Java Language XML XPath Evaluation Evaluating a NodeList in an XML document
Example
Given the following XML document:
<documentation>
<tags>
<tag name="Java">
<topic name="Regular expressions">
<example>Matching groups</example>
<example>Escaping metacharacters</example>
</topic>
<topic name="Arrays">
<example>Looping over arrays</example>
<example>Converting an array to a list</example>
</topic>
</tag>
<tag name="Android">
<topic name="Building Android projects">
<example>Building an Android application using Gradle</example>
<example>Building an Android application using Maven</example>
</topic>
<topic name="Layout resources">
<example>Including layout resources</example>
<example>Supporting multiple device screens</example>
</topic>
</tag>
</tags>
</documentation>
The following retrieves all example nodes for the Java tag (Use this method if only evaluating XPath in the XML once. See other example for when multiple XPath calls are evaluated in the same XML file.):
XPathFactory xPathFactory = XPathFactory.newInstance();
XPath xPath = xPathFactory.newXPath(); //Make new XPath
InputSource inputSource = new InputSource("path/to/xml.xml"); //Specify XML file path
NodeList javaExampleNodes = (NodeList) xPath.evaluate("/documentation/tags/tag[@name='Java']//example", inputSource, XPathConstants.NODESET); //Evaluate the XPath
...
