java在解组xml时忽略前缀（命名空间）

Question

我有以下XML：

<?xml version="1.0" encoding="UTF-8"?>
<s:XXMsg xmlns:s="com:sample:test:msg">
    <s:Header>
        <s:cpyCod>xxx</s:cpyCod>
        <s:appCod>yyy</s:appCod>
    </s:Header>
</s:XXMsg>

我希望将其解组到以下Java类中：

public class XXHeader
{
    private String cpyCod;
    private String appCod;
}

我编写了以下代码：

    XMLInputFactory inputFactory = XMLInputFactory.newInstance();
    inputFactory.setProperty(XMLInputFactory.IS_NAMESPACE_AWARE, true);
    try
    {
        XMLStreamReader streamReader = inputFactory
            .createXMLStreamReader(Test.class.getClassLoader().getResourceAsStream("xxmsg.xml"));
        while (streamReader.hasNext())
        {
            int next = streamReader.next();
            if (streamReader.getEventType() == XMLStreamReader.START_ELEMENT
                && streamReader.getLocalName().equals("Header"))
            {
                JAXBContext context = JAXBContext.newInstance(XXHeader.class);
                Unmarshaller unmarshaller = context.createUnmarshaller();
                XXHeader xxHeader = unmarshaller.unmarshal(streamReader, XXHeader.class).getValue();
                System.out.println(xxHeader);
                break;
            }
        }

我将XXHeader的所有字段值作为null获取。但是如果我确实更改了xml并删除了每个元素中的前缀s:，那么我就得到了正确的值

如何在解组以获得正确值时忽略此前缀

PS：不鼓励在XXHeader类中使用@XML**注释

Answer 1

我可以使用前面提到的here来实现这一点：

public class XXHeaderXMLReader
    extends StreamReaderDelegate
{

    public XXHeaderXMLReader(XMLStreamReader paramXMLStreamReader)
    {
        super(paramXMLStreamReader);
    }

    @Override
    public String getAttributeNamespace(int paramInt)
    {
        return "";
    }

    @Override
    public String getNamespaceURI()
    {
        return "";
    }

}

并在前面的代码中添加该行：

XMLInputFactory inputFactory = XMLInputFactory.newInstance();
inputFactory.setProperty(XMLInputFactory.IS_NAMESPACE_AWARE, true);
try
{
    XMLStreamReader streamReader = inputFactory
        .createXMLStreamReader(DocumentTest.class.getClassLoader().getResourceAsStream("xxmsg.xml"));
    while (streamReader.hasNext())
    {
        int next = streamReader.next();
        if (streamReader.getEventType() == XMLStreamReader.START_ELEMENT)
        {
            if (streamReader.getLocalName().equals("Header"))
            {
                JAXBContext context = JAXBContext.newInstance(XXHeader.class);
                Unmarshaller unmarshaller = context.createUnmarshaller();
                XXHeaderXMLReader xxHeaderXMLReader = new XXHeaderXMLReader(streamReader);
                XXHeader xxHeader =
                    unmarshaller.unmarshal(xxHeaderXMLReader, XXHeader.class).getValue();
                System.out.println(xxHeader);
                break;
            }
        }
    }
}
catch (XMLStreamException e)
{
    e.printStackTrace();
}
catch (JAXBException e)
{
    e.printStackTrace();
}

Answer 2

Here您可以找到有关忽略名称空间的有用信息，或者您可以定义XML模式（带有字段描述）并使用它来代替com:sample:test:msg