js 时间转字符串，转成yyyy-MM-dd HH:mm:SS格式

// 时间转字符串，转成yyyy-MM-dd HH:mm:SS格式
    function dateToStr(datetime){
        var dateTime = new Date(datetime);
        var year = dateTime.getFullYear();
        var month = dateTime.getMonth()+1;//js从0开始取
        var date = dateTime.getDate();
        var hour = dateTime.getHours();
        var minutes = dateTime.getMinutes();
        var second = dateTime.getSeconds();

        if(month<10){
            month = "0" + month;
        }
        if(date<10){
            date = "0" + date;
        }
        if(hour <10){
            hour = "0" + hour;
        }
        if(minutes <10){
            minutes = "0" + minutes;
        }
        if(second <10){
            second = "0" + second ;
        }

        return year+"-"+month+"-"+date+" "+hour+":"+minutes+":"+second;
    }