在 Kotlin 数据中序列化 ZonedDateTime class

Question

当我序列化数据 class 中的 ZonedDateTime 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 class:

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
)

如何在 Kotlin 中序列化 ZonedDateTime？

Answer 1

这是我所做的：

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)
    }
}

这里是 OffsetDateTime。如果您不指定格式化程序，则分钟为零时将被删除：

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)
    }
}

在 Kotlin 数据中序列化 ZonedDateTime class

Serialize ZonedDateTime in Kotlin data class

datetime

jackson

kotlin