ruby-on-rails - 如何在 Rails 3 中用 'hours:minutes:seconds' 显示时间？

Question

我花了很多时间来回答我的问题，但我什么也没找到。

如何以“小时:分钟:秒”显示时间格式，例如:20:30:12？我试图将区域设置从 >time: "%H:%M"< 更改为 >time: "%H:%M:%S"< 因为我看到 %S 是秒，但没有效果:(

我做错了什么？

感谢您的回答!

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"