flutter 复杂数据模型 转换

json 格式网址：http://www.bejson.com

json转dart工具网址：https://javiercbk.github.io/json_to_dart/

代码：

class CategoryItemModel {

String mallCategoryId;

String mallCategoryName;

List<BxMallSubDto> bxMallSubDto;

Null comments;

String image;

//构造函数

CategoryItemModel({

this.mallCategoryId,

this.mallCategoryName,

this.bxMallSubDto,

this.comments,

this.image

});

CategoryItemModel.fromJson(Map<String,dynamic>json){

mallCategoryId = json['mallCategoryId'];

mallCategoryName = json['mallCategoryName'];

if (json['bxMallSubDto'] != null) {

bxMallSubDto = new List<BxMallSubDto>();

json['bxMallSubDto'].forEach((i){

bxMallSubDto.add(new BxMallSubDto.fromJson(i));

});

}

 

comments = json['comments'];

image = json['image'];

}

// factory CategoryItemModel.fromJson(dynamic json){

// return CategoryItemModel(

// mallCategoryId:json['mallCategoryId'],

// mallCategoryName:json['mallCategoryName'],

// bxMallSubDto:json['bxMallSubDto'],

// comments:json['comments'],

// image:json['image']

// );

// }

}

class CategoryListModel {

List<CategoryItemModel> data;

CategoryListModel(this.data);

CategoryListModel.fromJson(Map<String,dynamic> json){

if (json['data'] != null) {

data = new List<CategoryItemModel>();

json['data'].forEach((v){

data.add(new CategoryItemModel.fromJson(v));

});

 

}

}

// factory CategoryListModel.fromJson(List json){

// return CategoryListModel(

// json.map((i)=>CategoryItemModel.fromJson((i))).toList()

// );

// }

}

class BxMallSubDto {

String mallSubId;

String mallCategoryId;

String mallSubName;

String comments;

BxMallSubDto(

{this.mallSubId, this.mallCategoryId, this.mallSubName, this.comments});

BxMallSubDto.fromJson(Map<String, dynamic> json) {

mallSubId = json['mallSubId'];

mallCategoryId = json['mallCategoryId'];

mallSubName = json['mallSubName'];

comments = json['comments'];

}

// Map<String, dynamic> toJson() {

// final Map<String, dynamic> data = new Map<String, dynamic>();

// data['mallSubId'] = this.mallSubId;

// data['mallCategoryId'] = this.mallCategoryId;

// data['mallSubName'] = this.mallSubName;

// data['comments'] = this.comments;

// return data;

// }

}

使用代码:

var data = json.decode(val);

CategoryListModel categoryListModel = CategoryListModel.fromJson(data);

categoryListModel.data.forEach((item)=>print(item.mallCategoryName));