如何用JAVA编写一个简单用户登陆界面？
什么都不说了 直接给你代码吧\x0d\x0apackage com.moliying.ui;\x0d\x0aimport java.awt.BorderLayout;\x0d\x0aimport java.awt.Container;\x0d\x0aimport java.awt.FlowLayout;\x0d\x0aimport java.awt.List;\x0d\x0aimport java.awt.event.ActionEvent;\x0d\x0aimport java.awt.event.ActionListener;\x0d\x0aimport java.io.BufferedWriter;\x0d\x0aimport java.io.FileOutputStream;\x0d\x0aimport java.io.OutputStreamWriter;\x0d\x0aimport java.util.ArrayList;\x0d\x0aimport java.util.Arrays;\x0d\x0aimport javax.swing.JButton;\x0d\x0aimport javax.swing.JFrame;\x0d\x0aimport javax.swing.JLabel;\x0d\x0aimport javax.swing.JPanel;\x0d\x0aimport javax.swing.JPasswordField;\x0d\x0aimport javax.swing.JTextField;\x0d\x0apublic class Login {\x0d\x0aprivate JFrame frame = new JFrame("登录");\x0d\x0aprivate Container c = frame.getContentPane();\x0d\x0aprivate JTextField username = new JTextField();\x0d\x0aprivate JPasswordField password = new JPasswordField();\x0d\x0aprivate JButton ok = new JButton("确定");\x0d\x0aprivate JButton cancel = new JButton("取消");\x0d\x0apublic Login() {\x0d\x0aframe.setSize(300, 200);\x0d\x0aframe.setBounds(450, 300, 300, 200);\x0d\x0ac.setLayout(new BorderLayout());\x0d\x0ainitFrame();\x0d\x0aframe.setVisible(true);\x0d\x0a}\x0d\x0aprivate void initFrame() {\x0d\x0a// 顶部\x0d\x0aJPanel titlePanel = new JPanel();\x0d\x0atitlePanel.setLayout(new FlowLayout());\x0d\x0atitlePanel.add(new JLabel("系统管理员登录"));\x0d\x0ac.add(titlePanel, "North");\x0d\x0a// 中部表单\x0d\x0aJPanel fieldPanel = new JPanel();\x0d\x0afieldPanel.setLayout(null);\x0d\x0aJLabel a1 = new JLabel("用户名:");\x0d\x0aa1.setBounds(50, 20, 50, 20);\x0d\x0aJLabel a2 = new JLabel("密 码:");\x0d\x0aa2.setBounds(50, 60, 50, 20);\x0d\x0afieldPanel.add(a1);\x0d\x0afieldPanel.add(a2);\x0d\x0ausername.setBounds(110, 20, 120, 20);\x0d\x0apassword.setBounds(110, 60, 120, 20);\x0d\x0afieldPanel.add(username);\x0d\x0afieldPanel.add(password);\x0d\x0ac.add(fieldPanel, "Center");\x0d\x0a// 底部按钮\x0d\x0aJPanel buttonPanel = new JPanel();\x0d\x0abuttonPanel.setLayout(new FlowLayout());\x0d\x0abuttonPanel.add(ok);\x0d\x0abuttonPanel.add(cancel);\x0d\x0ac.add(buttonPanel, "South");\x0d\x0a\x0d\x0aok.addActionListener(new ActionListener() {\x0d\x0a\x0d\x0a@Override\x0d\x0apublic void actionPerformed(ActionEvent e) {\x0d\x0aSystem.out.println(username.getText().toString());\x0d\x0a}\x0d\x0a});\x0d\x0a\x0d\x0acancel.addActionListener(new ActionListener() {\x0d\x0a\x0d\x0a@Override\x0d\x0apublic void actionPerformed(ActionEvent e) {\x0d\x0aframe.setVisible(false);\x0d\x0a}\x0d\x0a});\x0d\x0a}\x0d\x0apublic static void main(String[] args) {\x0d\x0a//new Login();\x0d\x0a\x0d\x0aString ss = "abbabbbaabbbccba";\x0d\x0a\x0d\x0aSystem.out.println(ss.split("b").length);\x0d\x0a\x0d\x0a}\x0d\x0a}
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用JAVA如何制做一个简单的登录界面？就是有用户名、密码、确定和取消按钮、最好有注册按钮。给代码。谢谢
!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
html
head
title无标题文档/title
script language="javascript"
function fsubmit(obj)
{
obj.submit();
}
function freset(obj){
obj.reset();
}
/script
/head
body bgcolor="#333333"
form id="form1" name="form1" method="post" action="conn.jsp"
table width="745" border="0" align="center"
tr
td width="100" /td
td /td
td width="104" /td
/tr
tr
td /td
td width="527" height="297" background="img/LoginBg.jpg" bgcolor="#F0F0F0"
table width="358" border="0"
tr
td width="70" height="51" /td
td width="119" /td
td width="160" /td
/tr
tr
td height="46" /td
tdfont color="#FFFFFF"用户名：/font/td
tdinput type="text" name="user" style=" width:160px" id="user" //td
/tr
tr
td height="34" /td
tdfont color="#FFFFFF"密 码：/font/td
tdinput type="password" name="pswd" style="width:160px" id="pswd" //td
/tr
tr
td height="24" /td
td /td
td /td
/tr
/table
table width="396" border="0"
tr
td width="82" height="30" /td
td width="114"img src="img/loginbutton.jpg" style="cursor:hand;" onclick="javascript:fsubmit(document.form1);"/td
td width="41" /td
td width="141"img src="img/canclebutton.jpg" style="cursor:hand;" onclick="javascript:freset(document.form1);"/td
/tr
/table /td
td /td
/tr
tr
td /td
td /td
td /td
/tr
/table
/form
/body
/html
