java中如何使用XPath查找带CDATA标签的节点值

使用XPath在Java中查找带CDATA标签的节点值是一种常见的操作。XPath是一种用于在XML文档中导航和查询节点的语言，它可以帮助我们定位和提取特定的节点值。在Java中，我们可以使用Java标准库中的javax.xml.xpath包来实现XPath的功能。

java
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathFactory;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
public class XPathExample {
    public static void main(String[] args) throws Exception {
        // 创建Document对象
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        DocumentBuilder builder = factory.newDocumentBuilder();
        Document document = builder.parse("example.xml");
        // 创建XPath对象
        XPathFactory xPathfactory = XPathFactory.newInstance();
        XPath xpath = xPathfactory.newXPath();
        // 编写XPath表达式
        XPathExpression expr = xpath.compile("//nodeWithCDATA/text()");
        // 执行XPath表达式并返回结果
        NodeList nodes = (NodeList) expr.evaluate(document, XPathConstants.NODESET);
        // 输出结果
        for (int i = 0; i < nodes.getLength(); i++) {
            System.out.println(nodes.item(i).getNodeValue());
        }
    }
}