iOS 中有很多优秀的model解析框架如 YYModel、MJExtesion、ObjectMapper。flutter中则需要自己处理
{
"result": {
"_id": "6333cc2d9e8e3a0f80512495",
"title": "Redmi K50 至尊版",
"cid": "59f1e4919bfd8f3bd030eed6",
"price": 2666,
"old_price": 6000,
"is_best": 1,
"is_hot": 0,
"is_new": 0,
"attr": [
{
"cate": "颜色",
"list": [
"土豪金",
"玫瑰红",
"磨砂黑"
]
},
{
"cate": "内存",
"list": [
"16G",
"32G",
"64G"
]
}
],
"status": 1,
"pic": "public\\upload\\iFrB4izNiGzov22F2aJXX0ta.png",
"content": "<p></p><p><img src=\"https://img30.360buyimg.com/sku/jfs/t1/111643/6/28163/77482/62f4dde7E242fa1e6/4c36c9375e7bc193.jpg\" alt=\"\" /><br /></p><p><img src=\"https://img30.360buyimg.com/sku/jfs/t1/90443/37/31195/87452/62f4dde5Ec8c7aaf1/703e54cd6e29a50e.jpg\" alt=\"\" /><br /></p><p><br /></p><p><img src=\"https://img30.360buyimg.com/sku/jfs/t1/190265/6/27733/47769/62f4dde5E8d804fbd/58c58ffce2e7f6c7.jpg\" alt=\"\" /><br /></p>",
"cname": "手机/电脑",
"sub_title": "骁龙8+旗舰处理器 1亿像素光学防抖 120W+5000mAh 12GB+256GB 雅黑 小米红米K50 Ultra",
"specs": "<p><img src=\"https://img30.360buyimg.com/sku/jfs/t1/159650/24/29598/241843/62f4dddeE4981f731/f617df71c2c2cab0.jpg\" alt=\"\" /></p><p><img src=\"https://img30.360buyimg.com/sku/jfs/t1/107654/14/32509/41129/62f4dde6E58e1f9c2/b2003a003fcb8eca.jpg\" alt=\"\" /><br /></p>"
}
}
json 转 dart
也可以手动制作一波
从内部到外部转换
{ "cate": "颜色", "list": [ "土豪金", "玫瑰红", "磨砂黑" ] }
class ProductContentAttr {
String? cate;
List<String>? list;
List<String>? list2;
/// 构造方法
ProductContentAttr({this.cate, this.list, this.list2});
/// json转模型
ProductContentAttr.fromJson(Map<String, dynamic> json) {
cate = json['cate'];
/// cast
list = json['list'].cast<String>();
/// 迭代器
List list2 = json['list'] ?? [];
list = list2.map((e) => e.toString()).toList();
}
/// json 转模型
factory ProductContentAttr.fromJson2(Map json) {
return ProductContentAttr(
cate: json['cate'] ?? '',
list: json['list'] ?? [],
list2: json['list'],
);
}
/// 模型转json
Map<String, dynamic> toJson() {
Map<String, dynamic> data = <String, dynamic>{};
data['cate'] = cate;
data['list'] = list;
return data;
}
}
List<String> cast
as执行强制转换，该强制转换在执行运行时检查后更改对象的静态（编译时已知）类型。它不影响对象的标识。对 * 集合 *（例如List、Map、Set）使用as会强制转换该集合对象本身，而不是其元素。
集合提供了一个.cast方法，该方法为集合返回一个新对象（一个“视图”），该集合为每个 element 执行as强制转换。
list = json['list'].cast<String>();
迭代器 转换
List list2 = list = json['list'] ?? [];
list = list2.map((e) => e.toString()).toList();
List<Object>
List list = json['attr'] ?? [];
if (list.isNotEmpty) {
attr = list.map((e) => ProductContentAttr.fromJson(e)).toList();
}
完整的解析
import 'package:jingdong/Utils/StringExtension.dart';
import '../Config/config.dart';
class ProductContentModel {
ProductContentItem? result;
ProductContentModel({this.result});
ProductContentModel.fromJson(Map<String, dynamic> json) {
result = json['result'] != null ? ProductContentItem.fromJson(json['result']) : null;
}
/// 模型转json
Map<String, dynamic> toJson() {
Map<String, dynamic> data = <String, dynamic>{};
data['result'] = result?.toJson();
return data;
}
}
class ProductContentItem {
String? id;
String title = '';
String? cid;
Object? price;
Object? oldPrice;
int? isBest;
int? isHot;
int? isNew;
int? status;
String pic = '';
String? content;
String? name;
String? subTitle;
String? specs;
List<ProductContentAttr> attr = [];
String test = '';
ProductContentItem({
this.id,
required this.title,
this.cid,
this.price,
this.oldPrice,
this.isBest,
this.isHot,
this.isNew,
this.status,
required this.pic,
this.content,
this.name,
this.subTitle,
this.specs});
/// json转模型
ProductContentItem.fromJson(Map<String, dynamic> json) {
id = json['_id'];
title = json['title'];
cid = json['cid'];
price = json['price'];
oldPrice = json['old_price'];
isBest = json['is_best'].toString().toInt();
isHot = json['is_hot'].toString().toInt();
isNew = json['is_new'].toString().toInt();
status = json['status'].toString().toInt();
//pic = json['pic'];
content = json['content'];
name = json['cname'];
subTitle = json['sub_title'];
specs = json['specs'];
List list = json['attr'] ?? [];
if (list.isNotEmpty) {
attr = list.map((e) => ProductContentAttr.fromJson(e)).toList();
}
String pic = json['pic'];
if (pic.contains('\')) {
pic = pic.replaceAll('\', '/');
if (!pic.isUrl()) {
pic = '${Config.domain}$pic';
}
this.pic = pic;
}
}
/// 模型转json
Map<String, dynamic> toJson() {
Map<String, dynamic> data = <String, dynamic>{};
data['_id'] = id;
data['title'] = title;
data['cid'] = cid;
data['price'] = price;
data['old_price'] = oldPrice;
data['is_best'] = isBest;
data['is_hot'] = isHot;
data['is_new'] = isNew;
data['status'] = status;
data['pic'] = pic;
data['content'] = content;
data['cname'] = name;
data['subTitle'] = subTitle;
data['specs'] = specs;
data['attr'] = attr.map((e) => e.toJson()).toList();
return data;
}
}
class ProductContentAttr {
String? cate;
List<String>? list;
List<ProductContentAttrItem> attr = [];
/// 构造方法
ProductContentAttr({this.cate, this.list});
/// json转模型
ProductContentAttr.fromJson(Map<String, dynamic> json) {
cate = json['cate'];
/// cast
list = json['list'].cast<String>();
/// 迭代器
List listJson = json['list'] ?? [];
list = listJson.map((e) => e.toString()).toList();
if (list != null) {
attr = list!.map((e) => ProductContentAttrItem(e, false)).toList();
}
}
/// json 转模型 工厂模式
factory ProductContentAttr.fromJson2(Map json) {
return ProductContentAttr(
cate: json['cate'] ?? '',
list: json['list'].cast<String>()
);
}
/// 模型转json
Map<String, dynamic> toJson() {
Map<String, dynamic> data = <String, dynamic>{};
data['cate'] = cate;
data['list'] = list;
return data;
}
}
class ProductContentAttrItem {
String name = '';
bool check = false;
ProductContentAttrItem(this.name, this.check);
}
