cookie案例-显示用户上次访问网站的时间

 1 package cn.itcast.cookie;
 2 
 3 import java.io.IOException;
 4 import java.io.PrintWriter;
 5 import java.util.Date;
 6 
 7 import javax.servlet.ServletException;
 8 import javax.servlet.http.Cookie;
 9 import javax.servlet.http.HttpServlet;
10 import javax.servlet.http.HttpServletRequest;
11 import javax.servlet.http.HttpServletResponse;
12 
13 public class CookieDemo extends HttpServlet {
14 
15     public void doGet(HttpServletRequest request, HttpServletResponse response)
16             throws ServletException, IOException {
17 
18         response.setCharacterEncoding("UF-8");
19         response.setContentType("text/html;charset=UTF-8");
20         
21         PrintWriter out = response.getWriter();
22         out.print("您上次访问的时间是:");
23         
24         //获得用户的时间cookie
25         Cookie cookies[] = request.getCookies();
26         for(int i=0;cookies!=null&&i<cookies.length;i++){
27             if(cookies[i].getName().equals("lastAccessTime")){
28                 long cookieValue = Long.parseLong(cookies[i].getValue());
29                 Date date = new Date(cookieValue);
30                 
31                 out.print(date.toLocaleString());
32                 
33             }
34         }
35         
36         //给用用户会送最新的访问时间。
37         Cookie cookie = new Cookie("lastAccessTime",System.currentTimeMillis()+"");
38         cookie.setMaxAge(1*30*24*3600);
39         cookie.setPath("/ServletDemo");
40         
41         response.addCookie(cookie);
42         
43     }
44 
45     
46     public void doPost(HttpServletRequest request, HttpServletResponse response)
47             throws ServletException, IOException {
48 
49         
50     }
51 
52 }