Processing XML Documents Partially

   

import java.io.FileInputStream;
import java.io.OutputStreamWriter;

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.traversal.NodeIterator;
import org.xml.sax.InputSource;

import com.sun.org.apache.xpath.internal.CachedXPathAPI;

public class MainClass {
  public static void main(String[] args) throws Exception {
    InputSource in = new InputSource(new FileInputStream("y.xml"));
    DocumentBuilderFactory dfactory = DocumentBuilderFactory.newInstance();
    dfactory.setNamespaceAware(true);
    Document doc = dfactory.newDocumentBuilder().parse(in);

    Transformer transformer = TransformerFactory.newInstance().newTransformer();
    transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");

    CachedXPathAPI path = new CachedXPathAPI();
    NodeIterator nl = path.selectNodeIterator(doc, "\\abc\\");

    Node n;
    while ((n = nl.nextNode()) != null)
      transformer.transform(new DOMSource(n), new StreamResult(new OutputStreamWriter(System.out)));
  }
}