code: private XMLReader fetchSheetReader() throws SAXException {
  		XMLReader xmlReader = null;
  		try {
  			xmlReader = XMLReaderFactory.createXMLReader(CLASS_SAXPARSER);
  		} catch (SAXException e) {
  			if (e.getMessage().contains("org.apache.xerces.parsers.SAXParser")) {
  				throw new DependencyException(e, "You need to add 'xerces:xercesImpl' to your project and version >= 2.11.0");
  			} else {
  				throw e;
  			}
  		}
  		xmlReader.setContentHandler(this);
  		return xmlReader;
  	}
docs: 获取sheet的解析器
  
  @param sharedStringsTable
  @return {@link XMLReader}
  @throws SAXException SAX异常