ISO 8601 Java时间间隔解析 [英] ISO 8601 Time Interval Parsing in Java

问题描述

ISO 8601 定义了表示时间间隔的语法。

ISO 8601 defines a syntax for representing a time interval.

有四种表达时间间隔的方法：

There are four ways to express a time interval:

• 开始和结束，例如2007-03-01T13：00：00Z / 2008-05-11T15：30：00Z


• 开始和持续时间，例如2007-03-01T13：00： 00Z / P1Y2M10DT2H30M


• 持续时间和结束，例如P1Y2M10DT2H30M / 2008-05-11T15：30：00Z


• 仅限持续时间，例如P1Y2M10DT2H30M，附加上下文信息

• Start and end, such as "2007-03-01T13:00:00Z/2008-05-11T15:30:00Z"
• Start and duration, such as "2007-03-01T13:00:00Z/P1Y2M10DT2H30M"
• Duration and end, such as "P1Y2M10DT2H30M/2008-05-11T15:30:00Z"
• Duration only, such as "P1Y2M10DT2H30M", with additional context information

如果结束值中缺少任何元素，则假定它们与起始值包括时区。该标准的这一特征允许简洁地表示时间间隔。例如，包括开始和结束时间在内的两小时会议的日期可以简单地显示为2007-12-14T13：30/15：30，其中/ 15:30表示/ 2007-12- 14T15：30（与开始时间相同），或每月结算期间的开始和结束日期为2008-02-15 / 03-14，其中/ 03-14表示/ 2008-03 -14（与开始相同的一年）。

If any elements are missing from the end value, they are assumed to be the same as for the start value including the time zone. This feature of the standard allows for concise representations of time intervals. For example, the date of a two-hour meeting including the start and finish times could be simply shown as "2007-12-14T13:30/15:30", where "/15:30" implies "/2007-12-14T15:30" (the same date as the start), or the beginning and end dates of a monthly billing period as "2008-02-15/03-14", where "/03-14" implies "/2008-03-14" (the same year as the start).

此外，通过在区间表达式的开头添加R [n] /来形成重复间隔，其中R用作字母本身，[n]由重复次数代替。省略[n]的值意味着无限次重复。因此，要从2008-03-01T13：00：00Z开始重复P1Y2M10DT2H30M的间隔五次，请使用R5 / 2008-03-01T13：00：00Z / P1Y2M10DT2H30M。

In addition, repeating intervals are formed by adding "R[n]/" to the beginning of an interval expression, where R is used as the letter itself and [n] is replaced by the number of repetitions. Leaving out the value for [n] means an unbounded number of repetitions. So, to repeat the interval of "P1Y2M10DT2H30M" five times starting at "2008-03-01T13:00:00Z", use "R5/2008-03-01T13:00:00Z/P1Y2M10DT2H30M".

我正在寻找一个好的Java解析器（如果可能与Joda-Time库兼容）来解析这个语法。指向一个好库的指针？

I am looking for a good Java parser (if possible compatible with the Joda-Time library) to parse this syntax. Any pointers to a good library ?

推荐答案

java.time

Java 8及更高版本中内置的 java.time 框架具有 持续时间。解析 方法，用于解析 ISO 8601格式的持续时间：

java.time.Duration d = java.time.Duration.parse("PT1H2M34S");
System.out.println("Duration in seconds: " + d.get(java.time.temporal.ChronoUnit.SECONDS));

打印持续时间（秒）：3754

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