将字符串转换为clojure中的日期 [英] converting strings into dates in clojure
问题描述
我有以下格式的字符串2013-02-20T17:24:33Z
和Mon Feb 25 02:42:27 +0000 2013
。
I have strings in the following format "2013-02-20T17:24:33Z"
and "Mon Feb 25 02:42:27 +0000 2013"
.
是否有一种快速方法将这些转换为日期时间格式,以便可以测试它们是否相等和/排序。
Is there a quick way to convert these into date time format so that they can be tested for equality and/or sorted.
clj-time允许我使用此格式(date-time 1986 10 14 4 3 27 456)
。但是要实现这个我将不得不解析两个上面的字符串。上述字符串是标准格式,有没有办法直接将它们转换为日期时间对象?
clj-time does allow me to this format (date-time 1986 10 14 4 3 27 456)
. However to achieve this I will have to parse the two above strings. The above strings being standard formats, is there a way to directly convert them into date time objects?
谢谢,
Murtaza
Thanks, Murtaza
推荐答案
clj-time已定义标准格式化程序,请参阅 clj-time.format / show-formatters
你的第二种格式不是一个'标准'格式,尽管clj时间(虽然它看起来可疑接近rfc822)。
clj-time has standard formatters defined, see clj-time.format/show-formatters
, but your second format is not a 'standard' format as far as clj-time is concerned (although it does look suspiciously close to rfc822). You can create a custom formatter tho...
(use 'clj-time.format)
(parse (formatters :date-time-no-ms) "2013-02-20T17:24:33Z")
#<DateTime 2013-02-20T17:24:33.000Z>
(parse (formatter "E MMM dd hh:mm:ss Z YYYY") "Mon Feb 25 02:42:27 +0000 2013" )
#<DateTime 2013-02-25T02:42:27.000Z>
(show-formatters)
:basic-date 20130228
:basic-date-time 20130228T114047.213Z
:basic-date-time-no-ms 20130228T114047Z
:basic-ordinal-date 2013059
:basic-ordinal-date-time 2013059T114047.213Z
:basic-ordinal-date-time-no-ms 2013059T114047Z
:basic-t-time T114047.213Z
:basic-t-time-no-ms T114047Z
:basic-time 114047.213Z
:basic-time-no-ms 114047Z
:basic-week-date 2013W094
:basic-week-date-time 2013W094T114047.213Z
:basic-week-date-time-no-ms 2013W094T114047Z
:date 2013-02-28
:date-hour 2013-02-28T11
:date-hour-minute 2013-02-28T11:40
:date-hour-minute-second 2013-02-28T11:40:47
:date-hour-minute-second-fraction 2013-02-28T11:40:47.213
:date-hour-minute-second-ms 2013-02-28T11:40:47.213
:date-time 2013-02-28T11:40:47.213Z
:date-time-no-ms 2013-02-28T11:40:47Z
:hour 11
:hour-minute 11:40
:hour-minute-second 11:40:47
:hour-minute-second-fraction 11:40:47.213
:hour-minute-second-ms 11:40:47.213
:ordinal-date 2013-059
:ordinal-date-time 2013-059T11:40:47.213Z
:ordinal-date-time-no-ms 2013-059T11:40:47Z
:rfc822 Thu, 28 Feb 2013 11:40:47 +0000
:t-time T11:40:47.213Z
:t-time-no-ms T11:40:47Z
:time 11:40:47.213Z
:time-no-ms 11:40:47Z
:week-date 2013-W09-4
:week-date-time 2013-W09-4T11:40:47.213Z
:week-date-time-no-ms 2013-W09-4T11:40:47Z
:weekyear 2013
:weekyear-week 2013-W09
:weekyear-week-day 2013-W09-4
:year 2013
:year-month 2013-02
:year-month-day 2013-02-28
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