logon.java~28~

软件工程实践项目

package homerealtysystem;

import java.awt.*;
import com.borland.jbcl.layout.*;
import javax.swing.*;
import java.awt.event.*;
import java.sql.*;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: </p>
 * @author 刘庆
 * @version 1.0
 */

public class LogOn extends JFrame {
  XYLayout xYLayout1 = new XYLayout();
  JButton jButton1 = new JButton();
  JTextField UserName = new JTextField();
  JPasswordField UserPassword = new JPasswordField();
  JLabel jLabel1 = new JLabel();
  JLabel jLabel2 = new JLabel();
  JPanel MainApp_jPanel = new JPanel();
  JButton jButton2 = new JButton();
  JButton jButton3 = new JButton();
  String CurrentUser = new String();
  public void setCurrentUser(String name)
  {
    CurrentUser = name;
  }
  public String getCurrentUser()
  {
    return CurrentUser;
  }

  public LogOn() throws HeadlessException {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  private void jbInit() throws Exception {
    jButton1.setBounds(new Rectangle(246, 83, 84, 27));
    jButton1.setFont(new java.awt.Font("Dialog", 0, 16));
    jButton1.setText("登陆");
    jButton1.addActionListener(new LogOn_jButton1_actionAdapter(this));
    xYLayout1.setWidth(486);
    xYLayout1.setHeight(293);
    this.setDefaultCloseOperation(HIDE_ON_CLOSE);
    this.setLocale(java.util.Locale.getDefault());
    this.setResizable(true);
    this.setState(Frame.ICONIFIED);
    this.setTitle("用户登陆界面");
    this.getContentPane().setLayout(xYLayout1);
    UserName.setFont(new java.awt.Font("Dialog", 0, 16));
    UserName.setToolTipText("");
    UserName.setSelectionStart(11);
    UserName.setText("崔宁宁");
    UserName.setBounds(new Rectangle(99, 47, 131, 30));
    UserPassword.setFont(new java.awt.Font("Dialog", 0, 16));
    UserPassword.setEditable(true);
    UserPassword.setText("111");
    UserPassword.setBounds(new Rectangle(98, 82, 131, 28));
    jLabel1.setFont(new java.awt.Font("Dialog", 0, 16));
    jLabel1.setText("用户名");
    jLabel1.setBounds(new Rectangle(27, 55, 67, 22));
    jLabel2.setFont(new java.awt.Font("Dialog", 0, 16));
    jLabel2.setText("密码");
    jLabel2.setBounds(new Rectangle(25, 82, 45, 28));
    MainApp_jPanel.setLayout(null);
    jButton2.setBounds(new Rectangle(246, 49, 84, 27));
    jButton2.setFont(new java.awt.Font("Dialog", 0, 16));
    jButton2.setVerifyInputWhenFocusTarget(true);
    jButton2.setText("注册");
    jButton2.addActionListener(new LogOn_jButton2_actionAdapter(this));
    jButton3.setBounds(new Rectangle(314, 209, 86, 33));
    jButton3.setFont(new java.awt.Font("Dialog", 0, 16));
    jButton3.setText("退出");
    jButton3.addActionListener(new LogOn_jButton3_actionAdapter(this));
    this.getContentPane().add(MainApp_jPanel,  new XYConstraints(10, 8, 469, 280));
    MainApp_jPanel.add(jLabel1, new XYConstraints(66, 88, 46, 19));
    MainApp_jPanel.add(jLabel2, new XYConstraints(64, 126, 55, -1));
    MainApp_jPanel.add(UserName, new XYConstraints(134, 86, 122, 25));
    MainApp_jPanel.add(UserPassword, new XYConstraints(134, 120, 124, 28));
    MainApp_jPanel.add(jButton2, null);
    MainApp_jPanel.add(jButton1, new XYConstraints(276, 85, 73, 27));
    MainApp_jPanel.add(jButton3, null);
    pack();
  }

  void jButton1_actionPerformed(ActionEvent e) {
    ErrorMessage errmsg=new ErrorMessage();       //错误处理
    ResultSet rs=null;                            //定义结果集rs,存放结果集
    DBbean db=new DBbean();                       //实例化dbBean用于查询
    String user=UserName.getText();
    String password=UserPassword.getText();
    //sql查询语句，用于核查用户和密码
    String sql="select * from 用户信息表 where 用户名字='"+user+"' and 密码='"+password+"'";
    //检查输入是否为空
    if(!errmsg.isEmpty(user)&&!errmsg.isEmpty(password))
    {
      try{
           rs=db.executeQuery(sql);   //执行查询
           if(rs.next())              //判断结果集是否存在
           {
             this.setCurrentUser(user);
             GetFrmLocation gfl=new GetFrmLocation();//实例化GetFrmLocatin
             UserMainFrame frame=new UserMainFrame(CurrentUser);            //实例化下一个frame
             gfl.get_location(frame);                //让frame显示在屏幕中心
             frame.show();                          //frame的显示
             this.dispose();                        //本窗体的退出
//             JOptionPane.showMessageDialog(null, "合法用户！");
            }
         else{
              //错误提示
             JOptionPane.showMessageDialog(null, "密码或用户名错误！");
            }
       }catch(SQLException ex)
            {
          System.err.println("sql error!");
             }
      }
      else{
          JOptionPane.showMessageDialog(null, "输入不能为空清输入合理数据！");
         }

  }

  void jButton3_actionPerformed(ActionEvent e) {
      System.exit(0);     //退出系统
  }

  void jButton2_actionPerformed(ActionEvent e) {
     GetFrmLocation gfl=new GetFrmLocation();//实例化GetFrmLocatin
     RegisterFrame frame=new RegisterFrame();            //实例化下一个frame
     gfl.get_location(frame);                //让frame显示在屏幕中心
     frame.show();                          //frame的显示
     this.dispose();                        //本窗体的退出

  }


}

class LogOn_jButton1_actionAdapter implements java.awt.event.ActionListener {
  LogOn adaptee;

  LogOn_jButton1_actionAdapter(LogOn adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton1_actionPerformed(e);
  }
}

class LogOn_jButton3_actionAdapter implements java.awt.event.ActionListener {
  LogOn adaptee;

  LogOn_jButton3_actionAdapter(LogOn adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton3_actionPerformed(e);
  }
}

class LogOn_jButton2_actionAdapter implements java.awt.event.ActionListener {
  LogOn adaptee;

  LogOn_jButton2_actionAdapter(LogOn adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton2_actionPerformed(e);
  }
}