2.创建存放servlet的包

3右键包，新建servlet，路径将前面的servlet去掉，只需要doPost和doGet方法

编写servlet

CookieServlet.java代码如下：

package test1029;import java.io.IOException;import java.io.PrintWriter;import javax.servlet.ServletException;import javax.servlet.http.Cookie;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class CookieServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); String uname=request.getParameter("uname"); String password=request.getParameter("password"); String ck=request.getParameter("ck"); //被选中的状态是on 没有被选中的状态下是null if("on".equals(ck)){ //构造Cookie对象 //添加到Cookie中 Cookie c=new Cookie("users", uname+"-"+password); //设置过期时间 c.setMaxAge(600); //存储 response.addCookie(c); } }}

配置文件web.xml

 test1029  This is the description of my J2EE component This is the display name of my J2EE component CookieServlet test1029.CookieServlet   CookieServlet /CookieServlet   index.html index.htm index.jsp default.html default.htm default.jsp 

index.jsp代码：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><%//el表达式String names="";String pwd="";//取出CookieCookie [] c=request.getCookies();for(int i=0;i           

效果图：

1、项目运行之后，先进入登录界面，填写用户名和密码，效果如下图

2.登录后：

3.重新访问登录页面，效果如下：