Javascript 创建对象

一、工厂模式

function createPerson(name,age,job){
            var o=new Object();
                o.name=name;
                o.age=age;
                o.job=job;
                o.sayHi=function(){
                    alert(this.name);
                };
            return o;
        }
        var person1=createPerson("xiaoming",29,"student");

 

二、构造函数模式

function Person(name,age,job){
        this.name=name;
        this.age=age;
        this.job=job;
        this.sayHi=function(){
            alert(this.name);
        };
    };
    var person2=new Person("xiaohong",29,"doctor");

 

三、原型模式

function Person2(){};
    Person2.prototype.name="xiaoming";
    Person2.prototype.age=20;
    Person2.prototype.job="Doctor";
    Person2.prototype.sayHi=function(){
        alert("Hi!");
    };
    person4=new Person2();
    person4.name="newPerson";

 

四、构造函数和原型的混血

function Person(name,age,job){
        this.name=name;
        this.age=age;
        this.job=job;
        this.friends=["hebe","ella"];
    };
    Person.protoptype={
        constructor:Person,
        sayName:function(){
            alert(this.name);
        }
    }
var person=new Person("xiaoming",20,"Doctor");

 

五、动态原型模式

    function Person(name,age,job){
        this.name=name;
        this.age=age;
        this.job=job;
        if(typeof this.sayName!="function"){
            Person.prototype.sayName=function(){
                alert(this.name);
            }
        };
    };
    var friend=new Person("xiaoming",20,"Doctor");

 

六、寄生构造函数——构造函数和工厂模式的混血

function Person(name,age,job){
        var o=new Object();
        o.name=name;
        o.age=age;
        o.job=job;
        o.sayName=function(){
            alert(this.name);
        };
        return o;
    }
    var friend=new Person("hi",29,"Doctor");

 

七、稳妥构造函数

function Person(name,age,job){
        var o=new Object();
            o.sayName=function(){
                alert(name);
            };
        return o;
    }
var person=Person("xiaoming",20,"Doctor");