需要在XML - Spring批处理中访问多个@XmlRootElement

@XmlRootElement
public class ClassA {
    // 类A的属性和方法
}

@XmlRootElement
public class ClassB {
    // 类B的属性和方法
}

<bean id="marshaller" class="org.springframework.oxm.jaxb.Jaxb2Marshaller">
    <property name="classesToBeBound">
        <list>
            <value>com.example.ClassA</value>
            <value>com.example.ClassB</value>
        </list>
    </property>
</bean>

@Bean
public ItemReader<ClassA> classAReader() {
    StaxEventItemReader<ClassA> reader = new StaxEventItemReader<>();
    reader.setResource(new ClassPathResource("data.xml"));
    reader.setFragmentRootElementName("classA");
    reader.setUnmarshaller(marshaller);
    return reader;
}

@Bean
public ItemReader<ClassB> classBReader() {
    StaxEventItemReader<ClassB> reader = new StaxEventItemReader<>();
    reader.setResource(new ClassPathResource("data.xml"));
    reader.setFragmentRootElementName("classB");
    reader.setUnmarshaller(marshaller);
    return reader;
}

@Bean
public ItemWriter<ClassA> classAWriter() {
    // 类A的写入逻辑
}

@Bean
public ItemWriter<ClassB> classBWriter() {
    // 类B的写入逻辑
}