我们的Rest API被多个外部方使用。他们都使用" ISO-ish"格式,但时区偏移的格式略有不同。这些是我们看到的一些最常见的格式:
2018-01-01T15:56:31.410Z
2018-01-01T15:56:31.41Z
2018-01-01T15:56:31Z
2018-01-01T15:56:31+00:00
2018-01-01T15:56:31+0000
2018-01-01T15:56:31+00
在我的控制器中,我使用以下注释:
@RequestMapping(value = ["/some/api/call"], method = [GET])
fun someApiCall(
@RequestParam("from")
@DateTimeFormat(iso = ISO.DATE_TIME)
from: OffsetDateTime
) {
...
}
它解析变量1-4很好,但是对于变体5和6产生了400 Bad Request错误,但有以下异常:
Caused by: java.time.format.DateTimeParseException: Text '2018-01-01T13:37:00.001+00' could not be parsed, unparsed text found at index 23
at java.time.format.DateTimeFormatter.parseResolved0(DateTimeFormatter.java:1952)
at java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1851)
如何让它接受所有上述ISO格式变体(即使它们不是100%符合ISO标准)?
答案 0 :(得分:1)
您获得400-Bad Request
,因为格式5和6不属于ISO
规范。
如果你看一下时区指示符,它可以是Z
或+hh:mm
或-hh:mm
中的一个。
ISO-8601
格式的官方列表可以在 here 找到。
Year:
YYYY (eg 1997)
Year and month:
YYYY-MM (eg 1997-07)
Complete date:
YYYY-MM-DD (eg 1997-07-16)
Complete date plus hours and minutes:
YYYY-MM-DDThh:mmTZD (eg 1997-07-16T19:20+01:00)
Complete date plus hours, minutes and seconds:
YYYY-MM-DDThh:mm:ssTZD (eg 1997-07-16T19:20:30+01:00)
Complete date plus hours, minutes, seconds and a decimal fraction of a second
YYYY-MM-DDThh:mm:ss.sTZD (eg 1997-07-16T19:20:30.45+01:00)
其中:
YYYY = four-digit year
MM = two-digit month (01=January, etc.)
DD = two-digit day of month (01 through 31)
hh = two digits of hour (00 through 23) (am/pm NOT allowed)
mm = two digits of minute (00 through 59)
ss = two digits of second (00 through 59)
s = one or more digits representing a decimal fraction of a second
TZD = time zone designator (Z or +hh:mm or -hh:mm)
答案 1 :(得分:1)
我通过添加自定义格式化程序注释来解决它:
@Target(AnnotationTarget.VALUE_PARAMETER)
@Retention(AnnotationRetention.RUNTIME)
annotation class IsoDateTime
加上FormatterFactory:
class DefensiveDateTimeFormatterFactory :
EmbeddedValueResolutionSupport(), AnnotationFormatterFactory<IsoDateTime>
{
override fun getParser(annotation: IsoDateTime?, fieldType: Class<*>?): Parser<*> {
return Parser<OffsetDateTime> { text, _ -> OffsetDateTime.parse(text, JacksonConfig.defensiveFormatter) }
}
override fun getPrinter(annotation: IsoDateTime, fieldType: Class<*>): Printer<*> {
return Printer<OffsetDateTime> { obj, _ -> obj.format(DateTimeFormatter.ISO_DATE_TIME) }
}
override fun getFieldTypes(): MutableSet<Class<*>> {
return mutableSetOf(OffsetDateTime::class.java)
}
}
实际的DateTimeFormat类来自我的另一个问题,How to parse different ISO date/time formats with Jackson and java.time?
使用WebMvcConfigurer将其添加到Spring:
@Configuration
open class WebMvcConfiguration : WebMvcConfigurer {
override fun addFormatters(registry: FormatterRegistry) {
registry.addFormatterForFieldAnnotation(DefensiveDateTimeFormatterFactory())
}
}