获取json发到前台web

package com.sxt.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.sxt.bean.Goods;
import com.sxt.dao.GoodsDao;
import com.sxt.dao.impl.GoodsDaoImpl;

public class FindIdServlet extends HttpServlet {

public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    this.doPost(request, response);

}

public void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    String gid = request.getParameter("gid");
    GoodsDao dao = new GoodsDaoImpl();
    try {
        Goods g = dao.findGoodsById(gid);
        PrintWriter out = response.getWriter();
        ObjectMapper om = new ObjectMapper();
        //日期格式化
        om.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
        String json = om.writeValueAsString(g);
        out.print(json);
        out.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

}