时间对象的封装

<script type="text/javascript">  

 

    //时间对象封装

    function myDate2(date){

        this.date = new Date(date);

        this.Y = function(){

            return this.date.getFullYear();

        }

        this.m = function(){

            var m = (this.date.getMonth()+1).toString();

            if(m.length==1) return "0"+m;

            return m;

        }

        this.d = function(){

            var d = this.date.getDate().toString();

            if(d.length==1) return "0"+d;

            return d;

        }

    }

 

    //时间对象格式化

    myDate2.prototype.Format = function(format){

        if(format=="yyyy"){

            return this.Y();

        }else if(format=="yyyy-mm"){

            return this.Y()+"-"+this.m();

        }else if(format=="yyyy-mm-dd"){

            return this.Y()+"-"+this.m()+"-"+this.d();

        }

        throw new error("非法的格式");

    }

 

    //时间对象加减

    myDate2.prototype.AddDate = function(Y,m,d){

        this.date.setFullYear(parseInt(this.Y())+Y);

        this.date.setMonth(parseInt(this.m())+m-1);

        this.date.setDate(parseInt(this.d())+d);

        return this;

    }

 

    //工厂

    function myDate(date){

        return new myDate2(date);

    }

 

    //举个栗子

    var d = myDate("2016-02-14");//将字符串时间实例化myDate2对象

    d.AddDate(0,0,10);//加10天

    console.log(d.Format("yyyy-mm-dd"));//格式化输出2016-02-24

</script>