Add coockie information to the browser

Two types of schemes, recommended the second option:

One:

package com.servlet;

import java.io.IOException;
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;

/**
 * Servlet implementation class SecondServlet
 */
//@WebServlet("/SecondServlet")
public class Cookies extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#HttpServlet()
     */
    public Cookies() {
        super();
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        //解决乱码问题
        response.setContentType("text/html;charset=utf-8");
        //本次访问时间
        String time = new Date().toLocaleString();
        //shez设置时间cookie
        response.setHeader("Set-cookie", " Time = " + Time);
         // time when the acquisition was last accessed 
        String = oldtime request.getHeader ( " Cookie " );
         // accessed the last time back to the browser 
        . Response.getWriter () the Write ( " Last access time is: " + oldtime); 
        
    } 
    protected  void the doPost (the HttpServletRequest Request, the HttpServletResponse Response) 
            throws ServletException, IOException { 
        the doGet (Request, Response); 
    } 

}

 

two:

Note: If using tomcat8, then this method can not have spaces in a cookie, it will error if there are spaces

package com.servlet;

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;

/**
 * Servlet implementation class SecondServlet
 */
//@WebServlet("/SecondServlet")
public class Cookies extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#HttpServlet()
     */
    public Cookies() {
        super();
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        //解决乱码问题
        response.setContentType("text/html;charset=utf-8");
        //本次访问时间
        Date date = new Date();
        SimpleDateFormat smf = new SimpleDateFormat("yyyy-MM-dd-hh:mm:ss");
        String time = smf.format(date);
        System.out.println(time);
        //shez设置时间cookie
        Cookie cookie = new Cookie("time",time);
        response.addCookie(cookie);
        //获取上次访问时的时间
        Cookie[] cookies = request.getCookies();
        if (cookies!=null) {
            for(Cookie cookie2:cookies){
                if ("time".equals (cookie2.getName ())) {
                     // returns the browser to the last access time 
                    response.getWriter () Write (. " last access time is: " + cookie2.getValue ()); 
                    
                } 
            } 
        } 
        
        
        
    } 
    protected  void the doPost (the HttpServletRequest Request, the HttpServletResponse Response) 
            throws ServletException, IOException { 
        the doGet (Request, Response); 
    } 

}