能夠實現(xiàn)界面登陸、退出功能的java代碼是什么？

publicvoiddoPost(HttpServletRequestrequest,HttpServletResponseresponse)\x0d\x0athrowsServletException,IOException{response.setContentType("text/html;charset=gb2312");\x0d\x0arequest.getSession().invalidate();//清除當前用戶相關的session對象\x0d\x0aresponse.sendRedirect("login.jsp");\x0d\x0a}

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求JAVA實現(xiàn)用戶登錄界面代碼？

你要先學會截圖哦,你發(fā)的看不清楚,重新寫了一個你參考參考!

import java.awt.GridLayout;

import javax.swing.ButtonGroup;

import javax.swing.JButton;

import javax.swing.JComboBox;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JRadioButton;

import javax.swing.JTextField;

public class Day30A extends JFrame {

private static final long serialVersionUID = 1L;

private JLabel labelName,labelId,labelPass,labelMoney,labelSelect,labelCar;

private JComboBoxString jcb;

private JPanel jp1,jp2,jp3,jp4,jp5,jp6,jp7;

private ButtonGroup btg;

private JRadioButton jr1,jr2;

Day30A(){

this.setTitle("注冊賬戶");

this.setLayout(new GridLayout(7,1));

this.setSize(300,280);

this.setLocationRelativeTo(null);

this.setDefaultCloseOperation(EXIT_ON_CLOSE);

init();

this.setVisible(true);

}

private void init() {

String str="卡片類型1,卡片類型2,卡片類型3,卡片類型4,卡片類型5";

jcb=new JComboBox(str.split(","));

labelId=new JLabel("賬號: ");

labelName=new JLabel("姓名: ");

labelPass=new JLabel("密碼: ");

labelMoney=new JLabel("開戶金額:");

labelSelect=new JLabel("存款類型:");

labelCar=new JLabel("卡片類型:");

addFun1();

addFun2();

}

private void addFun2() {

this.add(jp1);

this.add(jp2);

this.add(jp3);

this.add(jp4);

this.add(jp5);

this.add(jp6);

this.add(jp7);

}

private void addFun1() {

jp1=new JPanel();

jp1.add(labelId);

jp1.add(new JTextField(15));

jp2=new JPanel();

jp2.add(labelName);

jp2.add(new JTextField(15));

jp3=new JPanel();

jp3.add(labelPass);

jp3.add(new JTextField(15));

jp4=new JPanel();

jp4.add(labelMoney);

jp4.add(new JTextField(13));

jp5=new JPanel();

jp5.add(labelSelect);

btg=new ButtonGroup();

jr1=new JRadioButton("定期");

jr2=new JRadioButton("活期",true);

btg.add(jr1);

btg.add(jr2);

jp5.add(jr1);

jp5.add(jr2);

jp6=new JPanel();

jp6.add(labelCar);

jp6.add(jcb);

jp7=new JPanel();

jp7.add(new JButton("確定"));

jp7.add(new JButton("取消"));

}

public static void main(String[] args) {

new Day30A();

}

}

登陸界面的java代碼怎么寫？

import java.awt.*;

import javax.swing.*;

import java.awt.event.*;

import java.sql.*;

class LoginFrm extends JFrame implements ActionListener

{

JLabel lbl1=new JLabel("用戶名");

JLabel lbl2=new JLabel("密碼");

JTextField txt=new JTextField(15);

JPasswordField pf=new JPasswordField();

JButton btn1=new JButton("確定");

JButton btn2=new JButton("取消");

public LoginFrm()

{

this.setTitle("登陸");

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,"登陸成功！");

}

else

JOptionPane.showMessageDialog(null,"用戶名或密碼錯誤！");

} 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);

}

}