java xml

public class XmlCope {
	public static List<Element> getChildElements(Node pNode)
	{
		List<Element> elements=new ArrayList<Element>();
		NodeList nodeList=pNode.getChildNodes();
		int length=nodeList.getLength();
		for(int i=0;i<length;++i)
		{
			Node node=nodeList.item(i);
			if(node instanceof Element)
				elements.add((Element)node);
		}
		return elements;
	}
	/**
	 * 加載並解析xml文件
	 * @param file 文件
	 * @return  解析後的Document類型
	 */
	public static Document load(File file) {
		Document document = null;
		try {
			DocumentBuilderFactory factory = DocumentBuilderFactory
					.newInstance();
			DocumentBuilder builder = factory.newDocumentBuilder();
			document = builder.parse(file);
			document.normalize();
		} catch (Exception ex) {
			ex.printStackTrace();
		}
		return document;
	}
	/**
	 * 生成新的document
	 * @return 新的 document
	 */
	public static Document newdocument() {
		Document document = null;
		try {
			DocumentBuilderFactory factory = DocumentBuilderFactory
					.newInstance();
			DocumentBuilder builder = factory.newDocumentBuilder();
			document = builder.newDocument();
		} catch (Exception ex) {
			ex.printStackTrace();
		}
		return document;
	}
	/**
	 * 保存document 到指定的文件
	 * @param document  要保存的document
	 * @param filename  保存位置
	 * @return  是否保存成功
	 */
	  public static boolean doc2XmlFile(Document document, File file) {
	        boolean flag = true;
	        try {
	           
	            TransformerFactory tFactory = TransformerFactory.newInstance();
	            Transformer transformer = tFactory.newTransformer();
	            transformer.setOutputProperty(OutputKeys.INDENT, "yes");
	            transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
	            
	            // transformer.setOutputProperty(OutputKeys.ENCODING, "GB2312");
	            DOMSource source = new DOMSource(document);
	            StreamResult result = new StreamResult(file);
	            transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
	            transformer.transform(source, result);
	        } catch (Exception ex) {
	            flag = false;
	            ex.printStackTrace();
	        }
	        return flag;
	    }

}