userdelete.java

B/S模式的产品管理系统

package Manager;

import javax.swing.*;
import java.sql.*;
import com.borland.jbcl.layout.*;
import java.awt.*;
import java.awt.event.*;
/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

public class userDelete extends JFrame {
  ResultSet rs;    //定义结果集
  private DBManager db =new DBManager();
  XYLayout xYLayout1 = new XYLayout();
  JLabel jLabel2 = new JLabel();
  JButton jButtonCancel = new JButton();
  JLabel jLabel1 = new JLabel();
  JTextField jTextFieldusername = new JTextField();
  JButton jButtonOK = new JButton();
  JPasswordField jPasswordold = new JPasswordField();
  public userDelete() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  public static void main(String[] args) {
    userDelete userDelete = new userDelete();
  }
  private void jbInit() throws Exception {
    jPasswordold.setText("");
    jButtonOK.setText("确定");
    jButtonOK.addMouseListener(new userDelete_jButtonOK_mouseAdapter(this));
    jButtonOK.setFont(new java.awt.Font("Dialog", 0, 16));
    jTextFieldusername.setText("");
    jTextFieldusername.setFont(new java.awt.Font("Dialog", 0, 16));
    jLabel1.setText("用户名");
    jLabel1.setFont(new java.awt.Font("Dialog", 0, 16));
    jButtonCancel.setText("取消");
    jButtonCancel.addMouseListener(new userDelete_jButtonCancel_mouseAdapter(this));
    jButtonCancel.setFont(new java.awt.Font("Dialog", 0, 16));
    jLabel2.setText("密码");
    jLabel2.setFont(new java.awt.Font("Dialog", 0, 16));
    this.getContentPane().setLayout(xYLayout1);
    xYLayout1.setWidth(364);
    xYLayout1.setHeight(225);
    this.setTitle("删除用户");
    this.getContentPane().add(jTextFieldusername, new XYConstraints(198, 28, 111, 28));
    this.getContentPane().add(jLabel2, new XYConstraints(69, 78, 80, 34));
    this.getContentPane().add(jLabel1, new XYConstraints(62, 25, 99, 34));
    this.getContentPane().add(jPasswordold,  new XYConstraints(195, 79, 111, 26));
    this.getContentPane().add(jButtonOK, new XYConstraints(67, 141, 91, 31));
    this.getContentPane().add(jButtonCancel, new XYConstraints(194, 139, 94, 30));
  }
//退出此窗口
  void jButtonCancel_mouseClicked(MouseEvent e) {
     this.dispose();
  }
//删除纪录
  void jButtonOK_mouseClicked(MouseEvent e) {
    //检验用户名是否为空
   if(jTextFieldusername.getText().trim() =="")
              { JOptionPane.showMessageDialog(null,"用户名不可为空！");
                   return;}
   //检验密码是否为空
      if(jPasswordold.getText().trim() =="")
              {JOptionPane.showMessageDialog(null,"密码不可为空！");
                  return;}
   //定义字符串对象,代表sql语句
    String strSQL ;
      //生成sql语句，用户名和密码从相应文本框取得
           strSQL="select * from user where Username='"+jTextFieldusername.getText().trim() +"' and Password='"+jPasswordold.getText().trim()+"'";
          //由DBManager对象执行查询过程
           rs=db.getResult(strSQL) ;
   //判断结果集是否为空
                     boolean  isexist=false;
                 try {
                          isexist = rs.first();
                          }
                 catch (SQLException ex1) {
                          }
   //若为空，则说明用户名不存在或密码不正确，弹出警告信息
           if(!isexist)
             {JOptionPane.showMessageDialog(null,"用户名不存在，或原密码不正确！");
                      }
   //若不为空，则说明用户名存在且密码正确
           else
             {
   //由DBManager对象执行过程，若成功返回成功信息，若失败返回失败提示
                 strSQL="delete from user where Username='"+jTextFieldusername.getText().trim() +"'";
                 if(db.executeSql(strSQL))
                    {JOptionPane.showMessageDialog(null,"成功删除！"); }
                 else
                    { JOptionPane.showMessageDialog(null," 删除失败，请重新操作！");      }
               }

  }

}

class userDelete_jButtonCancel_mouseAdapter extends java.awt.event.MouseAdapter {
  userDelete adaptee;

  userDelete_jButtonCancel_mouseAdapter(userDelete adaptee) {
    this.adaptee = adaptee;
  }
  public void mouseClicked(MouseEvent e) {
    adaptee.jButtonCancel_mouseClicked(e);
  }
}

class userDelete_jButtonOK_mouseAdapter extends java.awt.event.MouseAdapter {
  userDelete adaptee;

  userDelete_jButtonOK_mouseAdapter(userDelete adaptee) {
    this.adaptee = adaptee;
  }
  public void mouseClicked(MouseEvent e) {
    adaptee.jButtonOK_mouseClicked(e);
  }
}