Cookie 保存 用户 上次 登录时间

 

 

 

package com.cn.cookie;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet("/SaveLoginTime")
public class SaveLoginTime extends HttpServlet {
    private static final long serialVersionUID = 1L;

    public SaveLoginTime() {

    }

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

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

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

        PrintWriter out = response.getWriter();
        out.print("您上次的访问时间是：");

        // get user date cookie
        Cookie cookies[] = request.getCookies();
        for (int i = 0; cookies != null && i < cookies.length; i++) {
            if (cookies[i].getName().equals("lastAccessTime")) {
                long cookieValue = Long.parseLong(cookies[i].getValue());
                Date date = new Date(cookieValue);
                out.print(date.toLocaleString());
            }
        }

        // set the lastest access time
        Cookie cookie = new Cookie("lastAccessTime", System.currentTimeMillis()
                + ""); // get current time
        cookie.setMaxAge(1 * 30 * 24 * 3600); // save one month
        cookie.setPath("/TestCookie1"); // path
        response.addCookie(cookie); // add data to Cookie

    }

}