js 时间戳转日期

timestampToTime(10位时间戳)
function timestampToTime(timestamp) {
    var date = new Date(timestamp * 1000); 

    Y = date.getFullYear() + '-';
    M = (date.getMonth() + 1 < 10 ? '0' + (date.getMonth() + 1) : date.getMonth() + 1) + '-';
    D = change(date.getDate()) + ' ';
    h = change(date.getHours()) + ':';
    m = change(date.getMinutes()) + ':';
    s = change(date.getSeconds());
    return Y + M + D + h + m + s;
}

function change(t) {
    if (t < 10) {
        return "0" + t;
    } else {
        return t;
    }
}