我正在编写一个批处理作业来解析 XML、提取字段并将它们保存在数据库中。解析 XML 时，它选取 2 个根元素，但将所有字段保留为空，因此在我的数据库中我有 2 个记录将为空字段。似乎无法弄清楚为什么它无法读取元素...TIA

  @Bean
    fun xmlFileItemReader(environment: Environment): ItemReader<ConsumerInfo> {
        val xmlFileReader = StaxEventItemReader<ConsumerInfo>()
        xmlFileReader.setResource(ClassPathResource(environment.getRequiredProperty(PROPERTY_XML_SOURCE_FILE_PATH)))
        xmlFileReader.setFragmentRootElementName("ConsumerInfo")

        val customerMarshaller = Jaxb2Marshaller()
        customerMarshaller.setClassesToBeBound(ConsumerInfo::class.java)
        xmlFileReader.setUnmarshaller(customerMarshaller)


        return xmlFileReader
    }

Kotlin 数据类

@XmlRootElement(name = "ConsumerInfo", namespace = *Its correct*)
@XmlAccessorType(XmlAccessType.FIELD)
data class ConsumerInfo(


        @XmlElement(name = "LastName")
        var lastName: String? = null,
        @XmlElement(name = "FirstName")
        var firstName: String? = null,
        @XmlElement(name = "GenerationCode")
        var generationCode: String? = null,
        @XmlElement(name = "Street")
        var street: String? = null,
        @XmlElement(name = "City")
        var city: String? = null,
        @XmlElement(name = "State")
)

XML

  <ConsumerInfo>
        <LastName>lastn</LastName>
        <FirstName>firstn</FirstName>
        <GenerationCode>g</GenerationCode>
        <Street>strt</Street>
        <City>cty</City>
        <State>st</State>
    </ConsumerInfo>
    <ConsumerInfo>
        <LastName>last</LastName>
        <FirstName>first</FirstName>
        <GenerationCode>gc</GenerationCode>
        <Street>street</Street>
        <City>city</City>
        <State>state</State>
    </ConsumerInfo>

    compile('org.springframework.boot:spring-boot-starter-batch')
    compile('org.springframework.boot:spring-boot-starter-jdbc')
    compile('com.fasterxml.jackson.module:jackson-module-kotlin')
    // https://mvnrepository.com/artifact/org.springframework/spring-oxm
    compile group: 'org.springframework', name: 'spring-oxm', version: '5.1.6.RELEASE'
    compile("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
    compile("org.jetbrains.kotlin:kotlin-reflect")
    compile ('org.postgresql:postgresql')
    testCompile('org.springframework.boot:spring-boot-starter-test')
}

最佳答案

更新:

当使用 Kotlin 数据类时，@XmlElement(name = "*****") 似乎没有将读取器/编码器映射到该字段，而是使用 val 名称来尝试映射。如果你想在 Kotlin 中使用 @XmlELEment，你需要显式地创建你的 getters。

Kotlin 解决方案:

@XmlRootElement(name = "ConsumerInfo")
class DemoCustomer {


    @get:XmlElement(name = "FirstName")
    var firstName: String? = null

    @get:XmlElement(name = "LastName")
    var lastName: String? = null
}

Java 解决方案:

@XmlRootElement(name = "ConsumerInfo")
public class DemoCustomer {


    private String firstName;

    private String lastName;


    @XmlElement(name= "FirstName")
    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    @XmlElement(name = "LastName")
    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

关于java - JaxB2Marshaller 不将 XML 绑定(bind)到 Kotlin 数据类，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/55976829/