package simpleusers;import javax.swing.*;import java.awt.*;import java.awt.event.*;import java.sql.*;/** * <p>Title: </p> * <p>Description: </p> * <p>Copyright: Copyright (c) 2005</p> * <p>Company: </p> * @author not attributable * @version 1.0 */public class UpdateFrame extends JFrame {  Connection con = null;  Statement stmt = null;  ResultSet rs = null;  JButton jButton2 = new JButton();  JLabel jLabel2 = new JLabel();  JButton jButton1 = new JButton();  JLabel jLabel1 = new JLabel();  JPasswordField jP1 = new JPasswordField();  JTextField jT1 = new JTextField();  JLabel jLabel3 = new JLabel();  JPasswordField jP2 = new JPasswordField();  public UpdateFrame() {    try {      jbInit();    }    catch(Exception e) {      e.printStackTrace();    }  }  private void jbInit() throws Exception {    jT1.setBounds(new Rectangle(137, 46, 131, 37));    jT1.setText("");    jT1.setFont(new java.awt.Font("Dialog", 0, 16));    jP1.setBounds(new Rectangle(137, 102, 131, 37));    jP1.setText("");    jLabel1.setBounds(new Rectangle(63, 46, 61, 30));    jLabel1.setText("用戶名");    jLabel1.setFont(new java.awt.Font("Dialog", 0, 16));    jButton1.setText("確定");    jButton1.addActionListener(new UpdateFrame_jButton1_actionAdapter(this));    jButton1.setFont(new java.awt.Font("Dialog", 0, 14));    jButton1.setBounds(new Rectangle(69, 223, 69, 39));    jLabel2.setFont(new java.awt.Font("Dialog", 0, 16));    jLabel2.setText("舊密碼");    jLabel2.setBounds(new Rectangle(63, 102, 61, 30));    jButton2.setBounds(new Rectangle(184, 223, 69, 39));    jButton2.setFont(new java.awt.Font("Dialog", 0, 14));    jButton2.setText("重置");    this.getContentPane().setLayout(null);    jLabel3.setFont(new java.awt.Font("Dialog", 0, 16));    jLabel3.setText("新密碼");    jLabel3.setBounds(new Rectangle(63, 163, 61, 30));    jP2.setBounds(new Rectangle(137, 157, 131, 37));    jP2.setText("");    this.getContentPane().add(jLabel2, null);    this.getContentPane().add(jLabel1, null);    this.getContentPane().add(jP1, null);    this.getContentPane().add(jT1, null);    this.getContentPane().add(jButton1, null);    this.getContentPane().add(jButton2, null);    this.getContentPane().add(jP2, null);    this.getContentPane().add(jLabel3, null);  }  void jButton1_actionPerformed(ActionEvent e) {    String username=jT1.getText().trim();    String oldpwd=jP1.getText().trim();    String newpwd=jP2.getText().trim();    String sql1="select * from userandpwd where username='"+username+        "' and pwd='"+oldpwd+"'";    String sql2="update userandpwd set pwd='"+newpwd+"' where username="+        "'"+username+"'";    String msg=null;    try{      Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");    }catch(ClassNotFoundException e1){      System.out.println("加載JDBC數(shù)據(jù)庫驅動程序出錯");    }    String url="jdbc:microsoft:sqlserver://127.0.0.1:1433;DatabaseName=Test";    try{      con = DriverManager.getConnection(url, "sa", "");      stmt = con.createStatement();      rs = stmt.executeQuery(sql1);    }catch(SQLException e2){      System.out.println("數(shù)據(jù)庫連接出錯");    }    try{      if (rs.next()){        stmt.executeUpdate(sql2);        msg="歡迎你修改密碼!\n"+            "你修改密碼的用戶名稱為"+username+            ".\n新的密碼為"+newpwd+".";      }else        msg="對不起，你輸入的用戶名或密碼不正確！";    }catch(SQLException e3 ){      System.out.println("讀取數(shù)據(jù)出錯");    }    try{      rs.close();      stmt.close();      con.close();    }catch(SQLException e4){      System.out.println("關閉對象連接出錯");    }    MessageFrame m1=new MessageFrame(msg);    m1.setSize(340,280);    this.dispose();    m1.show();  }}class UpdateFrame_jButton1_actionAdapter implements java.awt.event.ActionListener {  UpdateFrame adaptee;  UpdateFrame_jButton1_actionAdapter(UpdateFrame adaptee) {    this.adaptee = adaptee;  }  public void actionPerformed(ActionEvent e) {    adaptee.jButton1_actionPerformed(e);  }}