平台java前端ajax，json请求

package com.johnny.text; 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; /** * Servlet implementation class HelloWorldAgain */ //@WebServlet("/HelloWorldAgain") public class HelloWorldAgain extends HttpServlet implements javax.servlet.Servlet{ private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public HelloWorldAgain() { super(); // TODO Auto-generated constructor stub System.out.println("init"); } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub // response.getWriter().append("Served at: ").append(request.getContextPath()); System.out.println(request.getRequestURL()); String fname= request.getParameter("fname"); String gname=request.getParameter("gname"); System.out.println(fname + gname); String fmsg=fname + gname; String jsn="{\"success\":true,\"msg\":\"good\"}"; response.getWriter().println(jsn); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }