java - 解码 xml 时忽略前缀(命名空间)

Question

我有这个 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>

我希望将其解码到以下 Java 类中:

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

我写了这段代码:

    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 的所有字段值获取为 null。但是，如果我更改 xml 并删除每个元素中的前缀 s:，那么我会得到正确的值。

如何在解码时忽略此前缀以获得正确的值？

PS:不鼓励在 XXHeader 类中使用 @XML** 注释。

Answer 1

我可以使用 StreamReaderDelegate 来完成此操作，如上所述 here :

public class XXHeaderXMLReader
    extends StreamReaderDelegate
{

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

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

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

}

并在之前的代码中添加以下行:

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();
}