【会话技术】Cookie技术案例：访问时间

古城微笑少年丶 2021-12-03 23:02 326阅读 0赞

创建时间：6.30

代码：

1 package cookie;
     2 
     3 import java.io.IOException;
     4 import java.text.SimpleDateFormat;
     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 LastAccessTimeServlet extends HttpServlet {
    14 
    15     protected void doGet(HttpServletRequest request, HttpServletResponse response)
    16             throws ServletException, IOException {
    17         
    18         Date date = new Date();
    19         SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd/hh:mm:ss");
    20         String currentTime = format.format(date);
    21         
    22         Cookie cookie = new Cookie("lastAccessTime",currentTime);
    23         cookie.setMaxAge(60*10*500);
    24         response.addCookie(cookie);
    25         
    26         String lastAccessTime = null;
    27         Cookie[] cookies = request.getCookies();
    28         if(cookies!=null){
    29             for(Cookie coo : cookies){
    30                 if("lastAccessTime".equals(coo.getName())){
    31                     lastAccessTime = coo.getValue();
    32                 }
    33             }
    34         }
    35         
    36         response.setContentType("text/html;charset=UTF-8");
    37         if(lastAccessTime==null){
    38             response.getWriter().write("您第一次访问");
    39         }else{
    40             response.getWriter().write("上次访问时间："+lastAccessTime);
    41         }
    42         
    43     }
    44 
    45     protected void doPost(HttpServletRequest request, HttpServletResponse response)
    46             throws ServletException, IOException {
    47         doGet(request, response);
    48     }
    49 }

结果：

![1491599-20190717173518735-440488810.jpg][]

![1491599-20190717173542978-368931515.jpg][]

![1491599-20190717173600853-1602541171.jpg][]

转载于:https://www.cnblogs.com/musecho/p/11202502.html

[1491599-20190717173518735-440488810.jpg]: /images/20211203/254724f1e65640d887d41a375de4243b.png
[1491599-20190717173542978-368931515.jpg]: /images/20211203/3a57e74a1e55456d81eb97cdf0823592.png
[1491599-20190717173600853-1602541171.jpg]: /images/20211203/c36f07de22814b8892c916feba8d308c.png