Java:在org.w3c.dom文档中获取元素的xpath

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.XPathExpressionException;
import javax.xml.xpath.XPathFactory;

public class XPathExample {
    public static void main(String[] args) {
        try {
            // 创建解析器工厂和解析器
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();
            
            // 解析XML文档
            Document document = builder.parse("path/to/your/xml/file.xml");
            
            // 创建XPath对象
            XPath xpath = XPathFactory.newInstance().newXPath();
            
            // 编译XPath表达式
            XPathExpression expression = xpath.compile("/path/to/element");
            
            // 在文档中执行XPath表达式
            NodeList nodeList = (NodeList) expression.evaluate(document, XPathConstants.NODESET);
            
            // 遍历结果节点集
            for (int i = 0; i < nodeList.getLength(); i++) {
                Node node = nodeList.item(i);
                // 处理节点
                System.out.println(node.getNodeName() + ": " + node.getTextContent());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}