JavaScript:创建工厂函数，该函数返回具有特定属性的方法的对象

function createPerson(name, age) {
  return {
    name: name,
    age: age,
    sayHello: function() {
      console.log("Hello, my name is " + this.name + " and I am " + this.age + " years old.");
    }
  };
}

// 使用工厂函数创建对象
var person1 = createPerson("John", 25);
var person2 = createPerson("Jane", 30);

// 调用对象的方法
person1.sayHello(); // 输出：Hello, my name is John and I am 25 years old.
person2.sayHello(); // 输出：Hello, my name is Jane and I am 30 years old.