Flutter/外部ライブラリ/json

準備

jsonパッケージインストール

pubspec.yaml

dependencies:
  json_annotation: ^2.0.0

dev_dependencies:
  build_runner: ^1.0.0
  json_serializable: ^2.0.0

$ flutter package get

を実行

サンプル

lib/home/dao/user.dart

import 'package:json_annotation/json_annotation.dart';
part 'user.g.dart';
@JsonSerializable()
class User {
  User(this.name, this.age);
  String name;
  int age;
  factory User.fromJson(Map<String, dynamic> json) => _$UserFromJson(json);
  Map<String, dynamic> toJson() => _$UserToJson(this);
}