flutter json自动生成

加入依赖

dependencies:
  json_annotation: ^2.4.0




dev_dependencies:
  build_runner: ^1.0.0
  json_serializable: ^3.0.0

导入

import 'package:json_annotation/json_annotation.dart';
import 'package:json_serializable/json_serializable.dart';
//文件名
part 'xxxxx.g.dart';

@JsonSerializable(nullable: true)
class XXX{

}

执行命令

flutter packages pub run build_runner build

生成代码后加入方法

  factory XXX.fromJson(Map<String, dynamic> json) => _$XXXFromJson(json);

  Map<String, dynamic> toJson() => _$XXXToJson(this);

来源：https://my.oschina.net/zdglf/blog/3085466