在flutter中使用嵌套api解析模型类中的JSON？

class User {
  final String name;
  final int age;
  final Address address;

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

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

class Address {
  final String street;
  final String city;

  Address({required this.street, required this.city});

  factory Address.fromJson(Map<String, dynamic> json) {
    return Address(
      street: json['street'],
      city: json['city'],
    );
  }
}

import 'dart:convert';

void main() {
  String jsonData = '{"name": "John", "age": 25, "address": {"street": "123 Main St", "city": "New York"}}';
  
  Map<String, dynamic> json = jsonDecode(jsonData);
  User user = User.fromJson(json);
  
  print('Name: ${user.name}');
  print('Age: ${user.age}');
  print('Street: ${user.address.street}');
  print('City: ${user.address.city}');
}