fastjson2基本使用

据说fastjson2在性能基础上有很大提升，具体哪些内容提升可以看看这个地址https://github.com/alibaba/fastjson2/wiki/fastjson_benchmark

开始上手：

1.添加maven依赖

 com.alibaba.fastjson2
 fastjson2
 2.0.1

2.常用的类跟方法（基本跟fastJson一样）

3.读取JSON对象

package com.yicall.screen.controller;

import com.alibaba.fastjson2.JSON;
import com.alibaba.fastjson2.JSONArray;
import com.alibaba.fastjson2.JSONObject;


public class FastJson2Test {

    public static void main(String[] args){

        String str = "{"id":100}";
        JSONObject jsonObject = JSON.parseObject(str);
        int id = jsonObject.getIntValue("id");
        String str1 = "["id", 100]";
        JSONArray jsonArray = JSON.parseArray(str);
        String name = jsonArray.getString(0);
        int id1 = jsonArray.getIntValue(1);

        System.out.println("id--"+id+"--id1--"+id1+"--str--"+str+"--str1--"+str1);
    }
}

4.使用JSONPath

package com.yicall.screen.controller;

import com.alibaba.fastjson2.*;

import java.util.List;


public class FastJson2Test {

    public static void main(String[] args){

        String json = "{"store":{"book":[{"title":"第一本书","price":10},{"title":"第二本书","price":12},{"title":"第三本书","isbn":"553","price":8},{"title":"第四本书","isbn":"395","price":22}],"bicycle":{"color":"red","price":19}}}";

        // 获取json中store下book下的所有title值
        List