data = new Object[row][3];
                rs = stmt.executeQuery("select * from 成绩表 where 成绩="
                        + txtScore.getText());
                i = 0;
                j = 0;
                while (rs.next()) {
                    data[i][j++] = rs.getString("学号");
                    data[i][j++] = rs.getDate("出生日期");
                    data[i][j] = new Integer(rs.getInt("成绩"));
                    i++;
                    j = 0;
                }
 
                pan2.removeAll();
                getContentPane().remove(pan2);
 
                table = new JTable(data, str);
                pan2.setLayout(new BorderLayout());
                head = table.getTableHeader();
                jsp = new JScrollPane(table);
                pan2.add(head, "North");
                pan2.add(jsp, "Center");
                getContentPane().add(pan2, "Center");
                this.validate();
                rs.close();
                stmt.close();
                conn.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
 
    public static void main(String[] args) {
        new ScoreQueryForm();
    }
}
 
class MyPanel extends JPanel {
    Image img = Toolkit.getDefaultToolkit().getImage("c:/a.jpg");
 
    public void paint(Graphics g) {
        g.drawImage(img, 0, 0, this);
    }
}
 
class MainForm extends JFrame implements ActionListener {
    JMenu mSystem = new JMenu("系统");
    JMenuItem mExit = new JMenuItem("退出");
    JMenu mOperate = new JMenu("数据操作");
    JMenuItem mAdd = new JMenuItem("添加");
    JMenuItem mDel = new JMenuItem("删除");
    JMenuItem mModify = new JMenuItem("修改");
    JMenuItem mBrowse = new JMenuItem("浏览");
    JMenu mQuery = new JMenu("查询");
    JMenuItem mNumber = new JMenuItem("按学号查询");
    JMenuItem mScore = new JMenuItem("按成绩查询");
    JMenu mHelp = new JMenu("帮助");
    JMenuItem mAbout = new JMenuItem("关于");
    JMenuBar mBar = new JMenuBar();
 
    MainForm() {
        super("学生成绩管理系统");
        setSize(700, 630);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        mSystem.add(mExit);
        mOperate.add(mAdd);
        mOperate.add(mDel);
        mOperate.add(mModify);
        mOperate.add(mBrowse);
        mQuery.add(mNumber);
        mQuery.add(mScore);
        mHelp.add(mAbout);
        mBar.add(mSystem);
        mBar.add(mOperate);
        mBar.add(mQuery);
        mBar.add(mHelp);
        setJMenuBar(mBar);
        mExit.addActionListener(this);
        mAdd.addActionListener(this);
        mDel.addActionListener(this);
        mModify.addActionListener(this);
        mBrowse.addActionListener(this);
        mNumber.addActionListener(this);
        mScore.addActionListener(this);
        mAbout.addActionListener(this);
        setContentPane(new MyPanel());
        setVisible(true);
    }
 
    public void actionPerformed(ActionEvent ae) {
        if (ae.getSource() == mExit)
            System.exit(0);
        else if (ae.getSource() == mAbout)
            JOptionPane.showMessageDialog(this,
                    "学生管理系统 V1.0\n\n重庆邮电大学计算机学院\n\n2011年11月", "关于",
                    JOptionPane.INFORMATION_MESSAGE);
        else if (ae.getSource() == mAdd)
            new AddForm().setVisible(true);
        else if (ae.getSource() == mDel)
            new DeleteForm().setVisible(true);
        else if (ae.getSource() == mModify)
            new ModifyForm().setVisible(true);
        else if (ae.getSource() == mBrowse)
            new BrowseForm().setVisible(true);
        else if (ae.getSource() == mNumber)
            new NumberQueryForm().setVisible(true);
        else if (ae.getSource() == mScore)
            new ScoreQueryForm().setVisible(true);
 
    }
 
    public static void main(String[] args) {
        new MainForm();
    }
}

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