Poi-读取Excel2003/Excel2007及兼容性问题

void toInExcel(@RequestParam("file") MultipartFile file) throws Exception{
        //String filepath = "D:/cData07.xlsx";
        //InputStream is = new FileInputStream(filepath);
        InputStream is = file.getInputStream();

        //获取文件后缀(2003)xls|(2007)xlsx
        String fileName = file.getOriginalFilename();
        String suffix = fileName.substring(fileName.lastIndexOf("."));

        //2003版本
        //Workbook workbook = new HSSFWorkbook(is);
        //2007版本
        //Workbook workbook = new XSSFWorkbook(is);
        //推荐使用poi-ooxml中的WorkbookFactory.create(is)来创建Workbook,因为HSSFWorkbook和XSSFWorkbook都实现了Workbook接口
        Workbook wbc = WorkbookFactory.create(is);
        Sheet sheet = wbc.getSheetAt(1);
        int rowNum = sheet.getLastRowNum();
        Row row = sheet.getRow(0);
        int colNum = row.getPhysicalNumberOfCells();
        System.out.println("rowNum:"+rowNum+"   colNum:"+colNum);
        //从1开始，跳过表头的标题
        for (int i = 1; i <= rowNum; i++) {
            row = sheet.getRow(i);
            for (int j = 0; j < colNum; j++){
                Object obj = getCellFormatValue(row.getCell(j));
                System.out.println("obj["+i+"*"+j+"]======================"+obj);
            }
        }
    }

static Object getCellFormatValue(Cell cell) {
        Object cellvalue = "";
        if (cell != null) {
            /*
            _NONE(-1),
            NUMERIC(0),
            STRING(1),
            FORMULA(2),
            BLANK(3),
            BOOLEAN(4),
            ERROR(5);
            */
            switch (cell.getCellTypeEnum()) {
                case _NONE: {
                    cellvalue = "_NONE";
                    break;
                }
                case NUMERIC: {
                    cellvalue = cell.getNumericCellValue();
                    break;
                }
                case STRING: {
                    cellvalue = cell.getStringCellValue();
                    break;
                }
                case FORMULA: {
                    cellvalue = cell.getCellFormula();
                    break;
                }
                case BLANK: {
                    cellvalue = "";
                    break;
                }
                case BOOLEAN: {
                    cellvalue = cell.getBooleanCellValue();
                    break;
                }
                case ERROR: {
                    cellvalue = cell.getErrorCellValue();
                    break;
                }
                default: {
                    cellvalue = "";
                    break;
                }
            }
        }
        return cellvalue;
    }