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java登录源代码 javaee登录系统代码
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JAVA中GUI登录界面设计源代码是什么？
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.FlowLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
public class Login {
private JFrame frame = new JFrame("登录");
private Container c = frame.getContentPane();
private JTextField username = new JTextField();
private JPasswordField password = new JPasswordField();
private JButton ok = new JButton("确定");
private JButton cancel = new JButton("取消");
public Login(){
frame.setSize(300,200);
c.setLayout(new BorderLayout());
initFrame();
frame.setVisible(true);
}
private void initFrame() {
//顶部
JPanel titlePanel = new JPanel();
titlePanel.setLayout(new FlowLayout());
titlePanel.add(new JLabel("系统管理员登录"));
c.add(titlePanel,"North");
//中部表单
JPanel fieldPanel = new JPanel();
fieldPanel.setLayout(null);
JLabel l1 = new JLabel("用户名:");
l1.setBounds(50, 20, 50, 20);
JLabel l2 = new JLabel("密 码:");
l2.setBounds(50, 60, 50, 20);
fieldPanel.add(l1);
fieldPanel.add(l2);
username.setBounds(110,20,120,20);
password.setBounds(110,60,120,20);
fieldPanel.add(username);
fieldPanel.add(password);
c.add(fieldPanel,"Center");
//底部按钮
JPanel buttonPanel = new JPanel();
buttonPanel.setLayout(new FlowLayout());
buttonPanel.add(ok);
buttonPanel.add(cancel);
c.add(buttonPanel,"South");
}
public static void main(String[] args){
new Login();
}
}
相关问答
Q1: java登陆界面源代码是个类文件，怎样运行文件？
下载jdk并安装，之后设置下环境变量。然后直接在命令行运行就可以了（用命令java *(*代表类名)）
Q2: jsp登陆界面源代码
1、login.jsp文件
%@ page language="java" contentType="text/html; charset=GB18030"
pageEncoding="GB18030"%
%@ page import="java.util.*" %
!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
html
head
title登录页面/title
/head
body
form name="loginForm" method="post" action="judgeUser.jsp"
table
tr
td用户名:input type="text" name="userName" id="userName"/td
/tr
tr
td密码:input type="password" name="password" id="password"/td
/tr
tr
tdinput type="submit" value="登录" style="background-color:pink" input
type="reset" value="重置" style="background-color:red"/td
/tr
/table
/form
/body
/html
2、judge.jsp文件
%@ page language="java" contentType="text/html; charset=GB18030"
pageEncoding="GB18030"%
%@ page import="java.util.*" %
!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
html
head
title身份验证/title
/head
body
%
request.setCharacterEncoding("GB18030");
String name = request.getParameter("userName");
String password = request.getParameter("password");
if(name.equals("abc") password.equals("123")) {
3、afterLogin.jsp文件
%
jsp:forward page="afterLogin.jsp"
jsp:param name="userName" value="%=name%"/
/jsp:forward
%
}
else {
%
jsp:forward page="login.jsp"/
%
}
%
/body
/html
%@ page language="java" contentType="text/html; charset=GB18030"
pageEncoding="GB18030"%
!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
html
head
title登录成功/title
/head
body
%
request.setCharacterEncoding("GB18030");
String name = request.getParameter("userName");
out.println("欢迎你:" + name);
%
/body
/html
扩展资料java登录源代码：
java web登录界面源代码：
1、Data_uil.java文件
import java.sql.*;
public class Data_uil
{
public Connection getConnection()
{
try{
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
}catch(ClassNotFoundException e)
{
e.printStackTrace();
}
String user="***";
String password="***";
String url="jdbc:sqlserver://127.0.0.1:1433;DatabaseName=***";
Connection con=null;
try{
con=DriverManager.getConnection(url,user,password);
}catch(SQLException e)
{
e.printStackTrace();
}
return con;
}
public String selectPassword(String username)
{
Connection connection=getConnection();
String sql="select *from login where username=?";
PreparedStatement preparedStatement=null;
ResultSet result=null;
String password=null;
try{
preparedStatement=connection.prepareStatement(sql);
preparedStatement.setString(1,username);
result=preparedStatement.executeQuery();//可执行java登录源代码的 查询
if(result.next())
password=result.getString("password");
}catch(SQLException e){
e.printStackTrace();
}finally
{
close(preparedStatement);
close(result);
close(connection);
}
System.out.println("找到的数据库密码为："+password);
return password;
}
public void close (Connection con)
{
try{
if(con!=null)
{
con.close();
}
}catch(SQLException e)
{
e.printStackTrace();
}
}
public void close (PreparedStatement preparedStatement)
{
try{
if(preparedStatement!=null)
{
preparedStatement.close();
}
}catch(SQLException e)
{
e.printStackTrace();
}
}
public void close(ResultSet resultSet)
{
try{
if(resultSet!=null)
{
resultSet.close();
}
}catch(SQLException e)
{
e.printStackTrace();
}
}
}
2、login_check.jsp:文件
%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%
!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" ""
html
head
meta http-equiv="Content-Type" content="text/html; charset=utf-8"
title验证用户密码/title
/head
body
jsp:useBean id="util" class="util.Data_uil" scope="page" /
%
String username=(String)request.getParameter("username");
String password=(String)request.getParameter("password");
if(username==null||"".equals(username))
{
out.print("script language='javaScript' alert('用户名不能为空');/script");
response.setHeader("refresh", "0;url=user_login.jsp");
}
else
{
System.out.println("输入的用户名:"+username);
String passwordInDataBase=util.selectPassword(username);
System.out.println("密码："+passwordInDataBase);
if(passwordInDataBase==null||"".equals(passwordInDataBase))
{
out.print("script language='javaScript' alert('用户名不存在');/script");
response.setHeader("refresh", "0;url=user_login.jsp");
}
else if(passwordInDataBase.equals(password))
{
out.print("script language='javaScript' alert('登录成功');/script");
response.setHeader("refresh", "0;url=loginSucces.jsp");
}
else
{
out.print("script language='javaScript' alert('密码错误');/script");
response.setHeader("refresh", "0;url=user_login.jsp");
}
}
%
/body
/html
3、loginSucces.jsp文件
%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%
!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" ""
html
head
meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"
titleInsert title here/title
/head
body
hr size="10" width="26%" align="left" color="green"
font size="6" color="red" 登录成功 /font
hr size="10" width="26%" align="left" color="green"
/body
/html
4、user_login.jsp文件
%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%
!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" ""
html
head
meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"
title登录界面/title
/head
body background="C:\Users\win8\workspace\Login\image\9dcbdc339e72a5663b5c289fb5573c13_10.jpg"
center
brbrbrbrbrbr
h1 style="color:yellow"Login/h1
br
form name="loginForm" action="login_check.jsp" method="post"
table Border="0"
tr
td账号/td
tdinput type="text" name="username"/td
/tr
tr
td密码/td
tdinput type="password" name="password"
/td
/tr
/table
br
input type="submit" value="登录" style="color:#BC8F8F"
/form
/center
/body
/html
Q3: java编写一个登陆和注册信息的源代码,最简单的就可以,不需要数据库的那种
你这个不用数据库真的是有点难搞
我写了个用集合存储的，你看看，能否帮上你
java.util.ListString list = new ArrayListString();
list.add("qq=123");//存储的时候用（用户名=密码）的形式
list.add("ww=456");
String username = "qq";
String password = "123";
for (int i = 0; i list.size(); i++) {
String num = username +"="+password;
if(num.equals(list.get(i))){
System.out.println("登录成功");
break;
}
}
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