java - 如何将 "2021-11-20+01:00"格式的日期字符串解析为 ZonedDateTime - 错误

Question

如何将“2021-11-20+01:00”格式的日期解析为ZonedDateTime ？我正在尝试:

String value = "2021-11-20+01:00";
ZonedDateTime zDate = ZonedDateTime.parse(value, DateTimeFormatter.ofPattern("yyyy-MM-ddxxx"));

但是出现这个奇怪的错误:

java.time.format.DateTimeParseException: Text '2021-11-20+01:00' could not be parsed: Unable to obtain ZonedDateTime from TemporalAccessor: {OffsetSeconds=3600},ISO resolved to 2021-11-20 of type java.time.format.Parsed

...Unsupported field: InstantSeconds...

有什么建议吗？ European VIES VAT ID checking system 使用此时间格式接收 XML (SOAP) 响应时:<requestDate>2021-11-20+01:00</requestDate> 。与OffsetDateTime同样的错误..

有趣的是，Javadoc 说“三个字母 (x) 输出小时和分钟，带有冒号，例如 '+01:30'”。那么为什么上面的模式不起作用呢？

也尝试过这个 - 同样的错误:

ZonedDateTime zDate = ZonedDateTime.parse(value, DateTimeFormatter.ISO_OFFSET_DATE);

完整的错误日志:

Exception in thread "main" java.time.format.DateTimeParseException: Text '2021-11-20 +01:00' could not be parsed: Unable to obtain OffsetDateTime from TemporalAccessor: {OffsetSeconds=3600},ISO resolved to 2021-11-20 of type java.time.format.Parsed
    at java.base/java.time.format.DateTimeFormatter.createError(DateTimeFormatter.java:2017)
    at java.base/java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1952)
    at java.base/java.time.OffsetDateTime.parse(OffsetDateTime.java:402)
    at javaapplication5.JavaApplication5.checkVATatVIES(JavaApplication5.java:162)
    at javaapplication5.JavaApplication5.main(JavaApplication5.java:65)
Caused by: java.time.DateTimeException: Unable to obtain OffsetDateTime from TemporalAccessor: {OffsetSeconds=3600},ISO resolved to 2021-11-20 of type java.time.format.Parsed
    at java.base/java.time.OffsetDateTime.from(OffsetDateTime.java:370)
    at java.base/java.time.format.Parsed.query(Parsed.java:235)
    at java.base/java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1948)
    ... 3 more
Caused by: java.time.DateTimeException: Unable to obtain Instant from TemporalAccessor: {OffsetSeconds=3600},ISO resolved to 2021-11-20 of type java.time.format.Parsed
    at java.base/java.time.Instant.from(Instant.java:378)
    at java.base/java.time.OffsetDateTime.from(OffsetDateTime.java:365)
    ... 5 more
Caused by: java.time.temporal.UnsupportedTemporalTypeException: Unsupported field: InstantSeconds
    at java.base/java.time.format.Parsed.getLong(Parsed.java:203)
    at java.base/java.time.Instant.from(Instant.java:373)
    ... 6 more

使用 OpenJDK 11。

Answer 1

不存在仅由日期和时区组成的 Java 类型。正如其名称所暗示的，ZonedDateTime 和 OffsetDateTime 包含日期和时间。因此，您需要创建一个格式化程序来假定一天中的默认时间:

String value = "2021-11-20+01:00";

DateTimeFormatterBuilder builder = new DateTimeFormatterBuilder();
builder.appendPattern("yyyy-MM-ddxxx");
builder.parseDefaulting(ChronoField.HOUR_OF_DAY, 0);
DateTimeFormatter formatter = builder.toFormatter();

ZonedDateTime zDate = ZonedDateTime.parse(value, formatter);

当然，一天中的小时可以是您选择的任何值:例如，12 代表中午。但它必须是有效的。