//4。为cookie设置携带路径cookie.setPath("/WEB05/SendCookieServlet");//只有WEB05下所有都携带cookie.setPath("/WEB05");//服务器都携带cookcookie.setPath("/");//产生cookie路径下的所有资源都携带cookie.setPath("");

response.addCookie(cookie);

for(Cookie cookie : cookies){
if(cookie.getName().equal(cookieName)){
String cookieValue = cookie.getValue();
}
}

package com.oracle.web;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;
//显示上次访问时间Servlet
public class LastAccessServlet extends HttpServlet {public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {Date date=new Date();SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");//当前时间String time=sdf.format(date);//1.创建Cookie对象，记录当前最新访问时间Cookie cookie=new Cookie("lastAccessTime",time);cookie.setMaxAge(60*10);//发送Cookie到客户端
        response.addCookie(cookie);//2.获取客户端携带的CookieString lastAccessTime=null;Cookie[] cookies=request.getCookies();if(cookies!=null){for(Cookie c:cookies){if(c.getName().equals("lastAccessTime")){lastAccessTime=c.getValue();}}}//解决中文乱码response.setContentType("text/html;charset=utf-8");if(lastAccessTime==null){response.getWriter().write("你是第一次访问！");}else{response.getWriter().write("你上一次访问的时间为"+lastAccessTime);}}public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {doGet(request, response);}
}