Flutter Json数据转为和自动生成模板代码

dependencies:
	json_annotation: ^4.4.0//注解依赖

dev_dependencies:
	 json_serializable: ^6.1.4//json格式化
 	 build_runner: ^1.6.1

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;

  @JsonKey(name: 'message')
  String message;

  CategoryBean(this.categories,this.message,);

  factory CategoryBean.fromJson(Map srcJson) => _$CategoriesBeanFromJson(srcJson);

  Map 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;

  Categories(this.categoryId,this.image,this.parentId,this.name,this.originalImage,this.children,);

  factory Categories.fromJson(Map srcJson) => _$CategoriesFromJson(srcJson);

  Map 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 children;

  Children(this.categoryId,this.image,this.parentId,this.name,this.originalImage,this.children,);

  factory Children.fromJson(Map srcJson) => _$ChildrenFromJson(srcJson);

  Map toJson() => _$ChildrenToJson(this);

}

 flutter packages pub run build_runner build

 final data = [];

  Future call() => get(Uri.parse(ServiceUrl.category)).then((value) {
        Map dataMap = json.decode(value.body);
        var bean = CategoryBean.fromJson(dataMap);
        data.addAll(bean.categories);
      });