带有三个模型类的flutter嵌套json解析

{
  "name": "John Doe",
  "age": 30,
  "address": {
    "street": "123 Main St",
    "city": "New York",
    "state": "NY"
  },
  "pets": [
    {
      "name": "Max",
      "type": "Dog"
    },
    {
      "name": "Whiskers",
      "type": "Cat"
    }
  ]
}

class Person {
  String name;
  int age;
  Address address;
  List<Pet> pets;

  Person({this.name, this.age, this.address, this.pets});

  factory Person.fromJson(Map<String, dynamic> json) {
    return Person(
      name: json['name'],
      age: json['age'],
      address: Address.fromJson(json['address']),
      pets: List<Pet>.from(json['pets'].map((pet) => Pet.fromJson(pet))),
    );
  }
}

class Address {
  String street;
  String city;
  String state;

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

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

class Pet {
  String name;
  String type;

  Pet({this.name, this.type});

  factory Pet.fromJson(Map<String, dynamic> json) {
    return Pet(
      name: json['name'],
      type: json['type'],
    );
  }
}

import 'dart:convert';

void main() {
  String jsonString = '{"name":"John Doe","age":30,"address":{"street":"123 Main St","city":"New York","state":"NY"},"pets":[{"name":"Max","type":"Dog"},{"name":"Whiskers","type":"Cat"}]}';
  
  Map<String, dynamic> json = jsonDecode(jsonString);
  Person person = Person.fromJson(json);
  
  print(person.name); // 输出：John Doe
  print(person.age); // 输出：30
  print(person.address.street); // 输出：123 Main St
  print(person.address.city); // 输出：New York
  print(person.address.state); // 输出：NY
  print(person.pets[0].name); // 输出：Max
  print(person.pets[0].type); // 输出：Dog
  print(person.pets[1].name); // 输出：Whiskers
  print(person.pets[1].type); // 输出：Cat
}