解析ISO_INSTANT和类似的日期时间字符串 [英] Parsing ISO_INSTANT and similar Date Time Strings

问题描述

昨天我创建了这个精彩的静态方法，它工作得很好 - 昨天

I created this wonderful static method yesterday, and it worked just fine - yesterday

然而，今天它给了我这个错误。我猜它是Z之前的太多0。

However, today it gives me this error. I guess it is from too many 0s before the Z.

任何人都可以推荐如何以简洁的方式解析（Java 8）这种类型的字符串格式日期 - 请记住它昨天也有效，所以 ISO_INSTANT 也是 String <的有效格式/ code>？

Can anyone recommend how to parse in a concise way (Java 8) this type of String format date - keeping in mind that it worked yesterday too, so ISO_INSTANT is also a valid format for the String?

Caused by: java.time.DateTimeException: Unable to obtain LocalDate from TemporalAccessor: {NanoOfSecond=0, InstantSeconds=1443451604, MilliOfSecond=0, MicroOfSecond=0},ISO of type java.time.format.Parsed
at java.time.LocalDate.from(LocalDate.java:368)
at java.time.LocalDateTime.from(LocalDateTime.java:456)
... 9 more

在输入时间抛出异常：2015-09-28T14：46：44.000000Z

throwing an exception on input time: "2015-09-28T14:46:44.000000Z"

/**
 *
 * @param time the time in RFC3339 format (e.g. "2013-07-03T14:30:38Z" )
 * @return
 */
public static LocalDateTime parseTimeINSTANT(String time) {
    DateTimeFormatter f = DateTimeFormatter.ISO_INSTANT;
    return LocalDateTime.from(f.parse(time));
}

推荐答案

您正在解析与ISO即时一致的字符串，因此您需要将结果存储在 Instant 而不是 LocalDateTime ：

You are parsing a String that is consistent with an ISO instant so you need to store the result in a Instant instead of LocalDateTime:

public static Instant parseTimeINSTANT(String time) {
    DateTimeFormatter f = DateTimeFormatter.ISO_INSTANT;
    return Instant.from(f.parse(time)); // could be written f.parse(time, Instant::from);
}

请注意，此格式化程序正确处理小数秒，因此您无需删除他们。引用 DateTimeFormatter。 ISO_INSTANT Javadoc（强调我的）：

Note that this formatter handles correctly fractional seconds so you don't need to remove them. Quoting DateTimeFormatter.ISO_INSTANT Javadoc (emphasis mine):

解析时，至少到秒字段的时间是必须的。 从0到9的小数秒被解析。

至于为什么它在昨天而不是今天工作，我不知道......

As to why it worked yesterday and not today, I have no idea...

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