Ruby 2.3.0 リファレンスマニュアル > ライブラリ一覧 > 組み込みライブラリ > Timeクラス > strftime
strftime(format) -> String
[permalink][rdoc]時刻を format 文字列に従って文字列に変換した結果を返します。
このメソッドは strftime(3) や glibcの仕様を参考に作成されており、以下のオプションが利用できます。
EとOは無視されます。
t = Time.now #=> 2010-09-05 15:41:17 0900
t.strftime("Printed on %m/%d/%Y") #=> "Printed on 09/05/2010"
t.strftime("Printed on %m/%-d/%_6Y") #=> "Printed on 09/5/ 2010"
t.strftime("at %I:%M%p") #=> "at 03:41PM"
t.strftime("at %I:%M%#p") #=> "at 03:41pm"
t = Time.new(2001,2,3,4,5,6,"+09:00")
t.strftime("%Y%m%d") # => 20010203 Calendar date (basic)
t.strftime("%F") # => 2001-02-03 Calendar date (extended)
t.strftime("%Y-%m") # => 2001-02 Calendar date, reduced accuracy, specific month
t.strftime("%Y") # => 2001 Calendar date, reduced accuracy, specific year
t.strftime("%C") # => 20 Calendar date, reduced accuracy, specific century
t.strftime("%Y%j") # => 2001034 Ordinal date (basic)
t.strftime("%Y-%j") # => 2001-034 Ordinal date (extended)
t.strftime("%GW%V%u") # => 2001W056 Week date (basic)
t.strftime("%G-W%V-%u") # => 2001-W05-6 Week date (extended)
t.strftime("%GW%V") # => 2001W05 Week date, reduced accuracy, specific week (basic)
t.strftime("%G-W%V") # => 2001-W05 Week date, reduced accuracy, specific week (extended)
t.strftime("%H%M%S") # => 040506 Local time (basic)
t.strftime("%T") # => 04:05:06 Local time (extended)
t.strftime("%H%M") # => 0405 Local time, reduced accuracy, specific minute (basic)
t.strftime("%H:%M") # => 04:05 Local time, reduced accuracy, specific minute (extended)
t.strftime("%H") # => 04 Local time, reduced accuracy, specific hour
t.strftime("%H%M%S,%L") # => 040506,000 Local time with decimal fraction, comma as decimal sign (basic)
t.strftime("%T,%L") # => 04:05:06,000 Local time with decimal fraction, comma as decimal sign (extended)
t.strftime("%H%M%S.%L") # => 040506.000 Local time with decimal fraction, full stop as decimal sign (basic)
t.strftime("%T.%L") # => 04:05:06.000 Local time with decimal fraction, full stop as decimal sign (extended)
t.strftime("%H%M%S%z") # => 040506+0900 Local time and the difference from UTC (basic)
t.strftime("%T%:z") # => 04:05:06+09:00 Local time and the difference from UTC (extended)
t.strftime("%Y%m%dT%H%M%S%z") # => 20010203T040506+0900 Date and time of day for calendar date (basic)
t.strftime("%FT%T%:z") # => 2001-02-03T04:05:06+09:00 Date and time of day for calendar date (extended)
t.strftime("%Y%jT%H%M%S%z") # => 2001034T040506+0900 Date and time of day for ordinal date (basic)
t.strftime("%Y-%jT%T%:z") # => 2001-034T04:05:06+09:00 Date and time of day for ordinal date (extended)
t.strftime("%GW%V%uT%H%M%S%z") # => 2001W056T040506+0900 Date and time of day for week date (basic)
t.strftime("%G-W%V-%uT%T%:z") # => 2001-W05-6T04:05:06+09:00 Date and time of day for week date (extended)
t.strftime("%Y%m%dT%H%M") # => 20010203T0405 Calendar date and local time (basic)
t.strftime("%FT%R") # => 2001-02-03T04:05 Calendar date and local time (extended)
t.strftime("%Y%jT%H%MZ") # => 2001034T0405Z Ordinal date and UTC of day (basic)
t.strftime("%Y-%jT%RZ") # => 2001-034T04:05Z Ordinal date and UTC of day (extended)
t.strftime("%GW%V%uT%H%M%z") # => 2001W056T0405+0900 Week date and local time and difference from UTC (basic)
t.strftime("%G-W%V-%uT%R%:z") # => 2001-W05-6T04:05+09:00 Week date and local time and difference from UTC (extended)