js中如何格式化时间戳

下面是封装好的一个函数,直接上代码

function trans(unixTime, isFull, timeZone) {
    if (typeof (timeZone) == 'number')
    {
        unixTime = parseInt(unixTime) + parseInt(timeZone) * 60 * 60;
    }
    var time = new Date(unixTime * 1000);
    var ymdhis = "";
    ymdhis += time.getUTCFullYear() + "-";
    ymdhis += (time.getUTCMonth()+1) + "-";
    ymdhis += time.getUTCDate();
    if (isFull === true)
    {
        ymdhis += " " + time.getUTCHours() + ":";
        ymdhis += time.getUTCMinutes() + ":";
        ymdhis += time.getUTCSeconds();
    }
    return ymdhis;
}