Question

需要从格式2016-06-24T13:39:44.687680解析日期时间。

第一步使用，尝试用行解析没有微秒的时间。

System.out.println(OffsetDateTime.parse("2011-12-03T10:15:30", DateTimeFormatter.ISO_LOCAL_DATE_TIME));

有例外

Exception in thread "main" java.time.format.DateTimeParseException: Text '2011-12-03T10:15:30' could not be parsed: Unable to obtain OffsetDateTime from TemporalAccessor: {},ISO resolved to 2011-12-03T10:15:30 of type java.time.format.Parsed
    at java.time.format.DateTimeFormatter.createError(DateTimeFormatter.java:1920)
    at java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1855)
    at java.time.OffsetDateTime.parse(OffsetDateTime.java:402)
    at timeread.TimeReading.main(TimeReading.java:18)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
Caused by: java.time.DateTimeException: Unable to obtain OffsetDateTime from TemporalAccessor: {},ISO resolved to 2011-12-03T10:15:30 of type java.time.format.Parsed
    at java.time.OffsetDateTime.from(OffsetDateTime.java:370)
    at java.time.format.Parsed.query(Parsed.java:226)
    at java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1851)
    ... 7 more
Caused by: java.time.DateTimeException: Unable to obtain ZoneOffset from TemporalAccessor: {},ISO resolved to 2011-12-03T10:15:30 of type java.time.format.Parsed
    at java.time.ZoneOffset.from(ZoneOffset.java:348)
    at java.time.OffsetDateTime.from(OffsetDateTime.java:359)
    ... 9 more

尝试将DateTimeFormatter与TimeZone

一起使用

System.out.println(OffsetDateTime.parse("2011-12-03T10:15:30", DateTimeFormatter.ISO_LOCAL_DATE_TIME.withZone(ZoneId.systemDefault())));

类似的例外

Exception in thread "main" java.time.format.DateTimeParseException: Text '2011-12-03T10:15:30' could not be parsed: Unable to obtain OffsetDateTime from TemporalAccessor: {InstantSeconds=1322892930},ISO,Europe/Moscow resolved to 2011-12-03T10:15:30 of type java.time.format.Parsed
    at java.time.format.DateTimeFormatter.createError(DateTimeFormatter.java:1920)
    at java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1855)
    at java.time.OffsetDateTime.parse(OffsetDateTime.java:402)
    at timeread.TimeReading.main(TimeReading.java:18)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
Caused by: java.time.DateTimeException: Unable to obtain OffsetDateTime from TemporalAccessor: {InstantSeconds=1322892930},ISO,Europe/Moscow resolved to 2011-12-03T10:15:30 of type java.time.format.Parsed
    at java.time.OffsetDateTime.from(OffsetDateTime.java:370)
    at java.time.format.Parsed.query(Parsed.java:226)
    at java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1851)
    ... 7 more
Caused by: java.time.DateTimeException: Unable to obtain ZoneOffset from TemporalAccessor: {InstantSeconds=1322892930},ISO,Europe/Moscow resolved to 2011-12-03T10:15:30 of type java.time.format.Parsed
    at java.time.ZoneOffset.from(ZoneOffset.java:348)
    at java.time.OffsetDateTime.from(OffsetDateTime.java:359)
    ... 9 more

Answer 1

OffsetDateTime表示日期时间偏移。要创建OffsetDateTime，您需要一个区域偏移量。

ISO-8601日历中与UTC / Greenwich偏移的日期时间系统，如2007-12-03T10：15：30 + 01:00。

请参阅：https://docs.oracle.com/javase/8/docs/api/java/time/OffsetDateTime.html

例如：

OffsetDateTime.parse("2011-12-03T10:15:30+01:00", DateTimeFormatter.ISO_OFFSET_DATE_TIME);

如果您尝试使用ZoneId解析日期时间，则应使用ZonedDateTime。

ISO-8601日历系统中带有时区的日期时间，例如 2007-12-03T10：15：30 + 01:00欧洲/巴黎。

请参阅：https://docs.oracle.com/javase/8/docs/api/java/time/ZonedDateTime.html

例如：

ZonedDateTime.parse("2011-12-03T10:15:30", DateTimeFormatter.ISO_LOCAL_DATE_TIME.withZone(ZoneId.systemDefault()));

如果您需要的是ISO-8601日历系统中没有时区的日期时间，则可以使用LocalDateTime。

ISO-8601日历系统中没有时区的日期时间，例如如2007-12-03T10：15：30。

请参阅：https://docs.oracle.com/javase/8/docs/api/java/time/LocalDateTime.html

例如：

LocalDateTime.parse("2016-06-24T13:39:44.687680", DateTimeFormatter.ISO_LOCAL_DATE_TIME);

Answer 2

OffsetDateTime.parse需要一个包含偏移量（+/-hh:mm）的字符串，"2011-12-03T10:15:30"没有。使用LocalDateTime.parse解析它并使用OffsetDateTime.of转换结果。

Answer 3

我有一个稍微不标准的 ISO(!) 日期来解析 2021-01-14T09:25:33+0000

标准的 DateTimeFormatter.ISO_OFFSET_DATE_TIME 不会处理它，但 DateTimeFormatterBuilder 可用于创建一个。

DateTimeFormatter customFormatter = new DateTimeFormatterBuilder()
   .append(DateTimeFormatter.ISO_LOCAL_DATE_TIME)
   .appendOffset("+HHMM","Z")
   .toFormatter();

重要的一点是 .appendOffset() 方法，因为使用 .ofPattern() 似乎不适用于偏移解析。

OffsetDateTime解析

3 个答案: