That timestamp you have (2019-05-08T07:45:44.519Z) is an ISO-8601 instant.
If you .register(JavaTimeModule()) (which is provided by
jackson-modules-java8 <https://github.com/FasterXML/jackson-modules-java8>)
in your ObjectMapper it will be able to deserialize that into a
java.time.Instant without any other configuration. Thereafter, you can
convert that into the timezone you
Example in Kotlin:
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule
import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
import com.fasterxml.jackson.module.kotlin.readValue
import java.time.Instant
fun main() {
data class TimeHolder(val time: Instant)
val objectMapper = jacksonObjectMapper()
.registerModule(JavaTimeModule())
val thing = objectMapper.readValue<TimeHolder>("""{"time" :
"2019-05-08T07:45:44.519Z"}""")
println(thing) // TimeHolder(time=2019-05-08T07:45:44.519Z)
println(thing.time.atZone(ZoneId.of("Asia/Brunei"))) //
2019-05-08T15:45:44.519+08:00[Asia/Brunei]
}
-Drew
On Thursday, January 21, 2021 at 11:42:45 PM UTC-5 [email protected] wrote:
> Hello:
>
> How can I use annotations to deserialize Greenwich Time into LocalTime?
> Here is Demo class:
> public class Demo implements Serializable { private LocalDateTime time; //
> setter getter ... }
>
> Here is Demo JSON:
> {"time" : "2019-05-08T07:45:44.519Z"}
>
> The time I expect to get is 2019-05-08T15:45:44.519, but what I get is:
> 2019-05-08T07:45:44.519
>
> Now I'm using custom deserialized classes to solve the problem:
> public class LocalDateTimeDeserializer extends
> JsonDeserializer<LocalDateTime> { private static final String ZULU = "Z";
> @Override public LocalDateTime deserialize(JsonParser jsonParser,
> DeserializationContext deserializationContext) throws IOException,
> JsonProcessingException { String text = jsonParser.getText(); if
> (text.endsWith(ZULU)) { return LocalDateTime.ofInstant(Instant.parse(text),
> ZoneId.systemDefault()); } else { return LocalDateTime.parse(text,
> DateTimeFormatter.ISO_LOCAL_DATE_TIME); } } } public class Demo implements
> Serializable { @JsonDeserialize(using =
> CustomLocalDateTimeDeserializer.class) private LocalDateTime time; //
> setter getter ... }
>
> Is there any other way?
> I would appreciate your help.
>
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