Un exemple autonome de test unitaire pour comprendre comment fonctionne le Template Jaxp13XPathTemplate du framework Spring . Cela sert à ça aussi les tests 
public class XpathSimpleTest {
private String xmlBody = "<root\n" +
"xmlns:h=\"http://www.w3.org/TR/html4/\"\n" +
"xmlns:f=\"http://www.w3schools.com/furniture\">\n" +
"\n" +
"<h:table>\n" +
" <h:tr>\n" +
" <h:td>Apples</h:td>\n" +
" <h:td>Bananas</h:td>\n" +
" </h:tr>\n" +
"</h:table>\n" +
"\n" +
"<f:table>\n" +
" <f:name>African Coffee Table</f:name>\n" +
" <f:width>80</f:width>\n" +
" <f:length>120</f:length>\n" +
"</f:table>\n" +
"\n" +
"</root>";
@org.junit.Test
public void exampleXPathTemplate()
throws javax.xml.parsers.ParserConfigurationException,
org.xml.sax.SAXException,
java.io.IOException {
org.w3c.dom.Document doc = null;
// string xml en Document
javax.xml.parsers.DocumentBuilder db;
javax.xml.parsers.DocumentBuilderFactory
factory = javax.xml.parsers.DocumentBuilderFactory.newInstance();
factory.setNamespaceAware(true);
db = factory.newDocumentBuilder();
java.io.InputStream
is = new java.io.ByteArrayInputStream(xmlBody.getBytes());
doc = db.parse(is);
// get namespace as Hasmap<localName, URI>
java.util.HashMap<String, String> namespaces = new java.util.HashMap<String, String>();
for (int i = 0; i < doc.getDocumentElement().getAttributes().getLength(); i++) {
String localName = doc.getDocumentElement().getAttributes().item(i).getLocalName();
String textContent = doc.getDocumentElement().getAttributes().item(i).getTextContent();
namespaces.put(localName, textContent);
}
// Requete Xpath
javax.xml.transform.dom.DOMSource domSource = new javax.xml.transform.dom.DOMSource(doc);
org.springframework.xml.xpath.XPathOperations
template = new org.springframework.xml.xpath.Jaxp13XPathTemplate();
((org.springframework.xml.xpath.Jaxp13XPathTemplate) template).setNamespaces(namespaces);
junit.framework.Assert.assertEquals(" La valeur root/f:table/f:length ",
"120",
template.evaluateAsString("root/f:table/f:length", domSource));
junit.framework.Assert.assertEquals(" Un path root/f:table/f:pathNexistePas ramène ",
"",
template.evaluateAsString("root/f:table/f:pathNexistePas", domSource));
}
}