[Java知识库]fastjson与jackson解析json数据对比

fastjson与jackson解析json数据对比

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
/*
*json字符串数据
* {  //json对象,无key(键)
  "code": 200,
  "curTime": 1647840792931,
  "data": {//json对象,key(键):即该json对象名字叫data
    "total": "3196",
    "list": [//json数组,Key(键):即该json数组名字叫list
      {
        "musicrid": "MUSIC_202132722",
        "barrage": "0",
        "artist": "等什么君(邓寓君)&FOX胡天渝",
        "mvpayinfo": {
          "play": "0",
          "vid": "13703837",
          "download": "0"
        },
        "isstar": 0,
        "rid": 202132722,     
        "album": "予·君",
        "albumid": "24792577",
        "name": "踏雪",     
        "payInfo": {
          "play": "1100",
          "overseas_nplay": "11111",
          "feeType": {
            "song": "1",
            "album": "0",
            "vip": "1",
            "bookvip": "0"
          }
        }
      },....还有...
	 
    ]
  },
  "msg": "success",
  "profileId": "site",
  "reqId": "f2d9674487bfba85c5dbb6234ffe67fd",
  "tId": ""
}
*
* */
public class Test {
    public static void main(String[] args) {
        String jsonString = null;//json字符串数据
        
        //fastjson解析json
        JSONObject jsonObj = JSONObject.parseObject(jsonString);//解析json对象
        JSONArray jsonArray = jsonObj.getJSONObject("data").getJSONArray("list");//获取到json数组         
        //上面的或者这样写一步获取到json数组
        //JSONArray jsonArray = JSONObject.parseObject(jsonString).getJSONObject("data").getJSONArray("list");//获取到json数组
        for (int i = 0; i < jsonArray.size();i++) {//遍历json数组
            String name = jsonArray.getJSONObject(i).getString("name");//歌曲名
            String rid = jsonArray.getJSONObject(i).getString("rid");//rid
            String artist = jsonArray.getJSONObject(i).getString("artist");//歌手     
        }
//=====================================================================================
        //jackson解析json
        ObjectMapper objectMapper = new ObjectMapper();//创建
        JsonNode jsonNode = objectMapper.readTree(jsonString).get("data").get("list");获取到json数组
        //上面的或者这样写一步获取到jsonNode
        //JsonNode jsonNode = new ObjectMapper().readTree(jsonString).get("data").get("list");
        for (int i = 0; i < jsonNode.size(); i++) {//遍历
            String name = jsonNode.get(i).get("name").toString();//歌曲名
            String rid = jsonNode.get(i).get("rid").toString();//rid
            String artist = jsonNode.get(i).get("artist").toString();//歌手
        }
         //foreach(增强型for循环)遍历写法
        for (JsonNode i:jsonNode) {//遍历
            String name = i.get("name").toString();//歌曲名
            String rid = i.get("rid").toString();//rid
            String artist = i.get("artist").toString();//歌手
        }

    }
}