python各种语言间时间的转化实现代码_Python

一基本知识

millisecond 毫秒
microsecond 微秒
nanosecond 纳秒
1秒=1000毫秒 1毫秒=1000微秒 1微秒=1000纳秒

二 perl

perl中可以使用time或localtime来获得时间，time返回从1970年1月1日0点的秒数，localtime返回当前时间的字符串表示，或者年月日等得tuple表示。

									#!/usr/bin/perl

									use strict;

									use warnings;

									use POSIX qw(strftime);

									# seconds from 1970.01.01 00:00:00

									my $ti = time();

									print $ti;

									print "\n";

									print strftime("%Y-%m-%d %H:%M:%S\n", localtime($ti));

									#1310623469

									#2011-07-14 14:03:58

									my $t = localtime();

									print $t;

									print "\n";

									#Thu Jul 14 12:25:16 2011

									my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday, $isdst)=localtime();

									print $year;

									print "\n";

									#111

									print strftime("%Y-%m-%d %H:%M:%S\n", localtime());

									#2011-07-14 12:26:01

三 c#
1tick = 100 nanosecond

									using System;

									using System.Collections.Generic;

									using System.Linq;

									using System.Text;

									namespace MyTest

									{

									  class Program

									  {

									    static void DateTimeTest()

									    {

									      DateTime dt2 = DateTime.Now;

									      Console.WriteLine(dt2.Ticks);

									      Console.WriteLine(dt2.ToString("MM/dd/yyyy hh:mm:ss"));

									    }

									    static DateTime? ConvertPerlTimeToDateTime(string perltime)

									    {

									      DateTime? dt = null;

									      //perl time variable : seconds from 1970.01.01 00:00:00 

									      string sdt = perltime;

									      long ldt = 0;

									      if (long.TryParse(sdt, out ldt))

									      {

									        long ldt2 = new DateTime(1970, 1, 1).Ticks + ldt * 1000 * 1000 * 10;

									         dt = new DateTime(ldt2, DateTimeKind.Local);

									        Console.WriteLine(dt.Value.ToString("MM/dd/yyyy hh:mm:ss"));

									      }

									      return dt;

									    }

									    static void Main(string[] args)

									    {

									      DateTimeTest();

									      ConvertPerlTimeToDateTime("1309423883");

									      //634462479788396720

									      //07/14/2011 01:46:18

									      //06/30/2011 08:51:23

									    }

									  }

									}

四 python

python的perl相似，time也是从1970年1月1日开始的秒数。

									import time

									ISOTIMEFORMAT='%Y-%m-%d %X'

									# seconds from 1970.01.01 00:00:00

									t = time.time()

									print (t)

									print time.strftime(ISOTIMEFORMAT,time.localtime(t))

									#1310623143.12

									#2011-07-14 13:59:03

									(year,mon,day,hour,min,sec,wday,yday,isdst) = time.localtime()

									print (year)

									print (time.strftime(ISOTIMEFORMAT, time.localtime()))

									#2011

									#2011-07-14 13:59:03

python各种语言间时间的转化实现代码

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