如何在Rails 3中以'hours：minutes：seconds'显示时间？

Question

我花了很多时间来回答我的问题，但我找不到任何东西。

如何以'小时：分：秒'显示时间格式，例如：20：30：12？ 我试图从>时间改变语言环境：“％H：％M”<到>时间：“％H：％M：％S”<因为我看到％S是秒，但是没有效果:(

我做错了什么？

谢谢你的回答！

Answer 1

使用Time＃strftime方法

在你的情况下：

t = Time.now
t.strftime("%H:%M:%S")   #=> "12:09:34"

不同的格式：

 %a - The abbreviated weekday name (``Sun'')
  %A - The  full  weekday  name (``Sunday'')
  %b - The abbreviated month name (``Jan'')
  %B - The  full  month  name (``January'')
  %c - The preferred local date and time representation
  %d - Day of the month (01..31)
  %H - Hour of the day, 24-hour clock (00..23)
  %I - Hour of the day, 12-hour clock (01..12)
  %j - Day of the year (001..366)
  %m - Month of the year (01..12)
  %M - Minute of the hour (00..59)
  %p - Meridian indicator (``AM''  or  ``PM'')
  %S - Second of the minute (00..60)
  %U - Week  number  of the current year,
          starting with the first Sunday as the first
          day of the first week (00..53)
  %W - Week  number  of the current year,
          starting with the first Monday as the first
          day of the first week (00..53)
  %w - Day of the week (Sunday is 0, 0..6)
  %x - Preferred representation for the date alone, no time
  %X - Preferred representation for the time alone, no date
  %y - Year without a century (00..99)
  %Y - Year with century
  %Z - Time zone name
  %% - Literal ``%'' character

然后你可以创建这样的格式：

t = Time.now
   t.strftime("Printed on %m/%d/%Y")   #=> "Printed on 04/09/2003"
   t.strftime("at %I:%M%p")            #=> "at 08:56AM"

Answer 2

Time.now.strftime("%H:%M:%S")