如何在不同编程语言中获取现在的Unix时间戳(Unix timestamp)？

2012-03-27 金城 2367

Java	time
JavaScript	Math.round(new Date().getTime()/1000) getTime()返回数值的单位是毫秒
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然后time.time()
Ruby	获取Unix时间戳：Time.now或Time.new 显示Unix时间戳：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())