Binding EclipseLink MOXy：绑定使用解组器，但不使用绑定器

我使用相同的绑定配置进行解组，一次使用解组器，一次使用绑定器。第一种方法工作正常，第二种方法抛出异常。原因是什么

输入：

<?xml version="1.0" encoding="UTF-8"?>
<foo:root xmlns:foo="http://www.domain.org/foo">test</foo:root>

演示：

<?xml version="1.0"?>
<xml-bindings
 xmlns="http://www.eclipse.org/eclipselink/xsds/persistence/oxm"
 package-name="test">

<xml-schema element-form-default="QUALIFIED" namespace="http://www.domain.org/foo">
  <xml-ns prefix="foo" namespace-uri="http://www.domain.org/foo" />
</xml-schema>

<java-types>        
  <java-type name="Root">
    <xml-root-element name="root"/>
    <java-attributes>
      <xml-value java-attribute="text"/>
    </java-attributes>
  </java-type>
</java-types>

</xml-bindings>

package test;

public class Root {

private String text;

public String getText() {
    return text;
}

public void setText(String text) {
    this.text = text;
}
}

Map<String, Object> jaxbContextProperties = new HashMap<String, Object>(1);
jaxbContextProperties.put(JAXBContextProperties.OXM_METADATA_SOURCE, "bindings.xml");
JAXBContext jaxbContext = JAXBContextFactory.createContext(new Class[] { Root.class}, jaxbContextProperties);
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
Root root = (Root)unmarshaller.unmarshal(new File("input.xml"));

DocumentBuilder documentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document document = documentBuilder.parse(new File("input.xml"));
Binder<Node> binder = jaxbContext.createBinder();
root = (Root) binder.unmarshal(document);

Exception in thread "main" javax.xml.bind.UnmarshalException - with linked exception:
[Exception [EclipseLink-25008] (Eclipse Persistence Services - 2.5.0.v20130507- 3faac2b): org.eclipse.persistence.exceptions.XMLMarshalException
Exception Description: A descriptor with default root element foo:root was not found in the project]

您只需将代码更改为如下所示，以确保您的

DocumentBuilderFactory

具有名称空间感知功能即可：

DocumentBuilderFactory DocumentBuilderFactory=DocumentBuilderFactory.newInstance（）；
documentBuilderFactory.setNamespaceAware（true）；
DocumentBuilder DocumentBuilder=documentBuilderFactory.newDocumentBuilder（）；
documentdocument=documentBuilder.parse（新文件（“input.xml”）；