【会话技术】Cookie技术 案例：访问时间

创建时间：6.30

代码：

 package cookie;

 import java.io.IOException;
 import java.text.SimpleDateFormat;
 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 LastAccessTimeServlet extends HttpServlet {

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

         Date date = new Date();
         SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd/hh:mm:ss");
         String currentTime = format.format(date);

         Cookie cookie = new Cookie("lastAccessTime",currentTime);
         cookie.setMaxAge(60*10*500);
         response.addCookie(cookie);

         String lastAccessTime = null;
         Cookie[] cookies = request.getCookies();
         if(cookies!=null){
             for(Cookie coo : cookies){
                 if("lastAccessTime".equals(coo.getName())){
                     lastAccessTime = coo.getValue();
                 }
             }
         }

         response.setContentType("text/html;charset=UTF-8");
         if(lastAccessTime==null){
             response.getWriter().write("您第一次访问");
         }else{
             response.getWriter().write("上次访问时间："+lastAccessTime);
         }

     }

     protected void doPost(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {
         doGet(request, response);
     }
 }

结果：