Execl读取问题处理数据Number类型以字符串读取 , 读取时间返回数字问题 ,工具类

叁歲伎倆 2022-12-10 07:14 179阅读 0赞

1.Execl的number类型以字符串读取

cell.setCellType(Cell.CELL_TYPE_STRING);
    String value=cell.getStringCellValue();

2.Execl时间日期读出来为数字类型, 修改返回格式为时间格式

private static final DateFormat FORMAT = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
    
    
    int cellType1 = cell.getCellType();
    if(cellType1==0){ //时间读取格式是0 number格式
         if (HSSFDateUtil.isCellDateFormatted(cell)) { //判断是否为时间格式
              Date date = cell.getDateCellValue();
              return FORMAT.format(date);
         }
    }

3.实际应用代码

int cellType1 = cell.getCellType();
            if(cellType1==0){ //为数字
                if (HSSFDateUtil.isCellDateFormatted(cell)) { //判断是否时间格式
                    Date date = cell.getDateCellValue();
                    return FORMAT.format(date);
                }else { //数字其他格式字符串读取
                    cell.setCellType(Cell.CELL_TYPE_STRING);
                    return cell.getStringCellValue();
                }
            }else { //其他字符串读取
                cell.setCellType(Cell.CELL_TYPE_STRING);
                return cell.getStringCellValue();
            }

4.单元格文件类型判断

public static void main(String[] args) throws Exception {
    
            FileInputStream inputStream =
                    new FileInputStream("C:\\Users\\Administrator\\Desktop\\123456.xlsx");
            //Workbook workbook =new HSSFWorkbook(inputStream);  //03版
            Workbook workbook = new XSSFWorkbook(inputStream); //07版
            //Workbook workbook = new SXSSFWorkbook(inputStream); //07超级版
            //获取sheet
            Sheet sheet = workbook.getSheetAt(0);
            //获取标题内容
            Row rowTitle = sheet.getRow(0);
            if(rowTitle!=null){
                //获取列总数 ,遍历第一行,获取表头
                int cellCount = rowTitle.getPhysicalNumberOfCells();
                for (int cellNum = 0; cellNum < cellCount ; cellNum++) {
                    Cell cell = rowTitle.getCell(cellNum);
                    if(cell!=null){
                        cell.setCellType(CellType.STRING);
                        String cellValue = cell.getStringCellValue();
                        System.out.print(cellValue+" | ");
                    }
                }
                System.out.println();
            }
    
            //获取表中的内容
            //获取行的总数
            int rowCount = sheet.getPhysicalNumberOfRows();
            for (int rowNum = 0; rowNum <rowCount ; rowNum++) {
                Row rowData = sheet.getRow(rowNum);
                if(rowData!= null){
                    int cellCount = rowTitle.getPhysicalNumberOfCells();
                    for (int cellNum = 0; cellNum < cellCount; cellNum++) {
                        Cell cell = rowData.getCell(cellNum);
                        if(cell!=null){
                            CellType cellType = cell.getCellTypeEnum();
                            String cellValue="";
                            switch (cellType){
                                case STRING:
                                    cellValue=cell.getStringCellValue();
                                    break;
                                case BOOLEAN:
                                    cellValue= String.valueOf(cell.getBooleanCellValue());
                                    break;
                                case BLANK:
                                    break;
                                case NUMERIC: //数字
                                    if(HSSFDateUtil.isCellDateFormatted(cell)){ //判断是否日期数字
                                        Date date = cell.getDateCellValue();
                                        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                                        cellValue = format.format(date);
                                    }else {
                                        //不是日期格式,防止数字过长
                                        cell.setCellType(CellType.STRING);
                                        cellValue= cell.toString();
                                    }
                                    break;
                                case ERROR:
                                    break;
                            }
                            System.out.print(cellValue+" | ");
                        }
                    }
                }
                System.out.println();
    
                //计算公式
                Row row = sheet.getRow(0);
                Cell cell = row.getCell(0);
                FormulaEvaluator formulaEvaluator = new XSSFFormulaEvaluator((XSSFWorkbook) workbook);
                CellType cellType = cell.getCellTypeEnum(); //获取类型
                switch (cellType){
                    case FORMULA: //公式
                        String formula = cell.getCellFormula(); //公式字符串
                        System.out.println(formula);
                        //计算
                        CellValue evaluate = formulaEvaluator.evaluate(cell);
                        String cellValue = evaluate.formatAsString();
                        System.out.println(cellValue);
                        break;
                }
            }
            inputStream.close();
        }

5.参考地址 [https://blog.csdn.net/qq\_34926773/article/details/90633178][https_blog.csdn.net_qq_34926773_article_details_90633178]

[https_blog.csdn.net_qq_34926773_article_details_90633178]: https://blog.csdn.net/qq_34926773/article/details/90633178