cookie案例-显示用户上次访问网站的时间

 package cn.itcast.cookie;

 import java.io.IOException;
 import java.io.PrintWriter;
 import java.util.Date;

 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 CookieDemo extends HttpServlet {

     public void doGet(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {

         response.setCharacterEncoding("UF-8");
         response.setContentType("text/html;charset=UTF-8");

         PrintWriter out = response.getWriter();
         out.print("您上次访问的时间是:");

         //获得用户的时间cookie
         Cookie cookies[] = request.getCookies();
         for(int i=0;cookies!=null&&i<cookies.length;i++){
             if(cookies[i].getName().equals("lastAccessTime")){
                 long cookieValue = Long.parseLong(cookies[i].getValue());
                 Date date = new Date(cookieValue);

                 out.print(date.toLocaleString());

             }
         }

         //给用用户会送最新的访问时间。
         Cookie cookie = new Cookie("lastAccessTime",System.currentTimeMillis()+"");
         cookie.setMaxAge(1*30*24*3600);
         cookie.setPath("/ServletDemo");

         response.addCookie(cookie);

     }

     public void doPost(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {

     }

 }