flutter开发利用json_serializable进行model转换实操

1、添加依赖
pubspec.yaml

dev_dependencies:
   ...
  json_serializable: ^6.9.4

2、新建目录 lib/model

3、新建model

import 'package:json_annotation/json_annotation.dart';

//手动输入
part 'Version.g.dart'; 

@JsonSerializable()
class Version implements BaseKeep{

  var timestamp = 0;

  Version();
}

4、执行指令

dart run build_runner build

or

flutter pub run build_runner build

or 指定某个文件/目录

dart run build_runner build --build-filter="lib/model/*.dart" (推荐)

5、生成代码
Version.g.dart

image.png

6、最后

import 'package:ability_assessment/base/base_keep.dart';
import 'package:json_annotation/json_annotation.dart';

part 'Version.g.dart';

@JsonSerializable()
class Version implements BaseKeep{

  var timestamp = 0;

  Version();

  // 从JSON映射的工厂方法
  factory Version.fromJson(Map<String, dynamic> json) => _$VersionFromJson(json);

  // 转为JSON的方法
  Map<String, dynamic> toJson() => _$VersionToJson(this);

}