code: public static ExcelReader getReader(InputStream bookStream, boolean closeAfterRead) {
  		try {
  			return getReader(bookStream, 0, closeAfterRead);
  		} catch (NoClassDefFoundError e) {
  			throw new DependencyException(ObjectUtil.defaultIfNull(e.getCause(), e), PoiChecker.NO_POI_ERROR_MSG);
  		}
  	}
docs: 获取Excel读取器，通过调用{@link ExcelReader}的read或readXXX方法读取Excel内容<br>
  默认调用第一个sheet
  
  @param bookStream Excel文件的流
  @param closeAfterRead 读取结束是否关闭流
  @return {@link ExcelReader}
  @since 4.0.3