獲取當(dāng)前日期和時(shí)間:
以下是一個(gè)簡(jiǎn)單的例子，以獲得當(dāng)前的日期和時(shí)間：
#!/usr/bin/ruby -wtime1 = Time.newputs "Current Time : " + time1.inspect# Time.now is a synonym:time2 = Time.nowputs "Current Time : " + time2.inspect
這將產(chǎn)生以下結(jié)果：
Current Time : Mon Jun 02 12:02:39 -0700 2008Current Time : Mon Jun 02 12:02:39 -0700 2008
獲取組件的日期和時(shí)間：
我們可以用 Time 對(duì)象來(lái)獲取日期和時(shí)間的各個(gè)組成部分。下面的例子顯示相同的：
#!/usr/bin/ruby -wtime = Time.new# Components of a Timeputs "Current Time : " + time.inspectputs time.year # => Year of the date puts time.month # => Month of the date (1 to 12)puts time.day # => Day of the date (1 to 31 )puts time.wday # => 0: Day of week: 0 is Sundayputs time.yday # => 365: Day of yearputs time.hour # => 23: 24-hour clockputs time.min # => 59puts time.sec # => 59puts time.usec # => 999999: microsecondsputs time.zone # => "UTC": timezone name
這將產(chǎn)生以下結(jié)果：
Current Time : Mon Jun 02 12:03:08 -0700 200820086211541238247476UTC
Time.utc，Time.gm和Time.local函數(shù)：
可用于這兩個(gè)函數(shù)以標(biāo)準(zhǔn)格式來(lái)格式化日期如下：
# July 8, 2008Time.local(2008, 7, 8) # July 8, 2008, 09:10am, local timeTime.local(2008, 7, 8, 9, 10) # July 8, 2008, 09:10 UTCTime.utc(2008, 7, 8, 9, 10) # July 8, 2008, 09:10:11 GMT (same as UTC)Time.gm(2008, 7, 8, 9, 10, 11)
下面的例子，在一個(gè)數(shù)組來(lái)獲取所有組件按以下格式：
[sec,min,hour,day,month,year,wday,yday,isdst,zone]
嘗試以下操作：
#!/usr/bin/ruby -wtime = Time.newvalues = time.to_ap values
這將產(chǎn)生以下結(jié)果：
[26, 10, 12, 2, 6, 2008, 1, 154, false, "MST"]
這個(gè)數(shù)組可以傳遞給Time.utc或Time.local函數(shù)得到不同的日期格式如下：
#!/usr/bin/ruby -wtime = Time.newvalues = time.to_aputs Time.utc(*values)
這將產(chǎn)生以下結(jié)果：
Mon Jun 02 12:15:36 UTC 2008
跟隨著的方式來(lái)獲得內(nèi)部表示（依賴于平臺(tái)）歷元以來(lái)的秒數(shù)時(shí)間：
# Returns number of seconds since epochtime = Time.now.to_i # Convert number of seconds into Time object.Time.at(time)# Returns second since epoch which includes microsecondstime = Time.now.to_f
時(shí)區(qū)和夏令時(shí)：
可以使用一個(gè) Time 對(duì)象來(lái)獲取相關(guān)的所有信息的時(shí)區(qū)和夏令如下：
time = Time.new# Here is the interpretationtime.zone # => "UTC": return the timezonetime.utc_offset # => 0: UTC is 0 seconds offset from UTCtime.zone # => "PST" (or whatever your timezone is)time.isdst # => false: If UTC does not have DST.time.utc? # => true: if t is in UTC time zonetime.localtime # Convert to local timezone.time.gmtime # Convert back to UTC.time.getlocal # Return a new Time object in local zonetime.getutc # Return a new Time object in UTC
格式化時(shí)間和日期：
有各種各樣的方式來(lái)格式化日期和時(shí)間。下面是一個(gè)例子，說(shuō)明幾個(gè)：
#!/usr/bin/ruby -wtime = Time.newputs time.to_sputs time.ctimeputs time.localtimeputs time.strftime("%Y-%m-%d %H:%M:%S")這將產(chǎn)生以下結(jié)果：
Mon Jun 02 12:35:19 -0700 2008Mon Jun 2 12:35:19 2008Mon Jun 02 12:35:19 -0700 20082008-06-02 12:35:19
時(shí)間算術(shù)：
可以在時(shí)間上做簡(jiǎn)單的算術(shù)如下：
now = Time.now # Current timeputs nowpast = now - 10 # 10 seconds ago. Time - number => Timeputs pastfuture = now + 10 # 10 seconds from now Time + number => Timeputs futurediff = future - now # => 10 Time - Time => number of secondsputs diff
這將產(chǎn)生以下結(jié)果：
Thu Aug 01 20:57:05 -0700 2013Thu Aug 01 20:56:55 -0700 2013Thu Aug 01 20:57:15 -0700 201310.0
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