使用fastjson取json字符串的值

1、有以下格式的字符串

{
  "status": 200,
  "message": "success",
  "data": {
    "result": {
      "cost": "1984ms",
      "total_size": 1,
      "file_list": [
        "userID",
        "userName",
        "userAge",
        "userEmail",
        "userCellPhone"
      ],
      "values": [
        [
          1,
          "張三",
          18,
          "13263254837@163.com",
          "13263254837"
        ],
        [
          2,
          "李四",
          34,
          "8753624@qq.com",
          "16358753624"
        ]
      ]
    }
  }
}

需求：取出所有的姓名。

思路：获取file_list标签里userName的下标，通过下标取values 标签里的姓名

实现：

1、maven引入 fastjson jar包

        <!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.47</version>
        </dependency>

2、代码实现：

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

import java.util.List;

public class Test {
    public static void main(String[] args) {
        String result = "以上字符串";
        JSONObject jsonObject = JSON.parseObject(result);
        JSONArray keys = jsonObject.getJSONObject("data").getJSONObject("result").getJSONArray("file_list");
        List<JSONArray> values = JSON.parseArray(jsonObject.getJSONObject("data").getJSONObject("result").getString("values"), JSONArray.class);
        int keyIndex = keys.indexOf("userName");//需要脱敏的参数名称
        if (keyIndex > -1) {
            for (JSONArray valueArray : values) {
                String value = (String) valueArray.get(keyIndex);
                System.out.println("姓名：" + value);
            }
        }
    }
}