时间戳格式化

/** 
 * 时间戳格式化
 * @param time:时间戳13位 ; Delimiter : 分隔符（ 例子： '-' , '/' ）
 * */
 
function formatDate( time , Delimiter ) { 
    Delimiter = Delimiter || '-';
    var now = new Date(time); 

    var year=now.getFullYear() + ''; 
    var month=now.getMonth()+1 + ''; 
    var date=now.getDate() + ''; 
    var hour=now.getHours() + ''; 
    var minute=now.getMinutes() + ''; 
    var second=now.getSeconds() + ''; 

    // 补0
    month = month.length < 2 ? '0' + month : month;
    date = date.length < 2 ? '0' + date : date;
    hour = hour.length < 2 ? '0' + hour : hour;
    minute = minute.length < 2 ? '0' + minute : minute;
    second = second.length < 2 ? '0' + second : second;

    return year+ Delimiter + month + Delimiter + date + " " + hour+":"+minute+":"+second; 
} 

formatDate( 1526465331916 , '-' );  //  "2018-05-16 18:08:51"