blocks|key|503104|text|你可以试试net-telent-date，它有PARSE-TIME，我想它会做你想做的事情。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|503105|entityMap|0|LINK|mutability|MUTABLE|url|http://www.cliki.net/net-telent-date^0|N|A|5|F|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]]|D|@$9|Q|A|R|1|S]]|E|$]]|$1|F|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

You could try <a href="http://www.cliki.net/net-telent-date" rel="nofollow noreferrer">net-telent-date</a>, which has <code>PARSE-TIME</code> which I think will do what you want.

blocks|key|2407081|text|这个答案来得太晚了，但local-time库功能强大且被广泛使用。它基于文章The+long+painful+history+of+time。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2407082|It+supports：|2407083|2407084|Time+|ordered-list-item|2407085|+date+arithmetic|2407086|ISO8601时间串格式化输出和解析|2407087|Reader宏，以将时间串直接嵌入时区处理的代码中(将读取unix+tzfile+|2407088|+universal和unix+time+|2407089|+date+calculation|2407090|2407091|entityMap|0|LINK|mutability|MUTABLE|url|https://www.common-lisp.net/project/local-time/manual.html#Introduction|1|http://naggum.no/lugm-time.html|2|https://common-lisp.net/project/local-time/^0|B|A|0|12|W|1|0|3|8|2|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|16|8|@]|9|@$A|17|B|18|1|19]|$A|1A|B|1B|1|1C]]|C|$]]|$1|D|3|E|5|6|7|1D|8|@]|9|@$A|1E|B|1F|1|1G]]|C|$]]|$1|F|3|-4|5|6|7|1H|8|@]|9|@]|C|$]]|$1|G|3|H|5|I|7|1I|8|@]|9|@]|C|$]]|$1|J|3|K|5|6|7|1J|8|@]|9|@]|C|$]]|$1|L|3|M|5|I|7|1K|8|@]|9|@]|C|$]]|$1|N|3|O|5|I|7|1L|8|@]|9|@]|C|$]]|$1|P|3|Q|5|6|7|1M|8|@]|9|@]|C|$]]|$1|R|3|S|5|I|7|1N|8|@]|9|@]|C|$]]|$1|T|3|-4|5|6|7|1O|8|@]|9|@]|C|$]]|$1|U|3|-4|5|6|7|1P|8|@]|9|@]|C|$]]]|V|$W|$5|X|Y|Z|C|$10|11]]|12|$5|X|Y|Z|C|$10|13]]|14|$5|X|Y|Z|C|$10|15]]]]

This answer is very late but the <a href="https://www.common-lisp.net/project/local-time/manual.html#Introduction" rel="noreferrer">local-time</a> library is featureful and widely used. It is based on the article <a href="http://naggum.no/lugm-time.html" rel="noreferrer">The long painful history of time</a>. 

It <a href="https://common-lisp.net/project/local-time/" rel="noreferrer">supports</a> :

<ol>
<li>Time and date arithmetic</li>
<li>ISO 8601 timestring formatted output and parsing</li>
<li>Reader macros to embed timestrings directly in code</li>
<li>Timezone handling (will read unix tzfile format)</li>
<li>Conversion between universal and unix time epochs</li>
<li>Julian date calculation</li>
</ol>

blocks|key|503080|text|请参阅Common+Lisp的net-telent-date和simple-date-time库。前者有一个可以使用的parse-time函数(参见parse-time.lisp)。这两个都包含在QuickLisp库集合中。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|503081|entityMap|0|LINK|mutability|MUTABLE|url|http://www.cliki.net/net-telent-date|1|https://github.com/quek/simple-date-time|2|http://www.quicklisp.org/^0|1N|A|F|F|0|V|G|1|2Q|9|2|0^^$0|@$1|2|3|4|5|6|7|R|8|@$9|S|A|T|B|C]]|D|@$9|U|A|V|1|W]|$9|X|A|Y|1|Z]|$9|10|A|11|1|12]]|E|$]]|$1|F|3|-4|5|6|7|13|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]|N|$5|I|J|K|E|$L|O]]|P|$5|I|J|K|E|$L|Q]]]]

See the <a href="http://www.cliki.net/net-telent-date" rel="nofollow">net-telent-date</a> and <a href="https://github.com/quek/simple-date-time" rel="nofollow">simple-date-time</a> libraries for Common Lisp. The former has a <code>parse-time</code> function you can use (see parse-time.lisp). Both are included in the <a href="http://www.quicklisp.org/" rel="nofollow">QuickLisp</a> library collection.

blocks|key|4196396|text|许多实现都有一个UNIX接口，在相同的情况下，这包括strptime函数。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4196397|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Many implementations have a UNIX interface and, in same cases, this includes the strptime function.

blocks|key|503208|text|Antik处理日期和时间，并包含日期/时间解析器。结果是一个"timepoint“，默认情况下是UTC+(CL的"universal-time”是不同的，但它可以转换成这个值)。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|503209|entityMap|0|LINK|mutability|MUTABLE|url|http://www.common-lisp.net/project/antik/^0|0|5|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

<a href="http://www.common-lisp.net/project/antik/" rel="nofollow">Antik</a> handles dates and times and includes date/time parsers. The result is a "timepoint" which by default is UTC (CL's "universal-time" is something different, but it can be converted to that).

