I second the recommendation to use XPath. You could manually traverse the DOM, but why? XPath was designed to solve this problem.
Here's a complete Java JAXP XPath example ( sans error-checking and exception handling).
I second the recommendation to use XPath. You could manually traverse the DOM, but why? XPath was designed to solve this problem.
Here's a complete Java/JAXP/XPath example (sans error-checking and exception handling): import java.io. IOException; import java.io. StringReader; import javax.xml.parsers.
*; import javax.xml.xpath. *; import org. W3c.dom.
Document; import org. W3c.dom. Node; import org.xml.sax.
InputSource; import org.xml.sax. SAXException; public class Xpather { public static void main(String args) throws XPathExpressionException, ParserConfigurationException, SAXException, IOException { DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db = dbf. NewDocumentBuilder(); Document doc = db.
Parse(new InputSource("workbook. Xml")); XPath xpath = XPathFactory.newInstance().newXPath(); Node body = (Node) xpath. Evaluate("/request/response/body", doc, XPathConstants.
NODE); System.out. Println(body.getTextContent()); Node url = (Node) xpath. Evaluate("/request/@url", doc, XPathConstants.
NODE); System.out. Println(url.getNodeValue()); } } This code prints the contents of the body element and the value of the url attribute on the request element. Output: booking created!
/devices/test/planner.
Use XPath - also readily available through standard Java APIs. Once you have your Document, Java's XPath can evaluate directly off of it - so having your DocumentBuilder and such will still be used. For example, you can obtain just the element, using /request, or the request's URL, using something like /request/@url.An alternative - especially for high-performance usage scenarios where you may be processing many documents following the same schema - is to use SAX parsing instead, where you will receive an event for every XML element processed, and given its name and list of attributes.
2 Now that StAX is around, there's probably very very few use cases where SAX would be a better choice. (It's also a very vague recommendation. ) – Inerdial 2 days ago.
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