html怎么抓取xml内的内容,Java HTML/XML - 如何从.xsp格式的xml中提取内容

import java.io.IOException;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import javax.xml.parsers.ParserConfigurationException;

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;

import org.w3c.dom.Document;

import org.w3c.dom.NodeList;

import org.xml.sax.SAXException;

public class Main {

public static void main(String[] args) throws ParserConfigurationException,

SAXException, IOException, XPathExpressionException {

DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();

domFactory.setNamespaceAware(true);

DocumentBuilder builder = domFactory.newDocumentBuilder();

Document doc = builder.parse("books.xml");

XPathFactory factory = XPathFactory.newInstance();

XPath xpath = factory.newXPath();

XPathExpression expr = xpath.compile("//numDocs");

Object result = expr.evaluate(doc, XPathConstants.NODESET);

NodeList nodes = (NodeList) result;

for (int i = 0; i < nodes.getLength(); i++) {

System.out.println(nodes.item(i).getNodeValue());

}

}

}