org.w3c.dom.Node 转换成xml string

/**
	 * 将传入的一个DOM Node对象输出成字符串。如果失败则返回一个空字符串""。
	 * 
	 * @param node
	 *            DOM Node 对象。
	 * @return a XML String from node
	 */
	public static String NodetoString(Node node) {
		Transformer transformer = null;
		String result = null;
		if (node == null) {
			throw new IllegalArgumentException();
		}
		try {
			transformer = TransformerFactory.newInstance().newTransformer();
		} catch (Exception e) {
			throw new RuntimeException(e.getMessage());
		}
		if (transformer != null) {
			try {
				StringWriter sw = new StringWriter();
				transformer
						.transform(new DOMSource(node), new StreamResult(sw));
				return sw.toString();
			} catch (TransformerException te) {
				throw new RuntimeException(te.getMessage());
			}
		}
		return result;
	}
           

若传入的Node 属性查出来的值，调用该方法只能得到

<?xml version="1.0" encoding="UTF-8"?>和属性值

Node 有个方法getOwnerDocument()可以获得到Document对象，也可以把Node转换成String(但是该得到的是所有节点的内容，而不是单个你想要查看节点的内容)

public static String toString(Document doc)
			throws TransformerFactoryConfigurationError, TransformerException {
		DOMSource source = new DOMSource(doc);
		StringWriter writer = new StringWriter();
		Result result = new StreamResult(writer);
		Transformer transformer = TransformerFactory.newInstance()
				.newTransformer();
		transformer.setOutputProperty(OutputKeys.INDENT, "yes");
		transformer.setOutputProperty(OutputKeys.CDATA_SECTION_ELEMENTS, "yes");
		transformer.setOutputProperty(
				"{http://xml.apache.org/xslt}indent-amount", "2");
		transformer.transform(source, result);
		String string = (writer.getBuffer().toString());
		System.out.print(string);
		return string;
	}