%@ page language="java" import="java.util.*" contentType="text/html;charset=GB2312" import="java.sql.*"%
%@ page import="com.microsoft.sqlserver.jdbc.SQLServerDriver" %
%@page import="java.sql.DriverManager"%
HTML
HEAD
/HEAD
body
%
String userName=request.getParameter("user");
String Pswd =request.getParameter("pswd");
try
{
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver").newInstance();
}
catch(ClassNotFoundException e)
{
out.print("0");
out.print(e.toString());
}
try
{
Connection con=DriverManager.getConnection("jdbc:sqlserver://localhost:1433;DatabaseName=RegUser","sa","123");
Statement stmt = con.createStatement();
String sql="select * from tb_user";
ResultSet rs=stmt.executeQuery(sql);
while(rs.next())
{
if(userName.equals(rs.getString(2))Pswd.equals(rs.getString(3)))
{
rs.close();
stmt.close();
con.close();
%
jsp:forward page="index.html" /jsp:forward
%
}
}
rs.close();
stmt.close();
con.close();
%
script type="text/javascript"
if(!confirm("用户名或密码错误,是否要转入注册页"))
{
location.href="MyHtml.html";
}
else
{
location.href="Register.html";
}
/script
%
}
catch(Exception e)
{
out.print("1");
out.print(e.toString());
}
%
/body
/HTML
java实现简单登录界面，就是按个按钮就能从一个JFRAME跳转到另一个，基本就是按登录就能跳转
java实现的简单登录页面，从一个按钮点击后跳转的页面的jframe写法：
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class jb{
public static void main(String args[]){
JFrame f=new JFrame("点我跳转");
Container contentPane=f.getContentPane();
contentPane.setLayout(new GridLayout(1,2));
Icon icon=new ImageIcon("b.jpg");
JLabel label2=new JLabel("a",icon,JLabel.CENTER);
label2.setHorizontalTextPosition(JLabel.CENTER);
contentPane.setLayout(new FlowLayout( FlowLayout.CENTER,10,10));
JButton bb=new JButton("图片");
bb.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
JFrame bf=new JFrame("新窗体");
Icon icon=new ImageIcon("enter.jpg");
JLabel label2=new JLabel(icon);
bf.getContentPane().add(label2);
bf.setSize(300,360);
bf.show();
}});
contentPane.add(label2);
contentPane.add(bb);
f.pack();
f.show();
}}
求java语言的一个按钮登录代码
点击进入js，将user和pwd通过ajax调用后台java代码去判断并根据返回值判断正确则window.location.href打开新的页面
java设计个登陆页面，要求点击登录按钮时，判断用户名和密码是不是都为“123”，如果是的话，就输出“登录
楼上的辛苦了，但帮人帮到底，再加点注释，更容易理解
public class LoginFrame extends JFrame {
JTextField jtf1;
JTextField jtf2;
//构造方法，调用初始化方法
public LoginFrame() {
init();
}
//初始化当前的frame
private void init(){
//下面的方法都是从Frame继承的，用来设置Frame的标题，位置和大小
setTitle("QQ登录");
setLocation(300, 200);
setSize(300, 200);
//设置内容面板
setContentPane(createContentPane());
}
//设置内容面板
private JPanel createContentPane(){
JPanel pane = new JPanel(new BorderLayout(0,8));
pane.setBorder(new EmptyBorder(12,12,12,12));
pane.add(BorderLayout.NORTH,
new JLabel("", JLabel.CENTER));
pane.add(BorderLayout.CENTER,
createNamePwdPane());
pane.add(BorderLayout.SOUTH,
createBtnPane());
return pane;
}
//这下面都是创建用户名、密码标签和文本框，然后加到面板上显示
private JPanel createNamePwdPane(){
JPanel pane = new JPanel(new BorderLayout());
JPanel top = new JPanel(new GridLayout(2,1,0,6));
pane.add(BorderLayout.NORTH, top);
top.add(createNamePane());
top.add(createPwdPane());
return pane;
}
private JPanel createNamePane(){
JPanel pane = new JPanel(new BorderLayout(4,0));
pane.add(BorderLayout.WEST,
new JLabel("用户名:"));
jtf1= new JTextField();
pane.add(BorderLayout.CENTER,
jtf1);
return pane;
}
private JPanel createPwdPane(){
JPanel pane = new JPanel(new BorderLayout(4,0));
pane.add(BorderLayout.WEST,
new JLabel("密 码:"));
jtf2= new JPasswordField();
pane.add(BorderLayout.CENTER,jtf2 );
return pane;
}
private JPanel createBtnPane(){
JPanel pane = new JPanel(new FlowLayout());
JButton login = new JButton("登录");
login.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
//这里才是楼主要的关键代码，getText()是得到用户输入的文本内容，判断是否等于123
if(jtf2.getText().equals("123")jtf1.getText().equals("123")){
System.out.println("登录 ");
//不等就输出登录失败
}else{
System.out.println("登录失败");
}
}
});
//创建退出按钮
JButton cancel = new JButton("退出");
//给退出按钮加监听，点击该按钮时就退出系统
cancel.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
pane.add(login);
pane.add(cancel);
return pane;
}
public void showView(){
setVisible(true);
}
public static void main(String[] args) {
LoginFrame lf=new LoginFrame();
lf.showView();
}
}
分享题目：java登录按钮代码 java用户登录界面设计代码
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