Poi-读取Excel2003/Excel2007及兼容性问题

朴灿烈づ我的快乐病毒、 2022-06-01 23:37 238阅读 0赞

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;
        }