Java对已有excel进行信息追加

private void process(String path, String sheetName, int col, String value) throws Exception {
        File file = new File(path);
        if (!file.exists()) {
            //创建新文件
            FileOutputStream fileOutputStream = new FileOutputStream(file);
            XSSFWorkbook workbook = new XSSFWorkbook();
            workbook.createSheet(sheetName);
            workbook.write(fileOutputStream);
        }
        FileInputStream inputStream = new FileInputStream(file);
        XSSFWorkbook workbook = new XSSFWorkbook(inputStream);
        XSSFSheet sheet = workbook.getSheet(sheetName);
        if (sheet == null) {
            workbook.createSheet(sheetName);
        }
        int lastRowNum = sheet.getPhysicalNumberOfRows();
        XSSFRow row = sheet.createRow(lastRowNum);
        row.createCell(col).setCellValue(value);
        FileOutputStream fileOutputStream = new FileOutputStream(file);
        workbook.write(fileOutputStream);
    }