使用JAXB2 OXM随属性包含CDATA的Unmarshall

Question

我正在尝试解压缩一个XML，它如下所示：

==============================XML====================================

<Element1>
<innerElement attr1="value1">
    <ConcernedElement FirstAttribute="FirstValue" SecondAttribute="<![CDATA[<AttributeElement aAttribute="aValue" bAttribute="bValue"><vElement vAttrib="aV.Value"></vElement></AttributeElement>]]>"></ConcernedElement>
</innerElement>
</Element1>

架构定义如下：

==============================XSD=================================

<xs:element name="Element1">
    <xs:complexType>
        <xs:sequence>
            <xs:element ref="innerElement" minOccurs="0"/>
        </xs:sequence>
    </xs:complexType>
</xs:element>

<xs:element name="innerElement">
    <xs:complexType>
        <xs:sequence>
            <xs:element ref="ConcernedElement" minOccurs="0"/>
        </xs:sequence>
    </xs:complexType>
</xs:element>

<xs:element name="ConcernedElement">
    <xs:complexType>
        <xs:attribute name="FirstAttribute" type="xs:string"/>
        <xs:attribute name="SecondAttribute" type="xs:string"/>
    </xs:complexType>
</xs:element>

​

每当我试图用这个功能做unmarshall时：

public Object unmarshall(String xml) {
    try {
        StringBuffer stringBuffer = new StringBuffer(xml);
        StringReader stringReader = new StringReader(stringBuffer.toString());
        StreamSource streamSource = new StreamSource(stringReader);
        Object object = customUnmarshaller.unmarshal(streamSource);
        return object;

    } catch (Exception ex) {
        return null;
    }
}

我得到一个异常，即SecondAttribute包含一个无效字符<。

===================EXCEPTION THROWN======================

ex = (org.springframework.oxm.UnmarshallingFailureException) org.springframework.oxm.UnmarshallingFailureException: JAXB unmarshalling exception; nested exception is javax.xml.bind.UnmarshalException
 - with linked exception:
[org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 159; The value of attribute "SecondAttribute" must not contain the '<' character.]

此外，执行XML验证表明XML无效。

还有什么是我需要做的或者是我错过的配置吗？我该怎么解决这个问题？

Answer 1

我得从某种程度上解决。

我所做的是转义SecondAttribute的值，并用转义值替换XML中的原始值.这样，Marshaller就能够对整个XML和SecondAttribute进行正确检索。

public String getEscappedConcernedElementXML(String sourceXML) {
    String concernedElementXMLString = findConcernedElementInXML(sourceXML);
    if (concernedElementXMLString == null || (concernedElementXMLString.equal(""))) {
        return concernedElementXMLString;
    }

    concernedElementXMLString = escapeSecondAttributeValueInXML(corcernedElementXMLString);

    return concernedElementXMLString;
}


public String escapeSecondAttributeValueInXML(String sourceXML) {
    String secondAttributeStartCursor = "SecondAttribute=\"";
    int secondAttributeIndex = sourceXML.indexOf(secondAttributeStartCursor);

    String secondAttributeEndCursor = "\">";
    int secondAttributeEndIndex = sourceXML.indexOf(secondAttributeEndCursor, secondAttributeIndex);


    String secondAttributeValue = sourceXML.substring(secondAttributeIndex + secondAttributeStartCursor.length(), secondAttributeEndIndex);
    String escappedSecondAttributeValue = StringEscapeUtils.escapeXml(secondAttributeValue);

    return sourceXML.replace(secondAttributeValue, escappedSecondAttributeValue);
}

然后，对XML进行解组将为适当的对象提供属性值。