javascript創建對象的幾種常見方法

//直接實例化一個對象

var Person1 = { Name: "夢在旅途", Age: 29, Sex: "男", Height: 178 };

alert(Person1.Name);

var Person2 = new Object();

Person2.Name = "夢在旅途";

Person2.Age = 29;

Person2.Sex = "男";

Person2.Height = 178;

alert(Person2.Name);

//這個是上面的簡寫

var Person3 = new Object({ Name: "夢在旅途", Age: 29, Sex: "男", Height: 178 });

alert(Person3.Name);

//先定義類，再實例化成對象

function Person4(n,a,s,h) {

    this.Name = n;

    this.Age = a;

    this.Sex = s;

    this.Height = h;

}

var p4 = new Person4("夢在旅途", 29, "男", 178);

alert(p4.Age);

function Person5(n, a, s, h) {

    //公共屬性

    this.Name = n;

    this.Age = a;

    this.Sex = s;

    this.Height = h;

    //公共方法

    this.AfterYear = function (count) {

        updateAge(count);

        alert(_currentYear +"后，我已經：" + this.Age +"歲了！");

    };

    this.Say = function () {

        alert("我的個人信息－－> Name: "+ this.Name+", Age: "+ this.Age +", Sex: "+ this.Sex +", Height:" + this.Height);

    }

    //私有屬性與方法

    var _self = this;

    var _currentYear = 2015;

    function updateAge(count) {

        _currentYear += count;

        _self.Age += count;

    };

}

var p5 = new Person5("夢在旅途", 29, "男", 178);

p5.AfterYear(10);

p5.AfterYear(25);

function SoftEngineer(n, a, s, h, lang) {

    Person5.call(this, n, a, s, h);//將Person5的所有屬性與方法包含到SoftEngineer中，從而實現繼承

    this.Lang = lang;

    this.SayCode = function () {

        alert("我是一名軟件工程師，我會" + this.Lang + "編程語言！");

    }

    this.Working = function () { };//空方法，類似面向對象中的虛方法

}

SoftEngineer.prototype = new Person5(); //將SoftEngineer的原型指定Person5的實例

var softengr = new SoftEngineer("夢在旅途", 29, "男", 178, "javascript");

softengr.Say();

softengr.SayCode();

function WebSoftEngineer(n, a, s, h, lang) {

    SoftEngineer.apply(this, [n, a, s, h, lang]);

    this.Working = function () {

        alert("我是網頁工程師，從事網頁開發設計工作！");

    };

};

WebSoftEngineer.prototype = new SoftEngineer();

function AppSoftEngineer(n, a, s, h, lang) {

    SoftEngineer.apply(this, [n, a, s, h, lang]);

    this.Working = function () {

        alert("我是應用工程師，從事客戶端應用程序開發設計工作！");

    };

};

AppSoftEngineer.prototype = new SoftEngineer();

var webengr = new WebSoftEngineer("夢在旅途", 29, "男", 178, "javascript");

webengr.Say();

webengr.Working();

var appengr = new AppSoftEngineer("夢在旅途", 29, "男", 178, "c#");

appengr.Say();

appengr.Working();