时间戳转日期

//时间戳转日期
function timestampToTime(timestamp) {
    var date = new Date(timestamp); //时间戳为10位需*1000，时间戳为13位的话不需乘1000
    Y = date.getFullYear() + '-';
    M = (date.getMonth() + 1 < 10 ? '0' + (date.getMonth() + 1) : date.getMonth() + 1) + '-';
    D = (date.getDate() < 10 ? "0" + date.getDate() : date.getDate()) + ' ';
    h = (date.getHours() < 10 ? "0" + date.getHours() : date.getHours()) + ':';
    m = (date.getMinutes() < 10 ? "0" + date.getMinutes() : date.getMinutes()) + ':';
    s = date.getSeconds() < 10 ? "0" + date.getSeconds() : date.getSeconds();
    return Y + M + D + h + m + s;
}

//转时间
function dateToTimes(timestamp) {
    var date = timestampToTime(timestamp);
    var lastIndex = date.lastIndexOf(' ');
    var time = date.substring(lastIndex + 1);
    return time;
}