xml合并

利用xslt模板进行合并

	/*
	 * 合并xml文件
	 */
	public void testMerge() throws Exception{
		
		String aa = "F:/workspace/bme/mystudy/uconfig/11.xml";
		String bb  = "F:/workspace/bme/mystudy/uconfig/22.xml";
		System.out.println(XmlUtil.DOM2String(mergeDocumentByXslt(getDocumentByUrl(aa),getDocumentByUrl(bb))));
	}
	
    private Document mergeDocumentByXslt(Document defaultDocument, Document mergedDoc) throws Exception
    {
    	TransformerFactory factory =  new TransformerFactoryImpl();
    	InputStream in = new File("F:/workspace/bme/mystudy/uconfig/uconfig-merge.xslt").toURL().openStream();
    	Templates templates = factory.newTemplates(new StreamSource(in));
        Transformer transformer = templates.newTransformer();
        javax.xml.transform.Source source = new DOMSource(defaultDocument);
        NodeSet nodeSet = new NodeSet(mergedDoc.getChildNodes());
        transformer.setParameter("with", nodeSet);
        Document transformedDoc = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
        DOMResult result = new DOMResult(transformedDoc);
        transformer.transform(source, result);
        return transformedDoc;
    }
    
    private Document getDocumentByUrl(String fileName) throws Exception{
    	  DOMParser parser = new DOMParser();
          parser.setFeature("http://xml.org/sax/features/validation", false);
          parser.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
          InputStream aa = new FileInputStream(fileName);
          parser.parse(new InputSource(aa));
          Document doc = parser.getDocument();
          aa.close();
          return doc;
    }