1.jsp登陆界面源代码
2.javascript，网站 把注册用户名验证条件改成 ： 6~18个字符，用户验证源码可使用字母、名验码网数字、证源站用暗雷源码搭建下划线，户名需以字母开头。网站html小说站源码
3.求不用数据库简单的用户验证源码PHP密码验证源码
jsp登陆界面源代码
1、login.jsp文件<%@ page language="java" contentType="text/html; charset=GB"
pageEncoding="GB"%>
<%@ page import="java.util.*" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4. 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>
<td><input 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、名验码网judge.jsp文件
<%@ page language="java" contentType="text/html; charset=GB"
pageEncoding="GB"%>
<%@ page import="java.util.*" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4. Transitional//EN">
<html>
<head>
<title>身份验证</title>
</head>
<body>
<%
request.setCharacterEncoding("GB");
String name = request.getParameter("userName");
String password = request.getParameter("password");
if(name.equals("abc")&& password.equals("")) {
3、证源站用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=GB"
pageEncoding="GB"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4. Transitional//EN">
<html>
<head>
<title>登录成功</title>
</head>
<body>
<%
request.setCharacterEncoding("GB");
String name = request.getParameter("userName");
out.println("欢迎你:" + name);
%>
</body>
</html>
扩展资料：
1、户名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://.0.0.1:;DatabaseName=***";
Connection con=null;
try{
con=DriverManager.getConnection(url,网站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. Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<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",用户验证源码 "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. Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO--1">
<title>Insert title here</title>
</head>
<body>
<hr size="" width="%" align="left" color="green">
<font size="6" color="red" >登录成功 </font>
<hr size="" width="%" align="left" color="green">
</body>
</html>
4、名验码网档案 asp sql源码user_login.jsp文件
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4. Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO--1">
<title>登录界面</title>
</head>
<body background="C:\Users\win8\workspace\Login\image\9dcbdceab5cfbc_.jpg" >
<center>
<br><br><br><br><br><br>
<h1 style="color:yellow">Login</h1>
<br>
<form name="loginForm" action="login_check.jsp" method="post">
<table Border="0" >
<tr >
<td>账号</td>
<td><input type="text" name="username"></td>
</tr>
<tr>
<td>密码</td>
<td><input type="password" name="password">
</td>
</tr>
</table>
<br>
<input type="submit" value="登录" style="color:#BC8F8F">
</form>
</center>
</body>
</html>
javascript，证源站用 把注册用户名验证条件改成 ： 6~个字符，户名可使用字母、黑客主页网站源码数字、下划线，需以字母开头。制作网页小说源码
使用正则表达式：^[a-zA-z]\w{ 5,}$
var patt = /^[a-zA-z]\w{ 5,}$/, username1 = 'bai_du', username2 = '1_bai_du';
alert( patt.test( username1 ) ); // true;
alert( patt.test( username2 ) ); // false;
求不用数据库简单的PHP密码验证源码
不用数据将密码直接写到源程序当中是很危险的只要查看源程序就知道密码
<form action="?" method="post">
用户名:<input type="text" name="username"/></br>
密 码:<input type="password" name="pwd" /></br>
<input type="submit" value="登入" /></br>
</form>
<?php
$username='admin';
$pwd='';
if(isset($_POST['username'])){
if( $_POST['username']==$username && $_POST['pwd']==$pwd ){
echo "登入成功！";
}else{
$_POST['pwd']==$pwd ){
echo "登入失败！";
}
}
>以上就是了，这种要每次重新登入
密码也不安全，不过有办法
你重新创建一个php
<?php
echo md5("");//你要设置的密码
>进去这个页面他会给出一个md5数据摘要
复制到$pwd
然后把密码对比改为
md5($_POST["pwd"])==$pwd
这种的话别人即使看到源码也不知道密码是什么
