如何将LocalDateTime对象转换为包括时区的ISO字符串? [英] How to convert LocalDateTime object into ISO string including time zone?

问题描述

我正在尝试将日期/时间字符串来回转换为LocalDateTime对象.我正在使用 ThreeTenBp 作为日期/时间库.

I am trying to convert a date/time string back and forth into a LocalDateTime object. I am using ThreeTenBp as the date/time library.

val actual = LocalDateTime.parse("2016-12-27T08:15:05.674+01:00", 
                                 DateTimeFormatter.ISO_DATE_TIME)
val expected = LocalDateTime.of(2016, 12, 27, 8, 15, 5, 674000000)
assertThat(actual).isEqualTo(expected) // Successful

LocalDateTime->字符串

val dateTime = LocalDateTime.of(2016, 12, 27, 8, 15, 5, 674000000)
val actual  = dateTime.format(DateTimeFormatter.ISO_DATE_TIME)
assertThat(actual).isEqualTo("2016-12-27T08:15:05.674+01:00") // Fails

由于某些原因缺少时区:

For some reason the time zone is missing:

预期:< ... 6-12-27T08:15:05.674 [+01:00]>但是:< ... 6-12-27T08:15:05.674 []">
预期:"2016-12-27T08:15:05.674 + 01:00"
实际:"2016-12-27T08:15:05.674"

expected: <...6-12-27T08:15:05.674[+01:00]"> but was:<...6-12-27T08:15:05.674[]">
Expected :"2016-12-27T08:15:05.674+01:00"
Actual :"2016-12-27T08:15:05.674"

推荐答案

LocalDateTime是与偏移量/时区无关的类.您需要一个OffsetDateTime类.

LocalDateTime is offset/timezone agnostic class. You need an OffsetDateTime class.

字符串-> OffsetDateTime

String -> OffsetDateTime

val actual = OffsetDateTime.parse("2016-12-27T08:15:05.674+01:00", DateTimeFormatter.ISO_DATE_TIME)
val expected = OffsetDateTime.of(2016, 12, 27, 8, 15, 5, 674000000, ZoneOffset.of("+01:00"))
assertThat(actual).isEqualTo(expected)

OffsetDateTime->字符串

OffsetDateTime -> String

val dateTime = OffsetDateTime.of(2016, 12, 27, 8, 15, 5, 674000000, ZoneOffset.of("+01:00"))
val actual  = dateTime.format(DateTimeFormatter.ISO_DATE_TIME)
assertThat(actual).isEqualTo("2016-12-27T08:15:05.674+01:00")

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