code: public static byte[] process(CharSequence html) {
  		ByteArrayOutputStream baos = null;
  		try {
  			baos = new ByteArrayOutputStream();
  			process(html, baos);
  			return baos.toByteArray();
  		}
  		finally {
  			if (baos != null) {
  				try {
  					baos.close();
  				}
  				catch (IOException e) {
  					log.warn("Close Byte Array Inpout Stream Error Caused.", e);
  				}
  			}
  		}
  	}
docs: process html to xls
  @param html html char sequence
  @return xls bytes