Cookie

2019-11-09 18:12:09

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package com.blm.controller;import java.io.IOException;import java.net.URLEncoder;import javax.servlet.ServletException;import javax.servlet.http.Cookie;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;/** * 設置cookie * @author Administrator * */public class FirstServlet extends HttpServlet { @Override PRotected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { resp.setContentType("text/html;charset=utf-8"); //1、創建一個cookie（在服務器端創建的） //多個值存儲到一個cookie中,把多個值用一個特殊字符連接起來， //（特殊字符就是為了截取字符），然后用一個鍵來存儲連接的字符串. String value = URLEncoder.encode("張三,zhangsan1231", "UTF-8"); Cookie c=new Cookie("loginInfo", value); //不設置的話，則cookies不寫入硬盤,而是寫在內存, //只在當前頁面有用,以秒為單位，單位是秒 c.setMaxAge(2*60);//2分鐘 c.setPath("/cookiedemo/part"); //2、將一個cookie添加到客戶端 resp.addCookie(c); } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { doGet(req, resp); }}

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