loginui.java

一个QQ登录注册代码

package MYclass;


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





public class LoginUI implements ActionListener
{
    JFrame j;
    JLabel jLabel1;
    JLabel jLabel2;
    JLabel jLabel3;
    JLabel jLabel4;
    JButton jButton3;
    JButton jButton2;
    JButton jButton1;
    JPasswordField jPasswordField1;
    JTextField jTextField1;
    Icon i;
  public  LoginUI()
  {
  	    j=new JFrame("JQQ");
        j.setLayout(null);
        j.setSize(340,220);
        
        jLabel1 = new JLabel();
        jLabel1.setBounds(2, 3, 352, 210);
        i=new ImageIcon("tu/d.jpg");
        jLabel1.setIcon(i);
        
        jButton3 = new JButton();
        jButton3.setBounds(245, 160, 68, 21);
        jButton3.setText("登录");
        jButton3.setForeground(Color.BLUE);
        jButton3.addActionListener(this);
        
        jButton2 = new JButton();
        jButton2.setBounds(126, 160, 71, 21);        
        jButton2.setText("取消");
        jButton2.setForeground(Color.BLUE);
        jButton2.addActionListener(this);
        
        jButton1 = new JButton();
        jButton1.setBounds(13, 160, 66, 21);       
        jButton1.setText("注册");
        jButton1.setForeground(Color.BLUE);
        jButton1.addActionListener(this);
        
        jPasswordField1 = new JPasswordField();
        jPasswordField1.setBounds(113, 111, 173, 22);
        
        jLabel3 = new JLabel();
        jLabel3.setText("QQ密码:");
        jLabel3.setForeground(Color.GREEN);
        jPasswordField1.addActionListener(this);
        jLabel3.setBounds(17, 111, 49, 21);
        
        jTextField1 = new JTextField();
        jTextField1.setBounds(113, 72, 173, 22);
        jTextField1.addActionListener(this);
        
        jLabel2 = new JLabel();
        jLabel2.setText("QQ帐号:");
        jLabel2.setForeground(Color.GREEN);
        jLabel2.setBounds(17, 72, 77, 23);
        
        jLabel4 = new JLabel();
        jLabel4.setText("制作人:   李杰");
        jLabel4.setForeground(Color.GREEN);
        jLabel4.setBounds(216, 0, 132, 31);
        
        j.add(jLabel2);
        j.add(jTextField1);
        j.add(jLabel3);
        j.add(jLabel4);
        j.add(jPasswordField1);
        j.add(jButton1);
        j.add(jButton2);
        j.add(jButton3);
        j.add(jLabel1);
        
        j.setResizable(false);
        j.setLocation(300,200);
        j.setVisible(true);
        j.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    }



     
    public void actionPerformed(ActionEvent e)
    {
       
       if(e.getActionCommand().equals("注册"))
       {
       	   j.dispose();
       	   RegisterUI zc=new RegisterUI();
       }
      else if(e.getActionCommand().equals("取消"))
      {
      	   System.exit(0);
      }
      else if(e.getActionCommand().equals("登录"))
      {
      	
      	if(jTextField1.getText().equals("")||jPasswordField1.getPassword().equals(""))
        {   
            j.dispose();
            JOptionPane.showMessageDialog(null,"用户名与密码不为空","警告",JOptionPane.INFORMATION_MESSAGE);
            LoginUI lo=new LoginUI();
        }
        else
        {
           try
           {
              Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
              Connection co=DriverManager.getConnection("jdbc:odbc:lj","sa","");
              String str="select * from zhuce where QQ=? and mima=?";
              PreparedStatement sta=co.prepareStatement(str);
              sta.setString(1, jTextField1.getText());
              sta.setString(2,jPasswordField1.getText());
              ResultSet re=sta.executeQuery();
              if(re.next())
              {
              	  j.dispose();
                  JOptionPane.showMessageDialog(null,"登录成功","消息",JOptionPane.INFORMATION_MESSAGE);
                  ClientmainUI gf=new ClientmainUI();
              }
              else
              {
              	  j.dispose();
                  JOptionPane.showMessageDialog(null,"用户名或密码错误,请重新输入!!!","警告",JOptionPane.ERROR_MESSAGE);
                  LoginUI lo=new LoginUI();
              }
              re.close();
              co.close();
            }
            catch(Exception e1)
            {
              e1.printStackTrace();
            }
           
           
        } 
       
     }
 }






    public static void main(String[] args)
    {
        LoginUI l = new LoginUI();
    }

    
}