moduser.java

java编辑的学籍管理系统

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


public class ModUser
    extends JFrame
    implements ActionListener {
  String strurl;
  Connection conn;
  Statement stmt;
  ResultSet rs;
  Label label1 = new Label();
  TextField textField1 = new TextField();
  Label label2 = new Label();
  TextField textField2 = new TextField();
  
  Button button1 = new Button();
  TextField textField6 = new TextField();
  Button button2 = new Button();
  Label label10 = new Label();

  public ModUser() {
    try {
      jbInit();
    }
    catch (Exception e) {
      e.printStackTrace();
    }
  }

  private void jbInit() throws Exception {
    label1.setText("用户名:");
    label1.setVisible(false);
    label1.setBounds(new Rectangle(30, 11, 51, 33));
    this.getContentPane().setLayout(null);
    textField1.setText("");
    textField1.setVisible(false);
    textField1.setBounds(new Rectangle(86, 16, 74, 22));
    label2.setBounds(new Rectangle(162, 11, 28, 33));
    label2.setText("密码:");
    label2.setVisible(false);
    textField2.setText("");
    textField2.setVisible(false);
    textField2.setBounds(new Rectangle(192, 16, 44, 22));
    
    button1.setLabel("修改");
    button1.setVisible(false);
    button1.setBounds(new Rectangle(153, 241, 94, 22));
    button1.addActionListener(this);
    textField6.setText("");
    textField6.setBounds(new Rectangle(147, 92, 105, 23));
    button2.setFont(new java.awt.Font("Dialog", 1, 15));
    button2.setLabel("下一步");
    button2.setVisible(true);
    button2.setBounds(new Rectangle(156, 148, 89, 23));
    button2.addActionListener(this);
    label10.setFont(new java.awt.Font("Dialog", 1, 15));
    label10.setText("请输入要修改的用户名");
    label10.setBounds(new Rectangle(110, 49, 178, 24));
    
    this.getContentPane().add(label1, null);
    this.getContentPane().add(textField1, null);
    this.getContentPane().add(textField2, null);
    this.getContentPane().add(label2, null);
   
    this.getContentPane().add(button2, null);
    this.getContentPane().add(textField6, null);
    this.getContentPane().add(label10, null);
    this.getContentPane().add(button1, null);

    strurl =
        "jdbc:odbc:driver={Microsoft Access Driver (*.mdb)};DBQ=DataBase/student.mdb";
    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
    conn = DriverManager.getConnection(strurl);
    stmt = conn.createStatement();
    this.setTitle("用户修改");
    this.setSize(500,400);
    this.setLocation(100,200);
    this.setVisible(true);
  }

  public void actionPerformed(ActionEvent e) {
    if (e.getSource() == button2) {
      try {
        rs = stmt.executeQuery("SELECT * FROM admin where username='" +
                               textField6.getText() + "'");
        if (rs.next()) {
          textField6.setVisible(false);
          button2.setVisible(false);
          label10.setVisible(false);
          label1.setVisible(true);
          label2.setVisible(true);
         
          textField1.setVisible(true);
          textField1.enable(false);
          textField1.setText(rs.getString("username"));
          textField2.setVisible(true);
          textField2.setText(rs.getString("password"));
          button1.setVisible(true);
        }
        else
          JOptionPane.showMessageDialog(null, "无此用户名对应信息", "警告",
                                        JOptionPane.WARNING_MESSAGE);
      }
      catch (Exception eg) {
        eg.printStackTrace();
      }
    }
    else if (e.getSource() == button1) {
      try {
        stmt.execute("DELETE * FROM admin where username='" + textField1.getText() +
                     "'");
          stmt.execute(
          "insert into admin (username,password) values ('" +
          textField1.getText() + "','" + textField2.getText() + "')");
       
        JOptionPane.showMessageDialog(null, "修改信息成功!");
      }
      catch (Exception eg) {
        JOptionPane.showMessageDialog(null, "请认真检查各项(不能为空),然后重试.",
                                      "异常警告", JOptionPane.WARNING_MESSAGE);
        eg.printStackTrace();
      }
    }
  }
 
}