JS 时间戳转日期补0操作

//转换年月日方法
    getDate(format,str){  
        var oDate = new Date(str),  
        oYear = oDate.getFullYear(),  
        oMonth = oDate.getMonth()+1,  
        oDay = oDate.getDate(),  
        oHour = oDate.getHours(),  
        oMin = oDate.getMinutes(),  
        oSec = oDate.getSeconds();
        var oTime = ''
        if(format == 'YYYY-MM-DD HH:MM:SS') {
            oTime = oYear +'-'+ this.getzf(oMonth) +'-'+ this.getzf(oDay) +' '+ this.getzf(oHour) +':'+ this.getzf(oMin) +':'+this.getzf(oSec);//最后拼接时间
        }else if(format == 'yyyy/mm/dd'){
            oTime = oYear +'/'+ this.getzf(oMonth) +'/'+ this.getzf(oDay) +' '+ this.getzf(oHour) +':'+ this.getzf(oMin) +':'+this.getzf(oSec);//最后拼接时间
        }
        return oTime;  
    },
    //补0操作  
    getzf(num){  
        if(parseInt(num) < 10){  
            num = '0'+num;  
        }  
        return num;  
    }