在 Kotlin 数据类中序列化 ZonedDateTime

Question

ZonedDateTime当我序列化数据类中的字段时，出现以下错误：

Type mismatch: inferred type is KClass<ZonedDateTimeSerializer> but KClass<out KSerializer<*>> was expected

这是我的课程：

import com.fasterxml.jackson.datatype.jsr310.ser.ZonedDateTimeSerializer
import kotlinx.serialization.Serializable
import java.time.ZonedDateTime

@Serializable
data class MyClass(
    @Serializable(ZonedDateTimeSerializer::class)
    val time: ZonedDateTime
)

如何ZonedDateTime在 Kotlin 中序列化 a？

Answer 1

这就是我所做的：

object KZonedDateTimeSerializer : KSerializer<ZonedDateTime> {
    override val descriptor: SerialDescriptor = PrimitiveSerialDescriptor("ZonedDateTime", PrimitiveKind.STRING)

    override fun serialize(encoder: Encoder, value: ZonedDateTime) {
        encoder.encodeString(value.toString())
    }

    override fun deserialize(decoder: Decoder): ZonedDateTime {
        val string = decoder.decodeString()
        return ZonedDateTime.parse(string)
    }
}

这是 OffsetDateTime。如果您不指定格式化程序，则分钟将被删除（如果它为零）：

object KOffsetDateTimeSerializer : KSerializer<OffsetDateTime> {
    override val descriptor: SerialDescriptor = PrimitiveSerialDescriptor("OffsetDateTime", PrimitiveKind.STRING)

    override fun serialize(encoder: Encoder, value: OffsetDateTime) {
        val format = DateTimeFormatter.ISO_OFFSET_DATE_TIME

        val string = format.format(value)
        encoder.encodeString(string)
    }

    override fun deserialize(decoder: Decoder): OffsetDateTime {
        val string = decoder.decodeString()
        return OffsetDateTime.parse(string)
    }
}