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 ${e}');
}
}
}
///测试方法
Future<int> main() async {
/// List ==========================================================================
String jsonData =
'{"code":200,"message":"操作成功","isboolean":true,"data":[{"id":1,"name":"admin","password":"123456"},{"id":2,"name":"admin","password":"123456"}]}';
ttzq()
.listPost<LoginList>(jsonData, (data) => LoginList.fromJson(data))
.then((value) {
//print(value[0].password);
// 打印返回的数据
value.forEach((element) {
print(element.toJson());
});
});
///  ==========================================================================
String jsonData2 = '{"code":200,"message":"操作成功","isboolean":true,"data":{"id":1,"name":"admin","password":"123456"}}';
ttzq().listPost2(jsonData2,(data) => LoginList.fromJson(data)).then((value) {
print('=============================');
print(value.password);
});
/// // ==========================================================================
///可以转换  数据类型 String int bool
String jsonData3 =
'{"code":200,"message":"操作成功","isboolean":true,"data":true}';
ttzq().listPost3<bool>(jsonData3).then((value) {
print("结果：${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