/**

  * Created by IntelliJ IDEA.

  *

  * @Auther: ShaoHsiung

  * @Date: 2018/8/28 08:22

  * @Title: 获取用户上次访问时间并返回最新的访问时间

  * @Description:

  */

 public class CookieDemo1 extends HttpServlet {

     @Override

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

         // 设置浏览器编码

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

         // 获取输出对象

         Writer out = response.getWriter();

         out.write("上次访问时间: ");

         // 获取访问时间cookie

         Cookie[] cookies = request.getCookies();

         for (int i = 0; cookies != null && i < cookies.length; i++) {

             Cookie cookie = cookies[i];

             if (cookie.getName().equals("lastAccess")) {

                 String value = cookie.getValue();

                 Date date = new Date(Long.parseLong(value));

                 out.write(date.toLocaleString());

             }

         }

         // 设置最新的访问时间cookie

         Cookie cookie = new Cookie("lastAccess", System.currentTimeMillis() + "");

         // 设置cookie有效时间 单位：秒

         cookie.setMaxAge(3600);

         // 设置cookie有效路径

         cookie.setPath(request.getContextPath());

         //System.out.println(request.getContextPath());

         //System.out.println(this.getServletContext().getContextPath());

         response.addCookie(cookie);

     }

     @Override

     protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

         doGet(req, resp);

     }

 }