Java将org.w3c.dom.Element对象转换成xml字符串并且不带命名空间

public static String doc2String(org.w3c.dom.Element document)    {        String s = "";        try        {            TransformerFactory tFactory = TransformerFactory.newInstance();            Transformer transformer = tFactory.newTransformer();            Source source = new DOMSource(document);            StringWriter out = new StringWriter();            Result output = new StreamResult(out);            transformer.transform(source, output);            out.flush();            s = out.toString();        }        catch (Exception ex)        {            ex.printStackTrace();        }        return s.substring(38);    }