Document 按照xml格式输出

    private void GetXMLDocument(Document doc)

    {

         OutputFormat format1 = new OutputFormat("    ", true);

         format1.setEncoding("UTF-8");

          XMLWriter out1=new XMLWriter(new PrintWriter(System.out),format1);

          try {

            out1.write(doc);

            out1.flush();

        } catch (IOException e) {

            e.printStackTrace();

        }

    }