code: public List<List<String>> readExcel2List(InputStream is, int offsetLine, int limitLine, int sheetIndex)
              throws Excel4JException, IOException, InvalidFormatException {
  
          try (Workbook workbook = WorkbookFactory.create(is)) {
              return readExcel2ObjectsHandler(workbook, offsetLine, limitLine, sheetIndex);
          }
      }
docs: 读取Excel表格数据,返回{@code List[List[String]]}类型的数据集合
  
  @param is         待读取Excel的数据流
  @param offsetLine Excel表头行(默认是0)
  @param limitLine  最大读取行数(默认表尾)
  @param sheetIndex Sheet索引(默认0)
  @return 返回{@code List<List<String>>}类型的数据集合
  @throws Excel4JException       异常
  @throws IOException            异常
  @throws InvalidFormatException 异常
  @author Crab2Died