1.闭包封装。在这个封装方法中，所有的实例成员都共享属性和方法， 使得所有得方法和属性都私有且对象间共享
(function ($) {
var Person = function(name) {
return new Person.fn.init(name);
}
Person.fn = Person.prototype = {
constructor: Person,
init: function(name) {
this.name = name;
this.sayHello = function() {
this.makeArray();
}
},
makeArray: function() {
console.log(this.name);
}
}
Person.fn.init.prototype = Person.fn;
return Person;
})(jQuery);
2.对象原型封装
function Person(name,age,no){
this._name=name;
this._age=age; this._no=no;
this.checkNo=function(no){
if(!no.constructor == "string"|| no.length!=4)
throw new Error("学号必须为4位"); };
//var _no,_age,_name;
this.setNo=function(no){
this.checkNo(no); this._no=no;
}; this.getNo=function(){
return this._no; };
this.setName=function(name){ this._name=name; }; this.getName=function(){ return this._name; }; this.setAge=function(age){ this._age=age; }; this.getAge=function(){ return this._age; }; this.setNo(no); this.setName(name); this.setAge(age);}Person.prototype={ toString:function(){ return"no = " + this.getNo() + " , name = " + this.getName() + " , age = " + this.getAge(); }};var per=new Person("lili",23,"0004");sconsole.log(per.toString());per.setNo("0001");console.log(per.toString());per.setAge(25);console.log(per.toString());