How to get attribute value using XPath in Java?

Question

I have below XML to parse using XPath:

<?xml version="1.0" encoding="UTF-8"?> <schema> <element name="name_ele1" id="name_id_1" >test name1</element> <element name="name_ele2" id="name_id_2" >test name2</element> <element name="name_ele2" id="name_id_3" >test name3</element> </schema>

I want to fetch "name" from the xml document based upon the Id I have passed but I am not able to get the required data instead query is returning blank.

XPathExpression expr = xpath.compile("/schema/element[@id='name_id_2']/name/text()");

You're using XPath, not XQuery. Java doesn't support XQuery out of the box. — Jens Erat
– Jens Erat, Commented Aug 12, 2014 at 9:31

Robby Cornelissen · Accepted Answer · 2014-08-12 08:55:07Z

31

Like this:

XPathExpression expr = xpath.compile("/schema/element[@id='name_id_2']/@name");

Your expression attempts to select the text inside the name element, instead of the value of the name attribute.

edited Aug 12, 2014 at 8:55

answered Aug 12, 2014 at 8:47

Robby Cornelissen

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1 Comment

Mohd Arshil Over a year ago

thank you the following expression solved the mentioned problem

Tam · Accepted Answer · 2017-05-24 13:35:41Z

import java.io.File; import java.io.FileInputStream; import java.io.IOException; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import javax.xml.xpath.XPath; import javax.xml.xpath.XPathConstants; import javax.xml.xpath.XPathExpressionException; import javax.xml.xpath.XPathFactory; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.xml.sax.SAXException; public class XMLXpathReadder { public static void main(String[] args) throws SAXException, IOException, ParserConfigurationException, XPathExpressionException { DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db = dbf.newDocumentBuilder(); Document document = db.parse(new FileInputStream(new File("C:\\Test.xml")));// same xml comments as above. XPathFactory xpf = XPathFactory.newInstance(); XPath xpath = xpf.newXPath(); Element userElement = (Element) xpath.evaluate("/schema/element", document, XPathConstants.NODE); System.out.println(userElement.getAttribute("id")); System.out.println(userElement.getAttribute("name")); } }

Above Code work for me.

But how to read values of all elements. I am getting always first elements node only.

<?xml version="1.0" encoding="UTF-8"?> <schema> <element name="name_ele1" id="_1" >test name1</element> <element name="name_ele2" id="_2" >test name2</element> <element name="name_ele2" id="_3" >test name3</element> </schema>

Instead of XPathConstants.NODE, try with XPathConstants.NODESET Object result = expr.evaluate(doc, XPathConstants.NODESET); NodeList nodes = (NodeList) result; for (int i = 0; i < nodes.getLength(); i++) { System.out.println(nodes.item(i).getNodeValue()); } . Please check this link: howtodoinjava.com/xml/java-xpath-tutorial-example

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