Xpath检索java中节点的属性

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathFactory;

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse("path/to/xml/file.xml");

XPathFactory xPathfactory = XPathFactory.newInstance();
XPath xpath = xPathfactory.newXPath();

String expression = "//node[@attribute='value']";

XPathExpression expr = xpath.compile(expression);

Object result = expr.evaluate(document, XPathConstants.NODESET);
NodeList nodes = (NodeList) result;

for (int i = 0; i < nodes.getLength(); i++) {
    Node node = nodes.item(i);
    String attributeValue = node.getAttributes().getNamedItem("attribute").getNodeValue();
    System.out.println("Attribute value: " + attributeValue);
}