package helloworld;import java.io.IOException;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 java.io.PrintWriter;/** */@WebServlet("/HelloWorld")public class HelloWorld extends HttpServlet {    private static final long serialVersionUID = 1L;    /**     * Default constructor.      */    public HelloWorld() {        // TODO Auto-generated constructor stub        }    /**     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)     */    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {            doPost(request,response);        }    /**     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)     */    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {                     PrintWriter out = response.getWriter();         out.println("
     
      123123
     
");                      }}