private void loadFile() throws IOException {
        InputStream inp = new FileInputStream(inputFile);
        //InputStream inp = new FileInputStream("workbook.xlsx");

        Workbook wb = new XSSFWorkbook(inp);
        Sheet sheet = wb.getSheetAt(0);
        int lastRowNum = sheet.getLastRowNum();
        for (int i = 0; i <= lastRowNum; i++) {
            Row row = sheet.getRow(i);
            List<String> list = Lists.newLinkedList();
            int lastCellNum = row.getLastCellNum();
            for (int j = 0; j < lastCellNum; j++) {
                if (i == 0) {
                    tabList.add(getValueFromCell(row.getCell(j)));
                } else {
                    list.add(getValueFromCell(row.getCell(j)));
                }

            }
            if (i != 0)
                this.data.add(list);
        }
        inp.close();
    }