I have a DOM Document (org.w3c.dom) but I need to be able to find elements by XPath and such. Which parser or library out there can provide this feature?
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4 Answers
http://download.oracle.com/javase/6/docs/api/javax/xml/xpath/package-summary.html
The end of the page even has an example on how to use XPath on a DOM document :
// parse the XML as a W3C Document
DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document document = builder.parse(new File("/widgets.xml"));
XPath xpath = XPathFactory.newInstance().newXPath();
String expression = "/widgets/widget";
Node widgetNode = (Node) xpath.evaluate(expression, document, XPathConstants.NODE);
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If you already havea Document then you don't need a parsers, as the XML is already parsed.
There's the javax.xml.xpath package that provides XPath functionality.
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My preferred xpath library is jaxen. It's simple to use and powerful. Sample usage (exceptions deferred):
List<Node> matchingNodes = new DOMXPath("//myxpath").selectNodes(document);
