JSON数据如何遍历获取每个数据对象

Question

JSON数据怎么获取获取每个数据对象啊，java技术

[
    {
        "mac": "004A770124070C13",
        "appeui": "2C26C50124194000",
        "last_update_time": "20230525151128",
        "data": "485a5257534b4a68456bdc0e0ca21a00000000000000000000000008a40000000000000000000000007616",
        "reserver": "null",
        "data_type": 2,
        "gateways": [
            {
                "fcntdown": "2",
                "fcntup": "2",
                "gweui": "70b3d5fffe88b46f",
                "rssi": "-25",
                "lsnr": "9.0",
                "alti": "null",
                "lng": "null",
                "datarate": "SF7",
                "is_classb": "0",
                "lati": "null"
            }
        ]
    },
    {
        "mac": "004A770124070C06",
        "appeui": "2C26C50124194000",
        "last_update_time": "20230525151128",
        "data": "485a5257534b4a68456cdc0e0ca21a00000000000000000000000008a40000000000000000000000007716",
        "reserver": "null",
        "data_type": 2,
        "gateways": [
            {
                "fcntdown": "11",
                "fcntup": "11",
                "gweui": "70b3d5fffe88b46f",
                "rssi": "-41",
                "lsnr": "9.5",
                "alti": "null",
                "lng": "null",
                "datarate": "SF7",
                "is_classb": "0",
                "lati": "null"
            }
        ]
    },
    {
        "mac": "004A7701240706DD",
        "appeui": "2C26C50124194000",
        "last_update_time": "20230525151128",
        "data": "485a5257534b4a684500000000a21a00000000000000000000000008a40000000000000000000000001516",
        "reserver": "null",
        "data_type": 2,
        "gateways": [
            {
                "fcntdown": "2",
                "fcntup": "2",
                "gweui": "70b3d5fffe88b46f",
                "rssi": "-32",
                "lsnr": "10.2",
                "alti": "null",
                "lng": "null",
                "datarate": "SF7",
                "is_classb": "0",
                "lati": "null"
            }
        ]
    }
]

```

Answer 1

该回答引用chatgpt:Fastjson

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

// 假设你有一个名为 json 的字符串，包含了 JSON 数据
String json = "[{...}, {...}, {...}]"; // JSON 数据省略

// 使用 Fastjson 解析 JSON 数据
JSONArray jsonArray = JSON.parseArray(json);

// 遍历 jsonArray 获取每个数据对象
for (int i = 0; i < jsonArray.size(); i++) {
    JSONObject jsonObject = jsonArray.getJSONObject(i);

    // 获取对象的属性
    String mac = jsonObject.getString("mac");
    String appeui = jsonObject.getString("appeui");
    // 获取其他属性...

    // 创建对象或进行其他操作...
}