js 简单工厂模式

简单工厂模式,又叫静态工厂模式.由一个工厂对象决定创建某一种产品对象的实例.主要用于创建某一类对象.

var basketball  = function(){    this.title = '篮球';}basketball.prototype  = {    getMenberNum :function(){        console.log('5个人');    },    getPlayAction:function(){        console.log('投篮')    }}var football = function(){    this.title = '足球';}football.prototype = {    getMenberNum :function(){        console.log('11个人');    },    getPlayAction:function(){        console.log('射门')    }}var factory = function(type){    switch(type){        case 'basketball': return new basketball();        case 'football': return new football();    }}//然后我们就可以这么用oPlay = factory('basketball');oPlay.getMenber();oPlay2 = factory('football');oPlay2.getPlayAction();

如果两个类的共有属性比较多的时候,我们可以这样用

var factory = function(name,age,sex,national){    var obj = {};    obj.name = name;    obj.age = age;    obj.sex = sex;    switch(national){        case 'Chinese':            obj.speak = function(){                console.log('Speak Chinese');            };            break;        case 'England':            obj.speak = function(){                console.log('SpeakEnglish')            };            break;    }    return obj;}var person = new factory("Jack",'15','Man',"Chinese");person.speak();