Find All Elements By Tag Name : DOM Element « XML « Java

Find All Elements By Tag Name

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import java.util.LinkedList;
import java.util.List;

import javax.xml.namespace.QName;

import org.w3c.dom.Element;
import org.w3c.dom.Node;

 * Few simple utils to read DOM. This is originally from the Jakarta Commons
 * Modeler.
 * @author Costin Manolache
public class Utils {
  public static List<Element> findAllElementsByTagName(Element elem, String tagName) {
    List<Element> ret = new LinkedList<Element>();
    findAllElementsByTagName(elem, tagName, ret);
    return ret;

  private static void findAllElementsByTagName(Element el, String tagName, List<Element> elementList) {

    if (tagName.equals(el.getTagName())) {
    Element elem = getFirstElement(el);
    while (elem != null) {
      findAllElementsByTagName(elem, tagName, elementList);
      elem = getNextElement(elem);

  private static void findAllElementsByTagNameNS(Element el, String nameSpaceURI, String localName,
      List<Element> elementList) {

    if (localName.equals(el.getLocalName()) && nameSpaceURI.contains(el.getNamespaceURI())) {
    Element elem = getFirstElement(el);
    while (elem != null) {
      findAllElementsByTagNameNS(elem, nameSpaceURI, localName, elementList);
      elem = getNextElement(elem);

  public static Element getFirstElement(Node parent) {
    Node n = parent.getFirstChild();
    while (n != null && Node.ELEMENT_NODE != n.getNodeType()) {
      n = n.getNextSibling();
    if (n == null) {
      return null;
    return (Element) n;

  public static Element getNextElement(Element el) {
    Node nd = el.getNextSibling();
    while (nd != null) {
      if (nd.getNodeType() == Node.ELEMENT_NODE) {
        return (Element) nd;
      nd = nd.getNextSibling();
    return null;



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