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登陆界面的java代码

2008-04-27 23:34 483 查看

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[align=left] [/align]	[align=left]import java.awt.; import javax.swing.; import java.awt.event.; import java.sql.; class LoginFrm extends JFrame implements ActionListener { JLabel lbl1=new JLabel("用户名"); JLabel lbl2=new JLabel("密码"); JTextField txt=new JTextField(15); JPasswordField pf=new JPasswordField(); JButton btn1=new JButton("确定"); JButton btn2=new JButton("取消"); public LoginFrm() { this.setTitle("登陆"); JPanel jp=(JPanel)this.getContentPane(); jp.setLayout(new GridLayout(3,2,10,10)); jp.add(lbl1);jp.add(txt); jp.add(lbl2);jp.add(pf); jp.add(btn1);jp.add(btn2); btn1.addActionListener(this); btn2.addActionListener(this); } public void actionPerformed(ActionEvent ae) { if(ae.getSource()==btn1) { try { Class.forName("sun.jdbc.odbc.JdbcOdbcDriver")； Connection con=DriverManager.getConnection("jdbc:odbc:MyDB","",""); Statement cmd=con.createStatement(); ResultSet rs=cmd.executeQuery("select * from loginAndpassword where login='"+txt.getText()+"' and password='"+pf.getText()+"'"); if(rs.next()) { JOptionPane.showMessageDialog(null,"登陆成功！"); } else JOptionPane.showMessageDialog(null,"用户名或密码错误！"); } catch(Exception ex){} if(ae.getSource()==btn2) { txt.setText(""); pf.setText(""); } } } public static void main(String arg[]) { JFrame.setDefaultLookAndFeelDecorated(true); LoginFrm frm=new LoginFrm(); frm.setSize(400,200); frm.setVisible(true); } }[/align]

[align=left]import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.sql.*;

class LoginFrm extends JFrame implements ActionListener
{
JLabel lbl1=new JLabel("用户名");
JLabel lbl2=new JLabel("密码");
JTextField txt=new JTextField(15);
JPasswordField pf=new JPasswordField();
JButton btn1=new JButton("确定");
JButton btn2=new JButton("取消");

public LoginFrm()
{
this.setTitle("登陆");
JPanel jp=(JPanel)this.getContentPane();
jp.setLayout(new GridLayout(3,2,10,10));
jp.add(lbl1);jp.add(txt);
jp.add(lbl2);jp.add(pf);
jp.add(btn1);jp.add(btn2);
btn1.addActionListener(this);
btn2.addActionListener(this);
}

public void actionPerformed(ActionEvent ae)
{
if(ae.getSource()==btn1)
{
try
{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver")；
Connection con=DriverManager.getConnection("jdbc:odbc:MyDB","","");
Statement cmd=con.createStatement();
ResultSet rs=cmd.executeQuery("select * from loginAndpassword where login='"+txt.getText()+"' and password='"+pf.getText()+"'");
if(rs.next())
{
JOptionPane.showMessageDialog(null,"登陆成功！");
}
else
JOptionPane.showMessageDialog(null,"用户名或密码错误！");
} catch(Exception ex){}

if(ae.getSource()==btn2)
{
txt.setText("");
pf.setText("");
}
}
}

public static void main(String arg[])
{
JFrame.setDefaultLookAndFeelDecorated(true);
LoginFrm frm=new LoginFrm();
frm.setSize(400,200);
frm.setVisible(true);
}
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