java-以字符串形式获取xml节点的所有内容

private String nodeToString(Node node) {  StringWriter sw = new StringWriter();  try {    Transformer t = TransformerFactory.newInstance().newTransformer();    t.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");    t.transform(new DOMSource(node), new StreamResult(sw));  } catch (TransformerException te) {    System.out.println("nodeToString Transformer Exception");  }  return sw.toString();}