时间戳转日期补0操作 js

//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;  
}