cookie的使用

一、截图

二、代码

login.jsp

<%@page import="sun.security.util.Password"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    
    <% 
    request.setCharacterEncoding("UTF-8");
    response.setCharacterEncoding("UTF-8");
    String action=request.getParameter("action");
    String User=null;
    String Password=null;
	
	if("login".equals(action)) {
		//获取参数
		User=request.getParameter("username");
	    Password=request.getParameter("password");
		int Timeout=new Integer(request.getParameter("timeout"));
		
		//新建Cookie，并设置有效期
		Cookie accountCookie=new Cookie("account", User);
		accountCookie.setMaxAge(Timeout);
		
		String infoString=User+Password;
		Cookie infoCookie=new Cookie("info", infoString);
		infoCookie.setMaxAge(Timeout);
		//输出到客户端
		response.addCookie(accountCookie);
		response.addCookie(infoCookie);
		//重新请求本页面
		response.sendRedirect(request.getRequestURI()+"?"+System.currentTimeMillis());
		
		return;	
		
	}else if("logout".equals(action)) {
		
		Cookie accountCookie=new Cookie("account", "");
		accountCookie.setMaxAge(0);
		
		Cookie infoCookie=new Cookie("info", "");
		infoCookie.setMaxAge(0);
		
		response.addCookie(accountCookie);
		response.addCookie(infoCookie);
		
		response.sendRedirect(request.getRequestURI()+"?"+System.currentTimeMillis());
		
		return;	
	}
	
	boolean login=false;
	String account=null;
	String info=null;
	
	if(request.getCookies()!=null ) {
		for(Cookie cookie:request.getCookies()) {
			if(cookie.getName().equals("account"))
				account=cookie.getValue();
			if(cookie.getName().equals("info"))
				info=cookie.getValue();
			
		}
	}
	
	if(account !=null && info !=null) {
		login=info.equals(account+"123");
	}
    %> 
    
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>西南石油大学电子邮件系统</title>
<link rel="stylesheet" type="text/css" href="css/style.css">
</head>
<body>
<% if(login){ %>
  你已经登录,${cookie.account.value }.  
  <a href="${pageContext.request.requestURI }?action=logout">注销 </a>
<%}else{ %>

	<div class="top">
		<div class="r1">
			<div class="r2">
				<div class="logo"></div>
			</div>
			<a href="" target="" class="help">帮助</a>
		</div>
	</div>

	<div class="content">
		<div class="loginBar">
			<div class="box">
				<div class="tab">
					账号登录
					<div class="dragbar"></div>
				</div>
			</div>
			<div class="boxc">
				<div style="height: 10px;"></div>
				<div style="margin-left: 42px; width: 270px; height: 30px;">
					<div class="hh" id="hd">用户登录</div>
				</div>
				<form action="${pageContext.request.requestURI}?action=login" method="post"  onsubmit="return ajax()" >
				<input type="text" class="text" name="username" id="username" style="ime-mode: disabled" _autocomplete="off" placeholder="用户名" />
					<input type="password" class="text" name="password" id="password" _autocomplete="off" placeholder="密码" />
					<div style="height: 10px;"></div>
					<div class="bl">
						<span style="float: left;">
						<input type="radio" name="timeout" value="<%=30*24*60*60 %>" checked>
						<font style="color: red; font-family: 宋体; clear: both;">保存登录信息，30天内有效</font>
						</span>
						<span style="float: left;">
						<input type="radio" name="timeout" value="-1">
						<font style="color: red; font-family: 宋体; clear: both;">不保存登录信息</font>
						</span>
					</div>
					<input type="submit" class="btn" value="登 录" style="background: url(img/login_btn.jpg)" />
				</form>

			</div>
		</div>
	</div>

	<div class="bottom">西南石油大学</div>
	<%} %>
</body>
</html>

　　

posted @ 2019-04-03 22:07  DoNg_一隅  阅读(155)  评论(0)    收藏  举报