Unix时间戳转换工具

现在的Unix时间戳(Unix timestamp)是： 1598246776 开始 停止 刷新

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如何在不同编程语言中获取现在的Unix时间戳(Unix timestamp)？
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())
其他操作系统
(如果Perl被安装在系统中)		 命令行状态：perl -e "print time"
如何在不同编程语言中实现Unix时间戳( Unix timestamp) → 普通时间？
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) 然后commonTime = unixTimestamp.toLocaleString()
Linux date -d @ Unix timestamp
MySQL from_unixtime( Unix timestamp)
Perl 先my $time = Unix timestamp 然后my ($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 然后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")
其他操作系统
(如果Perl被安装在系统中)		 命令行状态：perl -e "print scalar(localtime( Unix timestamp))"
如何在不同编程语言中实现普通时间 → Unix时间戳( 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)
时间格式: YYYY-MM-DD HH:MM:SS 或 YYMMDD 或 YYYYMMDD
Perl 先use Time::Local 然后my $time = timelocal($sec, $min, $hour, $day, $month, $year);
PHP mktime( hour, minute, second, month, day, year)
PostgreSQL SELECT extract(epoch FROM date(' YYYY-MM-DD HH:MM:SS'));
Python 先import time 然后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)