blocks|key|2122682|text|我使用本地时间和cl-date-time-parser|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2122683|edit:和用于解析自然语言日期和时间的chronicity。|2122684|(local-time:parse-timestring+"2019-11-13T18:09:06.313650%2B01:00")++;;+OK
(local-time:parse-timestring+"2019-11-13")+;;OK|code-block|syntax|javascript|2122685|默认情况下，使用本地时间会失败：|2122686|(local-time:parse-timestring+"2019/11/13")|2122687|但它适用于Chronicity：|2122688|(chronicity:parse+"2019/11/13")
@2019-11-13T00:00:00.000000%2B01:00|2122689|我们可以将本地时间的日期分隔符设置为"/"：|2122690|(local-time:parse-timestring+"2019/11/13"+:date-separator+#\/)+;;+OK|2122691|还有时间和日期时间分隔符。|2122692|现在像“Wed+Nov+13+18:13:15+2019”这样的格式将会失败。我们将使用cl-date-time-parser库：|style|CODE|2122693|(cl-date-time-parser:parse-date-time+"Wed+Nov+13+18:13:15+2019")
;;+3782657595
;;+0|2122694|它返回世界时，反过来，我们可以用本地时间库摄取该时间：|2122695|(local-time:universal-to-timestamp+*)
;;+@2019-11-13T19:13:15.000000%2B01:00|2122696|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/tkych/cl-date-time-parser|1|https://github.com/chaitanyagupta/chronicity^0|8|J|0|0|K|A|1|0|0|0|0|0|0|0|0|0|18|J|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1I|8|@]|9|@$A|1J|B|1K|1|1L]]|C|$]]|$1|D|3|E|5|6|7|1M|8|@]|9|@$A|1N|B|1O|1|1P]]|C|$]]|$1|F|3|G|5|H|7|1Q|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|1R|8|@]|9|@]|C|$]]|$1|M|3|N|5|H|7|1S|8|@]|9|@]|C|$I|J]]|$1|O|3|P|5|6|7|1T|8|@]|9|@]|C|$]]|$1|Q|3|R|5|H|7|1U|8|@]|9|@]|C|$I|J]]|$1|S|3|T|5|6|7|1V|8|@]|9|@]|C|$]]|$1|U|3|V|5|H|7|1W|8|@]|9|@]|C|$I|J]]|$1|W|3|X|5|6|7|1X|8|@]|9|@]|C|$]]|$1|Y|3|Z|5|6|7|1Y|8|@$A|1Z|B|20|10|11]]|9|@]|C|$]]|$1|12|3|13|5|H|7|21|8|@]|9|@]|C|$I|J]]|$1|14|3|15|5|6|7|22|8|@]|9|@]|C|$]]|$1|16|3|17|5|H|7|23|8|@]|9|@]|C|$I|J]]|$1|18|3|-4|5|6|7|24|8|@]|9|@]|C|$]]]|19|$1A|$5|1B|1C|1D|C|$1E|1F]]|1G|$5|1B|1C|1D|C|$1E|1H]]]]

I use local-time and <a href="https://github.com/tkych/cl-date-time-parser" rel="nofollow noreferrer">cl-date-time-parser</a>:

edit: and <a href="https://github.com/chaitanyagupta/chronicity" rel="nofollow noreferrer">chronicity</a> for parsing natural language dates and times.

<pre><code>(local-time:parse-timestring "2019-11-13T18:09:06.313650+01:00") ;; OK
(local-time:parse-timestring "2019-11-13") ;;OK
</code></pre>

This fails with local-time by default:

<pre><code>(local-time:parse-timestring "2019/11/13")
</code></pre>

but it works with Chronicity:

<pre><code>(chronicity:parse "2019/11/13")
@2019-11-13T00:00:00.000000+01:00
</code></pre>

and we can set the date separator of local-time to "/":

<pre><code>(local-time:parse-timestring "2019/11/13" :date-separator #\/) ;; OK
</code></pre>

There is also the time and datetime separators.

Now a format like ""Wed Nov 13 18:13:15 2019" will fail. We'll use the
<code>cl-date-time-parser</code> library:

<pre><code>(cl-date-time-parser:parse-date-time "Wed Nov 13 18:13:15 2019")
;; 3782657595
;; 0
</code></pre>

It returns the universal time which, in turn, we can ingest with the
local-time library:

<pre class="lang-lisp prettyprint-override"><code>(local-time:universal-to-timestamp *)
;; @2019-11-13T19:13:15.000000+01:00
</code></pre>

I'm writing a simple web scraper in Common Lisp (SBCL) as a learning exercise, &amp; would like to sort by date. To do this, I'll need to parse dates in the format "MM/DD/YYYY" into universal time.

I could simply tokenise the string &amp; pass the bits into <code>encode-universal-time</code>, but I figure that there must be a built-in function (or popular third-party package) for date parsing. I'd greatly appreciate someone recommending one :-)

Package to parse dates in Common Lisp?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在用Common Lisp (SBCL)编写一个简单的web scraper作为学习练习，并希望按日期排序。为此，我需要将"MM/DD/YYYY“格式的日期解析为通用时间。我可以简单地将字符串标记并将位传递给encode-universal-time，但我认为必须有一个内置函数(或流行的第三方包)用于日期解析。如果有人推荐我，我将非常感谢:-)

问包在Common Lisp中解析日期？
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