Flutter Json Model

参考链接：https://examplecode.cn/2019/10/06/flutter-json-serializable/

- 添加依赖:

pubspec.yaml
  
dependencies:
  flutter:
    sdk: flutter
  json_annotation: 4.0.1
  
  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^1.0.2

dev_dependencies:
  flutter_test:
    sdk: flutter
  json_serializable: 4.1.4
  build_runner: 2.1.0

- 操作步骤

• 1: Create Model, such as User
  user.dart

• 2: 定义model， 格式为：

import 'package:json_annotation/json_annotation.dart';

part 'user.g.dart';

@JsonSerializable()
class User {
  int? id;
  String? name;
  String? address;

  User();

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

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

• 3:在目录下，执行命令：
  flutter pub run build_runner build

• 4: 然后自动生成user.g.dart 文件 和 里面的所有方法