>简短的答案：使用XPath local-name().像这样：xPathFactory.newXPath().compile(“// * [local-name()=’requestURL’] / text()”);将返回/ CAMERA / Streaming / status

>或者你可以实现一个NamespaceContext来映射名称空间名称和URI,并在XPath对象之前设置它,然后再查询.

看看这个

blog article

解决方案1样本：

XPath xpath = XPathFactory.newInstance().newXPath();

String responseStatus = xpath.evaluate("//*[local-name()='ResponseStatus']/text()", document);

System.out.println("-> " + responseStatus);

解决方案2样本：

// 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);

编辑

这是一个完整的例子,它正确地检索元素：

String xml = "\r\n" + //

"\r\n" + //

"/CAMERA/Streaming/status\r\n" + //

"4\r\n" + //

"Invalid Operation\r\n" + //

"0\r\n" + //

"\r\n" + //

"";

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() + ")");

}