您可以使用如何在XSD中为基类型生成@XmlRootElement类中的绑定来修复此问题。

下面是Maven的一个示例

        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>jaxb2-maven-plugin</artifactId>
            <version>1.3.1</version>
            <executions>
                <execution>
                    <id>xjc</id>
                    <goals>
                        <goal>xjc</goal>
                    </goals>
                </execution>
            </executions>
            <configuration>
                <schemaDirectory>src/main/resources/xsd</schemaDirectory>
                <packageName>com.mycompany.schemas</packageName>
                <bindingFiles>bindings.xjb</bindingFiles>
                <extension>true</extension>
            </configuration>
        </plugin>

这是装订。XJB文件内容

<?xml version="1.0"?>
<jxb:bindings version="1.0" xmlns:jxb="http://java.sun.com/xml/ns/jaxb"
              xmlns:xjc= "http://java.sun.com/xml/ns/jaxb/xjc"
              jxb:extensionBindingPrefixes="xjc" xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <jxb:bindings schemaLocation="path/to/myschema.xsd" node="/xs:schema">
        <jxb:globalBindings>
            <xjc:simple/>
        </jxb:globalBindings>
    </jxb:bindings>
</jxb:bindings>

JAXBElement包装器适用于JAXB没有生成@XmlRootElement的情况。这些包装器在maven-jaxb2-plugin生成的ObjectFactory类中可用。如:

     public class HelloWorldEndpoint {
        @PayloadRoot(namespace = NAMESPACE_URI, localPart = "person")
        @ResponsePayload
        public JAXBElement<Greeting> sayHello(@RequestPayload JAXBElement<Person> request) {

        Person person = request.getValue();

        String greeting = "Hello " + person.getFirstName() + " " + person.getLastName() + "!";

        Greeting greet = new Greeting();
        greet.setGreeting(greeting);

        ObjectFactory factory = new ObjectFactory();
        JAXBElement<Greeting> response = factory.createGreeting(greet);
        return response;
      }
 }

为了解决这个问题，你应该在使用wsimport编译之前配置一个xml绑定，将generateElementProperty设置为false。

     <jaxws:bindings wsdlLocation="LOCATION_OF_WSDL"
      xmlns:jaxws="http://java.sun.com/xml/ns/jaxws"
      xmlns:xjc="http://java.sun.com/xml/ns/jaxb/xjc" 
      xmlns:xs="http://www.w3.org/2001/XMLSchema"
      xmlns:jxb="http://java.sun.com/xml/ns/jaxb"
      xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/">
         <jaxws:enableWrapperStyle>false</jaxws:enableWrapperStyle>
    <jaxws:bindings  node="wsdl:definitions/wsdl:types/xs:schema[@targetNamespace='NAMESPACE_OF_WSDL']">
      <jxb:globalBindings xmlns:jxb="http://java.sun.com/xml/ns/jaxb" xmlns:xs="http://www.w3.org/2001/XMLSchema">
            <xjc:generateElementProperty>false</xjc:generateElementProperty> 
      </jxb:globalBindings>
  </jaxws:bindings>
</jaxws:bindings>

如您所知，答案是使用ObjectFactory()。下面是一个为我工作的代码示例:)

ObjectFactory myRootFactory = new ObjectFactory();

MyRootType myRootType = myRootFactory.createMyRootType();

try {

        File file = new File("./file.xml");
        JAXBContext jaxbContext = JAXBContext.newInstance(MyRoot.class);
        Marshaller jaxbMarshaller = jaxbContext.createMarshaller();

        //output pretty printed
        jaxbMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

        JABXElement<MyRootType> myRootElement = myRootFactory.createMyRoot(myRootType);

        jaxbMarshaller.marshal(myRootElement, file);
        jaxbMarshaller.marshal(myRootElement, System.out);

    } catch (JAXBException e) {
        e.printStackTrace();
    }

这对我们也没用。但我们确实找到了一篇被广泛引用的文章，增加了一些背景……我将在这里链接到它，以方便下一个人:http://weblogs.java.net/blog/kohsuke/archive/2006/03/why_does_jaxb_p.html

@XmlRootElement不需要解组-如果使用2参数形式的Unmarshaller#unmarshall。

所以，如果不这样做:

UserType user = (UserType) unmarshaller.unmarshal(new StringReader(responseString));

一个人应该做:

JAXBElement<UserType> userElement = unmarshaller.unmarshal(someSource, UserType.class);
UserType user = userElement.getValue();

后一种代码将不需要UserType类级别的@XmlRootElement注释。