Flutter -如何在响应嵌套时正确解析Json数据？

import 'dart:convert';
import 'package:http/http.dart' as http;

class User {
  final String name;
  final int age;
  final List<String> hobbies;

  User({required this.name, required this.age, required this.hobbies});

  factory User.fromJson(Map<String, dynamic> json) {
    return User(
      name: json['name'],
      age: json['age'],
      hobbies: List<String>.from(json['hobbies']),
    );
  }
}

Future<User> fetchUser() async {
  final response = await http.get(Uri.parse('https://example.com/api/user'));
  if (response.statusCode == 200) {
    final jsonMap = json.decode(response.body);
    return User.fromJson(jsonMap);
  } else {
    throw Exception('Failed to fetch user');
  }
}

void main() async {
  try {
    final user = await fetchUser();
    print('Name: ${user.name}');
    print('Age: ${user.age}');
    print('Hobbies: ${user.hobbies}');
  } catch (e) {
    print(e);
  }
}