package com.jeelearning.servlet;import java.io.IOException;import java.io.PrintWriter;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;@WebServlet("/newSession")public class NewSession extends HttpServlet {    private static final long serialVersionUID = 1L;        protected void doGet(HttpServletRequest request,            HttpServletResponse response) throws ServletException, IOException {        response.setCharacterEncoding("utf-8");        response.setHeader("Content-type", "text/html;charset=utf-8");        PrintWriter out = response.getWriter();                out.println("测试Session属性<br/><br/>");                HttpSession session = request.getSession();        if (session.isNew()) {            out.println("新朋友<br/><br/>");        } else {            out.println("欢迎回来<br/><br/>");        }            }}