Cookie01.java

package com.aistart.cookie;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;
import java.io.IOException;@WebServlet("/cook01")
public class Cookie01 extends HttpServlet {@Overrideprotected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {//1.创建对象Cookie cookie = new Cookie("username", "zbk");//key不能重复,username只能有一个,如果有新值来,那么就会覆盖valuecookie.setMaxAge(10);//秒,到时间之后客户端就会主动删除resp.addCookie(cookie);}
}

Cookie02.java

package com.aistart.cookie;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;
import java.io.IOException;@WebServlet("/cook02")
public class Cookie02 extends HttpServlet {@Overrideprotected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {//1.创建对象Cookie cookie = new Cookie("password", "aaaa123");//在cookie是不能存储中文的//2.设定为0,尝试删除cookie.setMaxAge(0);resp.addCookie(cookie);}
}

CookieTestServlet

package com.aistart.cookie;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;
import java.io.IOException;@WebServlet("/cook")
public class CookieTestServlet extends HttpServlet {@Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {//我们获取的都是一个cookie的集合,拿是拿的数组,增加是增加的对象//获取cookie,在浏览器发送的主体是很多个键值对<String name,String value>
//        Cookie[] cookies = req.getCookies();//遍历获取的cookie所有
//        for (Cookie cookie : cookies) {
//            String name = cookie.getName();//获取name,key
//            String value = cookie.getValue();//获取value
//            int maxAge = cookie.getMaxAge();//获取过期时间
//            /*
//            * 过期时间-1(默认),关闭浏览器后就会清除
//            * 创建-------关闭浏览器(不是小窗口)
//            * */
//            System.out.println(name+" : "+value+" : "+maxAge);
//        }//返回一个cookie是,用的responseCookie name = new Cookie("username","李新宇");//一个cookie对象是一个键值对Cookie pwd = new Cookie("password","123456");//一个cookie对象是一个键值对pwd.setMaxAge(60*60*24*30);resp.addCookie(name);resp.addCookie(pwd);}@Overrideprotected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {this.doGet(req, resp);}
}

SessionServlet.java

package com.aistart.session;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;@WebServlet("/sess01")
public class SessionServlet extends HttpServlet {@Overrideprotected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {//获取sessionHttpSession session = req.getSession();session.setAttribute("username","xd");//session的手动销毁//        session.invalidate();
//        session.setMaxInactiveInterval(5);}
}

package com.aistart.session;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;@WebServlet("/sess02")
public class SessionServlet02 extends HttpServlet {@Overrideprotected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {//获取sessionHttpSession session = req.getSession();//这里面的键值对<String,Object>Object username = session.getAttribute("username");System.out.println("session.getId() = " + session.getId());System.out.println("session.isNew() = " + session.isNew());System.out.println(username);}
}