findpassword.java

java做的局域网仿QQ聊天室,登陆界面等都是仿QQ程序

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

public class FindPassword extends JDialog
implements ActionListener
{
	private JLabel label1=new JLabel("用户名:");
	private JLabel label2=new JLabel("密码：");
	private JLabel label4=new JLabel("我的密码是什么?");
	private JLabel o=new JLabel("");
	private JLabel oo=new JLabel("");
	private JLabel ooo=new JLabel("");
	private JLabel oooo=new JLabel("");
	
	private JTextField username=new JTextField();
	private JTextField password=new JTextField();

	
	private JPanel jpTop=new JPanel();
	private JPanel jpMain=new JPanel();
	private JPanel jpBottom=new JPanel();
	private JPanel jpAll=new JPanel(new BorderLayout());
	
	private JButton jbtOK=new JButton("查找");
	private JButton jbtCancel=new JButton("取消");
	
	private Font font1=new Font("宋体",Font.BOLD,18);
	
	private Connection myCon;
	private Statement myStatement;
	private ResultSet myResultSet,myResultSetagain;
	
	
	public FindPassword()
	{
		//ConnetDataBase();
		AddTop();
		AddMain();
		AddBottom();
		
		this.setTitle("找回密码");
		this.getContentPane().add(jpAll);
		this.setSize(250,240);
		Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
		this.setLocation((d.width - this.getSize().width) / 2,
		(d.height - this.getSize().height) / 2);
		this.setVisible(true);
		
	}
	
	public void AddTop()
	{
		label4.setFont(font1);
		label4.setBackground(new Color(225,245,253));
		label4.setForeground(Color.RED);
		label4.setHorizontalAlignment(JLabel.CENTER);
		jpTop.setBackground(new Color(225,245,253));
		jpTop.setLayout(new BorderLayout());
		jpTop.add(label4,BorderLayout.CENTER);
		jpAll.add(jpTop,BorderLayout.NORTH);
	}
	
	public void AddMain()
	{
		jpMain.setLayout(new GridLayout(4,2,0,10));
		jpMain.setBackground(new Color(225,245,253));
		jpMain.add(o);
		jpMain.add(oo);
		jpMain.add(label1);
		jpMain.add(username);
		jpMain.add(label2);
		password.setEditable(false);
		jpMain.add(password);
		jpMain.add(ooo);
		jpMain.add(oooo);
		jpAll.add(jpMain,BorderLayout.CENTER);
	}
	public void AddBottom()
	{
		jpBottom.setBackground(new Color(225,245,253));
		jbtOK.addActionListener(this);
		jpBottom.add(jbtOK);
		jbtCancel.addActionListener(this);
		jpBottom.add(jbtCancel);
		jpAll.add(jpBottom,BorderLayout.SOUTH);
	}
	//public void ConnetDataBase()
	//{
		
          
	//}
	
	public void actionPerformed(ActionEvent e)
	{
		if(e.getActionCommand()=="查找")
		{
			int door=1;
			username.selectAll();
			String strusername=username.getSelectedText();	
			if(strusername==null)
			{
				JOptionPane.showMessageDialog(null,"用户名不能是空！",
				"提示",JOptionPane.ERROR_MESSAGE);
			}
			else
			{
				String strpassword=null;
				try {
            //①加载驱动程序
            Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
          }
          catch (ClassNotFoundException ex) {
            //驱动程序加载不成功，打印错误信息并退出
            System.out.println("Can not find driver " );
            System.exit( -1);
          }
          Connection con;
          try {
            //②获得jdbc 连接
            con = DriverManager.getConnection("jdbc:odbc:userlist", "user", "");
            //③创建Statement对象
            Statement stmt = con.createStatement();
            //④得到查询结果集
            String sql = "select * from userlist where username='" 
				+ username.getText() + "'";
            ResultSet rs = stmt.executeQuery(sql);
             //System.out.print(new String(rs.getString("password")));          
            //列印结果集
            while(rs.next())
			{
				String ps = rs.getString("username");
				String pass = rs.getString("password");
				if (ps.equals(username.getText())) {
					//验证通过
					JOptionPane.showMessageDialog(null,"查找成功！\n"+
					"用户名:"+ps+"\n密码:"+pass+"\n克格勃提示您请牢记您的"+
					"用户名及密码!","恭喜您",JOptionPane.INFORMATION_MESSAGE);
					password.setText(pass);
					door=0;
				}
				
			}
			
			if(door==1)
			{
					JOptionPane.showMessageDialog(null,"无此用户！","错误"
					,JOptionPane.INFORMATION_MESSAGE);
			}
            //⑤关闭数据库连接
            rs.close();
            stmt.close();
            con.close();
          }
          catch (SQLException sqe) {
            sqe.printStackTrace();
          }
			}
		}
		else if(e.getActionCommand()=="取消")
		{
			this.dispose();
		}
	}
	
}