Kotlin数据类和LocalDateTime

Question

data class Ticket(
        var contact_email : String? = null,
        var date_opened : LocalDateTime? = null
)

data class Ticket(
        var contact_email : String? = null,

        @JsonSerialize(using = ToStringSerializer::class)
        @JsonDeserialize(using = LocalDateTimeDeserializer::class)
        var date_opened : LocalDateTime? = null
)

怎么修？

Answer 1

你的问题更多的是关于杰克逊而不是科特林。正如Serialize/Deserialize java 8 java.time与Jackson JSON映射器中所述

您需要添加一个额外的gradle依赖项来解决它

implementation("com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.9.5")

之后它应该会起作用

import com.fasterxml.jackson.databind.ObjectMapper
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule
import org.testng.annotations.Test
import java.time.LocalDateTime

class SoTest {

    data class Ticket(
            var contact_email: String? = null,
            var date_opened: LocalDateTime? = null
    )

    @Test
    fun checkSerialize() {
        val mapper = ObjectMapper()
        mapper.registerModule(JavaTimeModule())
        val ticket = mapper.readValue(inputJsonString, Ticket::class.java)
        assert ("$ticket"=="Ticket(contact_email=[e-mail], date_opened=2017-11-13T06:40)")
    }

    val inputJsonString = """{
        "contact_email": "[e-mail]",
        "date_opened": "2017-11-13T06:40:00Z"
    }""".trimIndent()

}