常用的json转换(序列化)工具有如下几种:
1)jsonlib:sun公司
2)Gson:google
3)fastjson:阿里巴巴 (推荐)
Jar包下载:https://pan.baidu.com/s/1J6XHPuoJYtjD5X5jENs_fQ 密码:xqi3
DemoServlet.java:
package com.xxx.web;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.google.gson.Gson;
import net.sf.json.JSONArray;
public class DemoServlet extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
//..................
//使用json的转换工具将对象或集合转成json格式的字符串
// 1、jsonlib工具完成json序列化
JSONArray array = JSONArray.fromObject(productList); // productList是要序列化的JavaBean的List。
String jsonStr = array.toString();
response.setContentType("text/html;charset=UTF-8");
response.getWriter().write(jsonStr);
//*************************************************
// 2、Gson工具完成json序列化
Gson gson = new Gson();
String json = gson.toJson(productList);
response.setContentType("text/html;charset=UTF-8");
response.getWriter().write(json);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {doGet(request, response);
}
}