xsd：dateTime到Java OffsetDateTime [英] xsd:dateTime to Java OffsetDateTime

问题描述

为了使用JAXB正确处理 xs：dateTime ，我必须从 String - > java.time.OffsetDateTime 。

In order to properly handle an xs:dateTime with JAXB, I have to write my own converter from String->java.time.OffsetDateTime.

如上所述在XML Schema Definition中，dateTime的灵感来自ISO 8601.我使用 OffsetDateTime.parse（s，DateTimeFormatter.ISO_OFFSET_DATE_TIME）来解析 xs：dateTime ，适用于例如

As mentioned in the XML Schema Definition, dateTime was inspired by ISO 8601. I used OffsetDateTime.parse(s, DateTimeFormatter.ISO_OFFSET_DATE_TIME) to parse the xs:dateTime, which works fine for e.g.

"2007-12-03T10:15:30+01:00" //or
"2007-12-03T10:15:30Z"

遗憾的是，在 xs：dateTime 偏移部分被宣布为可选，所以解析有效的

Sadly, in xs:dateTime the offset part is declared optional, so parsing the valid

"2016-03-02T17:09:55"

抛出 DateTimeParseException 。

是否有 DateTimeFormatter ，它还处理未分区的 xs：dateTime s（可能带有默认时区）？

Is there a DateTimeFormatter for OffsetDateTime, which also handles unzoned xs:dateTimes (probably with a default timezone)?

推荐答案

我认为没有内置的，但你可以在 DateTimeFormatterBuilder class。

I don't think there's a built-in one but you can make your own with the help of the DateTimeFormatterBuilder class.

您可以指定方括号括起来的可选偏移量，即 [XXXXX] （匹配+ HH：MM：ss），然后，您可以提供默认偏移量（ parseDefaulting ）如果不存在。如果要默认为UTC，可以设置0以指定无偏移量;如果你想默认使用VM的当前偏移量，可以使用 OffsetDateTime.now（）。getLong（ChronoField.OFFSET_SECONDS）。

You can specify an optional offset enclosed in squared brackets, i.e. [XXXXX] (to match "+HH:MM:ss"), Then, you can provide a default offset (parseDefaulting) in the case where it is not present. If you want to default to UTC, you can set 0 to specify no offset; and if you want to default to the current offset of the VM, you can get it with OffsetDateTime.now().getLong(ChronoField.OFFSET_SECONDS).

public static void main(String[] args) {
    String[] dates = {
        "2007-12-03T10:15:30+01:00",
        "2007-12-03T10:15:30Z",
        "2016-03-02T17:09:55",
        "2016-03-02T17:09:55Z"
    };
    DateTimeFormatter formatter =
        new DateTimeFormatterBuilder().appendPattern("yyyy-MM-dd'T'HH:mm:ss[XXXXX]")
                                      .parseDefaulting(ChronoField.OFFSET_SECONDS, 0)
                                      // or OffsetDateTime.now().getLong(ChronoField.OFFSET_SECONDS)
                                      .toFormatter();
    for (String date : dates) {
        System.out.println(OffsetDateTime.parse(date, formatter));
    }
}

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