- Short answer: use XPath
local-name()
. Like this:xPathFactory.newXPath().compile("//*[local-name()='requestURL']/text()");
will return/CAMERA/Streaming/status
- Or you can implement a
NamespaceContext
that maps namespaces names and URIs and set it on the XPath object before querying. - Take a look at this blog article, Update: the article is down, you can see it on webarchive
Solution 1 sample:
XPath xpath = XPathFactory.newInstance().newXPath();
String responseStatus = xpath.evaluate("//*[local-name()='ResponseStatus']/text()", document);
System.out.println("-> " + responseStatus);
Solution 2 sample:
// load the Document
Document document = ...;
NamespaceContext ctx = new NamespaceContext() {
public String getNamespaceURI(String prefix) {
return prefix.equals("urn") ? "urn:camera-org" : null;
}
public Iterator getPrefixes(String val) {
return null;
}
public String getPrefix(String uri) {
return null;
}
};
XPath xpath = XPathFactory.newInstance().newXPath();
xpath.setNamespaceContext(ctx);
String responseStatus = xpath.evaluate("//urn:ResponseStatus/text()", document);
System.out.println("-> " + responseStatus);
Edit
This is a complete example, it correctly retrieve the element:
String xml = "<urn:ResponseStatus version=\"1.0\" xmlns:urn=\"urn:camera-org\">\r\n" + //
"\r\n" + //
"<urn:requestURL>/CAMERA/Streaming/status</urn:requestURL>\r\n" + //
"<urn:statusCode>4</urn:statusCode>\r\n" + //
"<urn:statusString>Invalid Operation</urn:statusString>\r\n" + //
"<urn:id>0</urn:id>\r\n" + //
"\r\n" + //
"</urn:ResponseStatus>";
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setNamespaceAware(true);
DocumentBuilder builder = factory.newDocumentBuilder();
Document doc = builder.parse(new java.io.ByteArrayInputStream(xml.getBytes()));
XPath xpath = XPathFactory.newInstance().newXPath();
xpath.setNamespaceContext(new NamespaceContext() {
public String getNamespaceURI(String prefix) {
return prefix.equals("urn") ? "urn:camera-org" : null;
}
public Iterator<?> getPrefixes(String val) {
return null;
}
public String getPrefix(String uri) {
return null;
}
});
XPathExpression expr = xpath.compile("//urn:ResponseStatus");
Object result = expr.evaluate(doc, XPathConstants.NODESET);
NodeList nodes = (NodeList) result;
for (int i = 0; i < nodes.getLength(); i++) {
Node currentItem = nodes.item(i);
System.out.println("found node -> " + currentItem.getLocalName() + " (namespace: " + currentItem.getNamespaceURI() + ")");
}