Flutter使用json_serializable泛型化的问题

没使用过json_serializable的，可以参考Flutter 中的JSON序列化

version

dependencies:
  flutter:
    sdk: flutter
  #  handling JSON
  json_serializable: ^4.1.0  

支持泛型化？

json_serializable 是支持泛型的（genericArgumentFactories设置为true），这通过文档可以看到

  /// ```dart
  /// @JsonSerializable(genericArgumentFactories: true)
  /// class Response<T> {
   
  ///   int status;
  ///   T value;
  /// }
  /// ```
  ///
  /// Looks like
  ///
  /// ```dart
  /// Response<T> _$ResponseFromJson<T>(
  ///   Map<String, dynamic> json,
  ///   T Function(Object json) fromJsonT,
  /// ) {
   
  ///   return Response<T>()
  ///     ..status = json['status'] as int
  ///     ..value = fromJsonT(json['value']);
  /// }
  ///
  /// Map<String, dynamic> _$ResponseToJson<T>(
  ///   Response<T> instance,
  ///   Object Function(T value) toJsonT,
  /// ) =>
  ///     <String, dynamic>{
   
  ///       'status': instance.status,
  ///       'value': toJsonT(instance.value),
  ///     };

实际使用

请求状态码

拿经常用的http请求后的状态数据举个例子：

{
   
	"errno": 0,
	"message": "请求成功",
	"data": {
   
        "title": "请问外环路怎么走？",
		"scores_num": 9
	}
}

创建RoadBean

import 'package:json_annotation/json_annotation.dart';
part 'road_bean.g.dart';

@JsonSerializable()
class RoadBean {
   
  String title;
  @JsonKey(name: 'scores_num')
  int scoresNum;