java通过XPATH解析XML

http://www.oschina.net/code/snippet_573074_12408

package testXpath;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.util.HashMap;import java.util.Map;import javax.xml.transform.Transformer;import javax.xml.transform.TransformerException;import javax.xml.transform.TransformerFactory;import javax.xml.transform.dom.DOMResult;import javax.xml.transform.stream.StreamSource;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.NodeList;public class TestXpathExample {public static void main(String args[]) throws FileNotFoundException, TransformerException, XPathExpressionException{TransformerFactory transFact = TransformerFactory.newInstance();Transformer transFormer = transFact.newTransformer();DOMResult dom = new DOMResult();transFormer.transform(new StreamSource(new FileInputStream(new File("test.xml"))), dom);XPath xpath = XPathFactory.newInstance().newXPath();@SuppressWarnings("serial")Map<String,String> prefix2uri = new HashMap<String,String>(){{put("foo","http://www.baidu.com");put("bar","http://www.google.com");}};@SuppressWarnings("serial")Map<String,String> uri2prefix = new HashMap<String,String>(){{put("http://www.baidu.com","foo");put("http://www.google.com","bar");}};xpath.setNamespaceContext(new NsSolver(prefix2uri,uri2prefix));XPathExpression expression = xpath.compile("//player");NodeList nodeList = (NodeList)expression.evaluate(dom.getNode(),XPathConstants.NODESET);for(int i = 0; i < nodeList.getLength(); i++){System.out.println(nodeList.item(i).getNodeName());}}}