InputStream is = null;        try {            is = new FileInputStream(filePath);        } catch (FileNotFoundException e1) {            System.out.println("file not found");        }        XSSFWorkbook xwb =null;        try {            xwb= new XSSFWorkbook(is);//新建workbook时需要文件流的方式读入        } catch (IOException e) {            e.printStackTrace();            return false;        }        xwb.setForceFormulaRecalculation(true);//设置更新内容后自动触发计算         XSSFSheet sheet=xwb.getSheetAt(0);        sheet.getRow(2).getCell(col).setCellValue(1);//对于excel的写操作，此处仅用一行代码表示        try {            FileOutputStream fos = new FileOutputStream(filePath);//用文件流的方式将修改后的workbook输出到原文件中            xwb.write(fos);            System.out.println("写入成功");            fos.close();        } catch (IOException e) {            e.printStackTrace();        }