flutter 解析json另类封装方式，哈哈哈
日常学习，仅供参考，不喜 勿喷

http请求数据泛型解析封装，需要判断泛型数据类型再根据类型解析，本文只抽取了list演示

核心代码

import 'dart:convert';import 'package:webwsyn/http/bean/login_list.dart';
import 'package:webwsyn/http/bean/model.dart';class ttzq {Future<List<T>> listPost<T>(String data, T Function(dynamic data) parseModel) async {try {final jsonMap = jsonDecode(data);print('接收数据：' + data);Model<List<dynamic>> response1 = Model<List<dynamic>>.fromJson(jsonMap);List<dynamic> list = response1.data as List;return list.map((e) => parseModel(e)).toList();} catch (e) {throw Exception('Failed to send POST request ${e}');}}Future<T> listPost2<T>(String data, T Function(dynamic data) parseModel) async {try {final jsonMap = jsonDecode(data);Model<dynamic> response1 = Model<dynamic>.fromJson(jsonMap);return parseModel(response1.data);} catch (e) {throw Exception('Failed to send POST request ${e}');}}Future<T> listPost3<T>(String data) async {try {final jsonMap = jsonDecode(data);Model<dynamic> response1 = Model<dynamic>.fromJson(jsonMap);return response1.data as T;//return parseModel(response1.data);} catch (e) {throw Exception('Failed to send POST request ${e}');}}
}///测试方法
Future<int> main() async {/// List<T> ==========================================================================String jsonData ='{"code":200,"message":"操作成功","isboolean":true,"data":[{"id":1,"name":"admin","password":"123456"},{"id":2,"name":"admin","password":"123456"}]}';ttzq().listPost<LoginList>(jsonData, (data) => LoginList.fromJson(data)).then((value) {//print(value[0].password);// 打印返回的数据value.forEach((element) {print(element.toJson());});});/// <T> ==========================================================================String jsonData2 = '{"code":200,"message":"操作成功","isboolean":true,"data":{"id":1,"name":"admin","password":"123456"}}';ttzq().listPost2(jsonData2,(data) => LoginList.fromJson(data)).then((value) {print('=============================');print(value.password);});/// <Sting>/<int>/<bool> ==========================================================================///可以转换  数据类型 String int boolString jsonData3 ='{"code":200,"message":"操作成功","isboolean":true,"data":true}';ttzq().listPost3<bool>(jsonData3).then((value) {print("结果：${value}"  );});return 0;
}

//结构类

//json解析
import 'package:json_annotation/json_annotation.dart';@JsonSerializable()
class LoginList {late int id;late String name;late String password;LoginList.fromJson(Map<String, dynamic> json) {id = json['id'] as int;if (json.containsKey('name')) {name = json['name'] as String;}if (json.containsKey('password')) {password = json['password'] as String;}}Map<String, dynamic> toJson() =>{'id': id, 'name': name, 'password': password};}

//json解析
import 'package:json_annotation/json_annotation.dart';@JsonSerializable()
class Model<T> {late bool isboolean;late int code;late T data;late String message;Model({required this.isboolean,required this.code,required this.data,required this.message,});Model.fromJson(Map<String, dynamic> json) {isboolean = json['isboolean'] as bool;code = json['code'] as int;if (json.containsKey('message')) {message = json['message'] as String;}if (json.containsKey('data')) {data = json['data'] as T;}}Map<String, dynamic> toJson() =>{'isboolean': isboolean, 'code': code, 'message': message, 'data': data};
}

导入架包

dependencies:flutter:sdk: flutter#json:json_annotation: ^4.8.0