解析JSON绘制的绘制

Question

我从后端得到响应：

   {"measurements": {
            "pm10": {
              "name": "pm10",
              "value": 20.8647,
              "unit": "µg/m³"
            },
             "pm25": {
              "name": "pm10",
              "value": 20.8647,
              "unit": "µg/m³"
            },
             "o2": {
              "name": "pm10",
              "value": 20.8647,
              "unit": "µg/m³"
            }
        },
   "station": {
        "city": "{cityName}",
        "name": "{locationName}",
        "latitude": "54.353336",
        "longitude": "18.635283"
    }
    }

这是我目前得到的：

class Pollutions {
    Pollutions.fromJsonMap(Map<String, dynamic> map):
                measurements = Measurements.fromJsonMap(map["measurements"]),
                station = Station.fromJson(map["station"]);
  Map<String, Pollution> measurements;
  Station station;
    Map<String, dynamic> toJson() {
        final data = Map<String, dynamic>();
        data['measurements'] = measurements == null ? null : measurements.jsonDecode(measurements);
        data['station'] = station == null ? null : station.toJson();
        return data;
    }
}

在测量中，我可以获得其他值，我对它们的名称一无所知，它可能是O2，O3，不仅是PM10等，类似的东西：地图？映射的外观Pollutions.fromJsonMap和toJson方法应该如何？

Answer 1

您可以简单地通过使用dart:convert

的外部解码器来完成它

import 'package:http/http.dart' as http;
import 'dart:convert';
final response = await http.get(someEndPoint);
final Map<String, dynamic> data = json.decode(response.body);

Answer 2

上面的答案可能会出现错误内部链接的哈希地图不是映射的子类型。

而是尝试一下：

Map<String, String> map = Map.castFrom(json.decode(jsonString))

Answer 3

Map<String, dynamic> data = jsonDecode(yourVariable);