Date data=new Date();

         SimpleDateFormat format=new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");

         String Last = format.format(data);

 //        System.out.println(Last);

         Cookie cookie =new Cookie("Lastname",Last);

         cookie.setMaxAge(60*10*500);

         response.addCookie(cookie);

         //获得用户携带的cookie

         String last=null;

         Cookie[] cookies = request.getCookies();

         if(cookies!=null){

             for(Cookie coo:cookies){

                 if("Lastname".equals(coo.getName())){

                     last = coo.getValue();

                 }

             }

         }

         response.setContentType("text/html;charset=utf-8");

         if(last==null){

             response.getWriter().write("您是第一次访问");

         }else{

             response.getWriter().write("你上次访问的时间为"+last);

         }