XMLUtil { public static void removeAllSubNodesExceptAttributes(Node n) { NodeList childNodes = n.getChildNodes(); List<Node> childNodesToRemove = new ArrayList<Node>(); for (int i = 0; i < childNodes.getLength(); i++) { Node c = childNodes.item(i); if (c.getNodeType() != Node.ATTRIBUTE_NODE) { childNodesToRemove.add(c); } } for (Node c : childNodesToRemove) { n.removeChild(c); } } private  XMLUtil(); static Document parseXML(String xmlAsString); static Document parseXML(InputStream in); static void writeXML(Node xml, File file); static void writeXML(Node xml, OutputStream outputStream); static void removeNodes(Element parent, NodeList elements); static List<Element> getChildElementsByName(Element element,
			String localName); static List<Element> getChildElements(Element element); static void addAsFirstChild(Element element, Element newChild); static QName getQName(Node n); static void removeAllSubNodesExceptAttributes(Node n); static Document createDocument(); static String getContentsOfTextOnlyNode(Node n); static String getXPathForElement(Node e, NamespaceContext ctx); static int getPosition(Element e); static Text appendTextNode(Element e, String contents); static String getTextContent(Node e); static QName resolveQName(String qNameWithPrefix, Element element); static String resolveNamespacePrefix(String prefix, Element element); static QName resolveQNameTargetNS(String sName, Node context, String targetNS);  }
@Test public void testRemoveAllSubNodesExceptAttributes() throws Exception { Document doc = XMLUtil.parseXML(getClass().getResourceAsStream( "testRemoveAllSubNodesExceptAttributes.xml")); Element root = doc.getDocumentElement(); NodeList childNodes = root.getChildNodes(); assertEquals(5, childNodes.getLength()); assertEquals("a", root.getAttribute("a")); assertEquals("b", root.getAttribute("b")); XMLUtil.removeAllSubNodesExceptAttributes(root); childNodes = root.getChildNodes(); assertEquals(0, childNodes.getLength()); assertEquals("a", root.getAttribute("a")); assertEquals("b", root.getAttribute("b")); }