在Clojure中获取日期和时间的最佳方法是什么？

I need to log some events on a Clojure Client-Server scenario, but it seems to me that Clojure does not provide a date/time function. Can any one confirm this or I am missing something here?! If I am correct then I need to use java interop, right?

我需要在Clojure Client-Server方案中记录一些事件,但在我看来,Clojure不提供日期/时间功能。任何人都可以证实这一点,或者我在这里遗漏了什么?!如果我是正确的那么我需要使用java互操作,对吧?

5 个解决方案

#1

If all you need is to get the current time and date for your logger, then this function is OK:

如果您只需要获取记录器的当前时间和日期,那么此功能就可以了:

 (defn now [] (new java.util.Date))

Now that you mentioned this, it would be useful to have support for immutable Date objects.

既然你提到了这一点,那么支持不可变的Date对象会很有用。

#2

There is a Clojure-wrapper library for Joda-Time. Or you'll have to use java interop with the standard Java API.

Joda-Time有一个Clojure包装库。或者您必须使用Java interop与标准Java API。

#3

Java 1.8 added the java.time package to the core JDK to clean up many of the frustrations with the state of date & time in Java. Since java.time is now a widely available part of core Java with a much improved API, I would encourage you to give it the first look when writing new date & time code.

Java 1.8将java.time包添加到核心JDK中,以清除Java中日期和时间状态的许多挫折。由于java.time现在是核心Java的一个广泛可用的部分,具有大大改进的API,我建议您在编写新的日期和时间代码时首先考虑它。

Example:

(java.time.LocalDateTime/now)

#4

With clj-time, the Clojure library that wraps the Java Joda Time library, you could use code like the following:

使用clj-time,包装Java Joda Time库的Clojure库,您可以使用如下代码:

(require '[clj-time.core :as time])
(require '[clj-time.format :as time-format])

(time/now) => #<DateTime 2013-03-31T03:23:47.328Z>

(def time-formatter (time-format/formatters :basic-date-time))  ;; ISO 8601 UTC format
(time-format/unparse custom-formatter (date-time 2010 10 3)) => "20101003T000000.000Z"

One benefit of Joda Time (and hence clj-time) is that new releases support new changes to time zones.

Joda Time(以及clj-time)的一个好处是新版本支持对时区的新更改。

#5

If you dont need nothing more advanced, just use Java classes.

如果你不需要更高级的东西,只需使用Java类。

(.format (java.text.SimpleDateFormat. "MM/dd/yyyy") (new java.util.Date))

(.format(java.text.SimpleDateFormat。“MM / dd / yyyy”)(new java.util.Date))

#1