登录验证
题目描述： 编写jsp页面login.jsp、validate.jsp和success.jsp，在login.jsp页面中输入用户名和密码信息，提交给validate.jsp页面进行用户验证，如果验证为合法用户（用户名为tom，密码为jenny），这转到（forward动作标记）success.jsp页面，否则转到login.jsp页面
**login.jsp**
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>登录界面</title>
</head>
<body>
<form action="validate.jsp" method="post"> <!--action提交数据到连接的页面-->
<fieldset><legend>登录验证页面</legend>
账号：<input type="text" value="" name="userName"/><br>
密码：<input type="password" value="" name="pwd"/><br>
<input type="submit" value="提交" name="submit">
<input type="reset" value="重置">
</fieldset>
</form>
</body>
</html>
**validate.jsp**
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>验证页面</title>
</head>
<body>
<% //获取账号、密码赋值给这两个变量
String username=request.getParameter("userName");
String password=request.getParameter("pwd");
out.print(username+password);
if (username.trim().equals("tom")&&password.trim().equals("jenny")){
System.out.println("登录成功！");
%>
<jsp:forward page="success.jsp"></jsp:forward>
<% }
else{
System.out.println("用户或密码错误！");
%>
<jsp:forward page="login.jsp"></jsp:forward>
<%}%>
</body>
</html>
**success.jsp**
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>登陆成功</title>
</head>
<body>
<h2>欢迎您！</h2>
</body>
</html>
运行截图：
版权声明：本文为qq_44769557原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接和本声明。