xpath 学习

[java] view plaincopy
import java.io.IOException;  

import javax.xml.parsers.*;
import javax.xml.xpath.*;
import org.w3c.dom.*;
import org.xml.sax.SAXException;  

public class XpathTest {  

    public static void main(String[] args) throws ParserConfigurationException,
            SAXException, IOException, XPathExpressionException {
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        factory.setNamespaceAware(false);
        DocumentBuilder builder = factory.newDocumentBuilder();
        Document doc = builder.parse("C:/Users/Administrator/Desktop/test.xml");
        System.out.println(doc.getChildNodes().getLength());
        XPathFactory xFactory = XPathFactory.newInstance();
        XPath xpath = xFactory.newXPath();
        XPathExpression expr = xpath
                .compile("//name/text()");
        Object result = expr.evaluate(doc, XPathConstants.NODESET);
        NodeList nodes = (NodeList) result;
        System.out.println(nodes.getLength());
        for (int i = 0; i < nodes.getLength(); i++) {
            System.out.println(nodes.item(i).getNodeValue());
        }
    }  

}