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这与我之前的问题有关，该问题通常更针对 JAXB。但是这个问题更具体地与spring-oxm. 我正在寻找是否可以使用 spring-oxm unmarshaller 从我的 XML 中仅解组特定元素。

我的 XSD 是：

<xs:schema version="1.3"
  targetNamespace="https://www.domain.com/schema/reports/export/1.0"
  xmlns:tns="https://www.domain.com/schema/reports/export/1.0"
  xmlns:xs="http://www.w3.org/2001/XMLSchema"
  elementFormDefault="qualified">

<xs:element name="detailedreport">
  <xs:complexType>
    <xs:sequence>
      <xs:element name="severity" minOccurs="6" maxOccurs="6" type="tns:SeverityType" />
    </xs:sequence>
    </xs:complexType>
</xs:element>

<xs:complexType name="SeverityType">
  <xs:sequence>
    <xs:element name="category" minOccurs="0" maxOccurs="unbounded" type="tns:CategoryType"/>
  </xs:sequence>
</xs:complexType>

<xs:complexType name="CategoryType">
  <xs:sequence>
    <xs:element name="cwe" maxOccurs="unbounded" type="tns:CweType"/>
  </xs:sequence>
</xs:complexType>

<xs:complexType name="CweType">
  <xs:sequence>
    <xs:element name="staticflaws" type="tns:FlawListType" minOccurs="0"/>
  </xs:sequence>
</xs:complexType>

<xs:complexType name="FlawListType">
  <xs:sequence>
    <xs:element name="flaw" minOccurs="0" maxOccurs="unbounded" type="tns:FlawType" />
  </xs:sequence>
</xs:complexType>
</xs:schema>

使用一些预处理，我可以找到“cwe”类型的所有节点：

    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    DocumentBuilder db = dbf.newDocumentBuilder(); 
    Document doc = db.parse(IOUtils.toInputStream(xml));
    NodeList nodeList = doc.getElementsByTagName("cwe");

使用 JAXBUnmarshaller，我可以设法解组我的对象：

    JAXBContext jc = JAXBContext.newInstance( CweType.class );
    Unmarshaller u = jc.createUnmarshaller();
    u.unmarshal(new DOMSource(nodeList.item(0)),  CweType.class);

但是，如果我尝试使用 spring-oxm unmarshaller 的概念，则会出现错误。

    Jaxb2Marshaller jaxb2Marshaller = new Jaxb2Marshaller();
    jaxb2Marshaller.setClassesToBeBound(CweType.class);
    jaxb2Marshaller.unmarshal(new DOMSource(nodeList.item(0)));



org.springframework.oxm.UnmarshallingFailureException: JAXB unmarshalling exception; nested exception is javax.xml.bind.UnmarshalException: unexpected element (uri:"", local:"cwe"). Expected elements are (none)
    at org.springframework.oxm.jaxb.Jaxb2Marshaller.convertJaxbException(Jaxb2Marshaller.java:911)
    at org.springframework.oxm.jaxb.Jaxb2Marshaller.unmarshal(Jaxb2Marshaller.java:784)
    at org.springframework.oxm.jaxb.Jaxb2Marshaller.unmarshal(Jaxb2Marshaller.java:753)

@M.Deinum 在评论中建议尝试 XPath，但我并不担心更好 - 在解组时抛出相同的错误：

   XPath xPath = XPathFactory.newInstance().newXPath();
    NodeList xpnl = (NodeList)xPath.compile("//cwe").evaluate(doc, XPathConstants.NODESET);
    jaxb2Marshaller.unmarshal(new DOMSource(xpnl.item(0)));

我究竟做错了什么？我创建 DOMSource() 的方式有问题吗？为什么我可以直接使用 JAXBUnmarshaller 解组，但不能使用 Spring 包装器？无论如何通过spring-oxm unmarshaller显式声明declaredType？

CweType.java：

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "CweType", propOrder = {
    "description",
    "staticflaws",
    "dynamicflaws",
    "manualflaws"
})
public class CweType {

    @XmlElement(required = true)
    protected CweType.Description description;
    protected FlawListType staticflaws;
    protected FlawListType dynamicflaws;
    protected FlawListType manualflaws;
    @XmlAttribute(name = "cweid", required = true)
    @XmlSchemaType(name = "positiveInteger")
    protected BigInteger cweid;
    ...
    ....
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1 回答 1

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 public static CweType unmarshal(DOMSource node) throws JAXBException {
    JAXBContext jaxbContext = JAXBContext.newInstance(CweType.class);
    Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();

    JAXBElement<CweType> root = jaxbUnmarshaller.unmarshal(node, CweType.class);
    CweType cweType= root.getValue();

    LOGGER.info(cweType.toString());
    return cweType;
}

DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder(); 
Document doc = db.parse(IOUtils.toInputStream(xml));
NodeList nodeList = doc.getElementsByTagName("cwe");
CweType type = unmarshal(new DOMSource(nodeList.item(0));

我希望这会有所帮助！

于 2016-04-25T13:42:27.760 回答