杰克逊升级后无法识别奇怪的属性名称答案

【问题标题】：Jackson does not recognize weird property names after upgrade杰克逊升级后无法识别奇怪的属性名称
【发布时间】：2021-08-14 10:57:41
【问题描述】：

升级到 Jackson 2.12.3 后，奇怪的 Kotlin 属性似乎不再受支持：

Caused by: java.lang.IllegalArgumentException:
Conflicting getter definitions for property "fSRI": com.example.ModelRow#getFSRI-SECTION() vs com.example.ModelRow#getFSRI-ID()

完整的测试用例：

import com.fasterxml.jackson.databind.DeserializationFeature
import com.fasterxml.jackson.databind.MapperFeature
import com.fasterxml.jackson.databind.ObjectMapper
import com.fasterxml.jackson.datatype.jdk8.Jdk8Module
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule
import com.fasterxml.jackson.module.kotlin.KotlinModule
import com.fasterxml.jackson.module.kotlin.convertValue
import org.junit.jupiter.api.Test

class JacksonTest {

    @Test
    fun doTest() {
        val map = mapOf( "FSRI-SECTION" to "1", "FSRI-ID" to "1234")
        objectMapper().convertValue<MyModel>(map)
    }

    data class MyModel(
        val `FSRI-ID`: String?,
        val `FSRI-SECTION`: Int?
    )

    private fun objectMapper(): ObjectMapper {
        return ObjectMapper()
            .registerModule(KotlinModule(nullToEmptyCollection = true, nullIsSameAsDefault = true))
            .registerModule(JavaTimeModule())
            .registerModule(Jdk8Module())
            .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
            .configure(MapperFeature.DEFAULT_VIEW_INCLUSION, false)
    }

}

它在 2.11.3 中运行良好。

【问题讨论】：

标签： kotlin jackson jackson-databind

【解决方案1】：

您需要启用字段匹配，而不是 getters。你可以为ObjectMapper定义这个：

private fun objectMapper(): ObjectMapper {
    val mapper = ObjectMapper()
        .registerModule(KotlinModule(nullToEmptyCollection = true, nullIsSameAsDefault = true))
        .registerModule(JavaTimeModule())
        .registerModule(Jdk8Module())
        .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
        .configure(MapperFeature.DEFAULT_VIEW_INCLUSION, false)

    return mapper.setVisibility(mapper.visibilityChecker
        .withGetterVisibility(JsonAutoDetect.Visibility.NONE)
        .withFieldVisibility(JsonAutoDetect.Visibility.ANY))
}

或者只注释给定的类：

@JsonAutoDetect(getterVisibility = NONE, fieldVisibility = ANY)
data class MyModel(

在这两种情况下它都应该工作并打印：

MyModel(FSRI-ID=1234, FSRI-SECTION=1)

另见：

【讨论】：