如何在不创建引用Dart的情况下复制对象

class Person {
  String name;
  int age;

  Person(this.name, this.age);

  // 拷贝构造函数
  Person.copy(Person person) {
    this.name = person.name;
    this.age = person.age;
  }
}

void main() {
  Person person1 = Person('John', 25);
  
  // 复制对象
  Person person2 = Person.copy(person1);
  
  print(person2.name); // 输出: John
  print(person2.age); // 输出: 25
}

class Person {
  String name;
  int age;

  Person(this.name, this.age);

  // 工厂构造函数
  factory Person.copy(Person person) {
    return Person(person.name, person.age);
  }
}

void main() {
  Person person1 = Person('John', 25);
  
  // 复制对象
  Person person2 = Person.copy(person1);
  
  print(person2.name); // 输出: John
  print(person2.age); // 输出: 25
}