cookie之三天免登录代码-白红宇

cookie之三天免登录代码

阅读量：4676 次

发布时间：2019-06-09

本文共 2880 字，大约阅读时间需要 9 分钟。

LoginCookie.java  1 package com.bjsxt.cookie; 2  3 import java.io.IOException; 4 import java.net.URLDecoder; 5 import java.net.URLEncoder; 6  7 import javax.servlet.ServletException; 8 import javax.servlet.annotation.WebServlet; 9 import javax.servlet.http.Cookie;10 import javax.servlet.http.HttpServlet;11 import javax.servlet.http.HttpServletRequest;12 import javax.servlet.http.HttpServletResponse;13 14 /**15  * Servlet implementation class LoginCookie16  */17 @WebServlet("/LoginCookie")18 public class LoginCookie extends HttpServlet {19 20     @Override21     protected void service(HttpServletRequest req, HttpServletResponse resp)22             throws ServletException, IOException {23         System.out.println("LoginCookie.service()");24         25         //处理中文乱码26         req.setCharacterEncoding("utf-8");27         resp.setCharacterEncoding("utf-8");28         resp.setContentType("text/html;charset=utf-8");29         30         //获取请求参数31         String name=req.getParameter("uname");32         String pwd=req.getParameter("pwd");33         String check=req.getParameter("che");34         35         //处理业务36         //1:判断是否选择三天免登录37         if(check!=null&&"yes".equals(check)){38             //判断用户名和密码是否为空39             if((name!=null&&!"".equals(name))&&(pwd!=null&&!"".equals(pwd))){40             //设置cookie，保存在客户端的硬盘中41                 42             Cookie cookiename=new Cookie("cookiename",URLEncoder.encode(name,"utf-8"));43             Cookie cookiepwd=new Cookie("cookiename",URLEncoder.encode(pwd,"utf-8"));44             System.out.println("LoginCookie.service(存储cookie)");45             //设置cookie的有效期46             cookiename.setMaxAge(3*24*3600);47             cookiepwd.setMaxAge(3*24*3600);48             49             //设置访问路径50             cookiename.setPath(req.getContextPath()+"/LoginCookie");51             cookiepwd.setPath(req.getContextPath()+"/LoginCookie");52             53             //发送给浏览器客户端54             resp.addCookie(cookiename);55             resp.addCookie(cookiepwd);56         }57         58         //如果用户名和密码为空，从客户端硬盘中读取cookie59         if((name==null||"".equals(name))||(pwd==null||"".equals(pwd))){60             //读取cookie61         Cookie[] cookies=req.getCookies();62         //过滤出用户名和密码63         if(cookies!=null&&cookies.length>0){64             for(int i=0;i

index.jsp  1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2     pageEncoding="UTF-8"%> 3  4  5  6 
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                        用户名：                  
                 密码                  
                 三天免登录         
                         
       
      
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