如何在不一樣編程語言中獲取如今的Unix時間戳(Unix timestamp)？

Java	time
JavaScript	Math.round(new Date().getTime()/1000) 之因此除以1000是由於getTime()返回數值的單位是毫秒
Microsoft .NET / C#	epoch = (DateTime.Now.ToUniversalTime().Ticks - 621355968000000000) / 10000000
MySQL	SELECT unix_timestamp(now())
Perl	time
PHP	time()
PostgreSQL	SELECT extract(epoch FROM now())
Python	先 import time 而後 time.time()
Ruby	獲取Unix時間戳：Time.now 或 Time.new 顯示Unix時間戳：Time.now.to_i
SQL Server	SELECT DATEDIFF(s, '1970-01-01 00:00:00', GETUTCDATE())
Unix / Linux	date +%s
VBScript / ASP	DateDiff("s", "01/01/1970 00:00:00", Now())
其餘操做系統 (若是Perl被安裝在系統中)	命令行狀態：perl -e "print time"

mysql的時間戳   SELECT UNIX_TIMESTAMP(NOW())  這個是針對秒的,結果是 1390208619

如何在不一樣編程語言中實現Unix時間戳(Unix timestamp) → 普通時間？

Java	String date = new java.text.SimpleDateFormat("dd/MM/yyyy HH:mm:ss").format(new java.util.Date(Unix timestamp * 1000))
JavaScript	先 var unixTimestamp = new Date(Unix timestamp * 1000) 而後 commonTime = unixTimestamp.toLocaleString()
Linux	date -d @Unix timestamp
MySQL	from_unixtime(Unix timestamp)
Perl	先 my $time = Unix timestamp 而後 my ($sec, $min, $hour, $day, $month, $year) = (localtime($time))[0,1,2,3,4,5,6]
PHP	date('r', Unix timestamp)
PostgreSQL	SELECT TIMESTAMP WITH TIME ZONE 'epoch' + Unix timestamp) * INTERVAL '1 second';
Python	先 import time 而後 time.gmtime(Unix timestamp)
Ruby	Time.at(Unix timestamp)
SQL Server	DATEADD(s, Unix timestamp, '1970-01-01 00:00:00')
VBScript / ASP	DateAdd("s", Unix timestamp, "01/01/1970 00:00:00")
其餘操做系統 (若是Perl被安裝在系統中)	命令行狀態：perl -e "print scalar(localtime(Unix timestamp))"

例如msyql裏面   SELECT FROM_UNIXTIME(1390208923)   結果是  2014-01-20 17:08:43

如何在不一樣編程語言中實現普通時間 → Unix時間戳(Unix timestamp)？

Java	long epoch = new java.text.SimpleDateFormat("dd/MM/yyyy HH:mm:ss").parse("01/01/1970 01:00:00");
JavaScript	var commonTime = new Date(Date.UTC(year, month - 1, day, hour, minute, second))
MySQL	SELECT unix_timestamp(time) 時間格式: YYYY-MM-DD HH:MM:SS 或 YYMMDD 或 YYYYMMDD
Perl	先 use Time::Local 而後 my $time = timelocal($sec, $min, $hour, $day, $month, $year);
PHP	mktime(hour, minute, second, day, month, year)
PostgreSQL	SELECT extract(epoch FROM date('YYYY-MM-DD HH:MM:SS'));
Python	先 import time 而後 int(time.mktime(time.strptime('YYYY-MM-DD HH:MM:SS', '%Y-%m-%d %H:%M:%S')))
Ruby	Time.local(year, month, day, hour, minute, second)
SQL Server	SELECT DATEDIFF(s, '1970-01-01 00:00:00', time)
Unix / Linux	date +%s -d"Jan 1, 1970 00:00:01"
VBScript / ASP	DateDiff("s", "01/01/1970 00:00:00", time)

例如在mysql裏面是   SELECT UNIX_TIMESTAMP('2013-01-05 18:05:20')   得到的時間戳的結果是   1357380320