JavaScript对象封装的简单实现方法(3种方法)

function Person(name, age) {
 this.name = name;
 this.age = age;
}
var p = new Person();  // 也可填充初始化属性，如new Person("lingceng", 22)

var obj = new Object(); // 这里也可写成 var = {};
obj.name = "lingceng";
obj.age = 22;

var p = {
 name: "lingceng", // "name":"lingceng这样加引号解析方式相同
 gender: "male"
};

function Person(name,age)
｛
  // 实例属性
  // 实例时多份拷贝
  this.name=name;
  this.age=age;
}
Person.prototype={
  // 因为原型被替换，所以需要恢复construtor的默认指向
  constructor: Person,
  showName:function(){
    alert("ShowName in prototype:"+this.name);
  },
  showAge:function(){
    alert(this.age);
  }
}
var p = new Person("lingceng", 22);
p.showAge(); // 22