Flutter Json数据转为和自动生成模板代码

import 'package:json_annotation/json_annotation.dart';//这个名字一定要跟模板代码的文件名一致
part 'category_mode.g.dart';@JsonSerializable()
class CategoryBean extends Object {@JsonKey(name: 'categories')List<Categories> categories;@JsonKey(name: 'message')String message;CategoryBean(this.categories,this.message,);factory CategoryBean.fromJson(Map<String, dynamic> srcJson) => _$CategoriesBeanFromJson(srcJson);Map<String, dynamic> toJson() => _$CategoriesBeanToJson(this);}@JsonSerializable()
class Categories extends Object {@JsonKey(name: 'category_id')int categoryId;@JsonKey(name: 'image')String image;@JsonKey(name: 'parent_id')int parentId;@JsonKey(name: 'name')String name;@JsonKey(name: 'original_image')String originalImage;@JsonKey(name: 'children')List<Children> children;Categories(this.categoryId,this.image,this.parentId,this.name,this.originalImage,this.children,);factory Categories.fromJson(Map<String, dynamic> srcJson) => _$CategoriesFromJson(srcJson);Map<String, dynamic> toJson() => _$CategoriesToJson(this);}@JsonSerializable()
class Children extends Object {@JsonKey(name: 'category_id')int categoryId;@JsonKey(name: 'image')String image;@JsonKey(name: 'parent_id')int parentId;@JsonKey(name: 'name')String name;@JsonKey(name: 'original_image')String originalImage;@JsonKey(name: 'children')List<dynamic> children;Children(this.categoryId,this.image,this.parentId,this.name,this.originalImage,this.children,);factory Children.fromJson(Map<String, dynamic> srcJson) => _$ChildrenFromJson(srcJson);Map<String, dynamic> toJson() => _$ChildrenToJson(this);}