//字面量方式1，直接给定属性值
        let person = {
            name="tom"
        }
        //字面量方式2，通过get,set方法操作对象
        let person = {
            name,
            getName: function () {
                return this.name;
            },
            setName: function (name) {
                this.name = name;
            }
        };
        person.setName("tom");  

function person(name,age){
            this.name=name;
            this.age=age;
        }
        let person3=new person("tom",14);
        console.log(person3);

 //工厂模式
        function personFactory(name,age){
           let o =new Object();
            o.name=name;
            o.age=age;
            return o;
        }
        let person4=personFactory("jack",16);
        console.log(person4);

 //class 关键字
        class User{
            constructor(name){
                this.name=name;
            }
            getName(){
                return this.name;
            }
        }
        let user=new User("rose");
        console.log(user);