升级Java 17与SpringBoot后JAXB反序列化失效，如何适配新库？

升级到Java 17并将JAXB库从com.sun.xml.bind/jaxb-impl/2.2.11-xsd-doc-0.2.0替换为org.glassfish.jaxb/jaxb-runtime/2.3.7后，原XML反序列化逻辑出现异常：解析后的Response对象中data字段为null，而旧版本能正常解析出Data(row=[Row(error=0)])。

原代码与输入XML #

Kotlin实体类与反序列化方法

import java.io.StringReader
import javax.xml.bind.JAXBContext
import javax.xml.bind.Unmarshaller
import javax.xml.bind.annotation.*

val jaxbContext: JAXBContext = JAXBContext.newInstance(Response::class.java)
val jaxbUnmarshaller: Unmarshaller = jaxbContext.createUnmarshaller()

@XmlRootElement(name = "xml")
@XmlAccessorType(XmlAccessType.FIELD)
data class Response(@XmlElement(name = "data", namespace = "rs") val data: Data? = null)
data class Data(@field:XmlElement(name = "Row") val row: MutableList<Row>? = null)
data class Row(@XmlAttribute val error: String? = null)

fun umarshallAsSimpleResponse(xmlString: String): Response {
    val reader = StringReader(xmlString)
    return jaxbUnmarshaller.unmarshal(reader) as Response
}

输入XML

<xml xmlns:s='uuid:BDC6E3FO-6DA3-1ldl-A2A3-00AA00C14882' 
     xmlns:dt='uuid:C2F41010-6583-1ldl-429F-OOAAOOC14882'
     xmlns:rs='urn:schemas-microsoft-com:rowset' 
     xmlns:z='#Rowsetschema'>
    <rs:data>
        <Row error="0" Usl=" " Data=" " Przedz=" " Cena=" " Ilosc="0" Konto=" "
             errorMessage="Status został zmieniony."></Row>
    </rs:data>
</xml>

解决方案 #

问题根源在于新旧JAXB实现对命名空间的处理严格程度不同：旧版Sun JAXB允许使用命名空间前缀（如rs）代替完整URI，而GlassFish JAXB严格遵循规范，要求使用实际的命名空间URI。

需要做两处修改：

1. 修正Response类中data字段的命名空间为完整URI
   将@XmlElement的namespace值从前缀rs替换为XML中定义的完整命名空间urn:schemas-microsoft-com:rowset。

2. 为Data类添加@XmlAccessorType注解
   保持与Response类一致的属性访问策略，避免Kotlin data类的属性访问逻辑被JAXB误解。

修改后的代码 #

import java.io.StringReader
import javax.xml.bind.JAXBContext
import javax.xml.bind.Unmarshaller
import javax.xml.bind.annotation.*

val jaxbContext: JAXBContext = JAXBContext.newInstance(Response::class.java)
val jaxbUnmarshaller: Unmarshaller = jaxbContext.createUnmarshaller()

@XmlRootElement(name = "xml")
@XmlAccessorType(XmlAccessType.FIELD)
data class Response(
    @XmlElement(name = "data", namespace = "urn:schemas-microsoft-com:rowset") 
    val data: Data? = null
)

@XmlAccessorType(XmlAccessType.FIELD)
data class Data(@field:XmlElement(name = "Row") val row: MutableList<Row>? = null)

data class Row(@XmlAttribute val error: String? = null)

fun umarshallAsSimpleResponse(xmlString: String): Response {
    val reader = StringReader(xmlString)
    return jaxbUnmarshaller.unmarshal(reader) as Response
}

验证结果 #

修改后重新解析XML，将得到与旧版本一致的结果：

Response(data=Data(row=[Row(error=0)]))

内容的提问来源于stack exchange，提问作者tryingHard