java - 读取Excel的空白单元格并返回List<List<String>>

Question

我的 Excel 文件有 4 行和 2 列，例如 连续值具有 3 行第一列作为空白值，如下所示

phone       plan
------------------
85366667777 PLATINUM
85367890000 GOLD
85362524232 SILVER
null        SILVER
85362522436 DIAMOND

---

public List<List<String>> readExcelFile(String fileName) {

        try {
            FileInputStream fileInputStream = new FileInputStream(fileName);
            POIFSFileSystem fsFileSystem = new POIFSFileSystem(fileInputStream);
            HSSFWorkbook workBook = new HSSFWorkbook(fsFileSystem);
            HSSFSheet hssfSheet = workBook.getSheetAt(0);
            Iterator<Row> rowIterator = hssfSheet.rowIterator();
            boolean headerRow = true;
            while (rowIterator.hasNext()) {
                if (headerRow == false) {
                String Rows = util.loadfile("config/ConfigValue.properties","NoOfRowsToSkip");
                int i = Integer.parseInt(Rows);
                    HSSFRow hssfRow = (HSSFRow) rowIterator.next();
                    if(hssfRow.getRowNum()==0||hssfRow.getRowNum()<=i){
                           continue; //just skip the rows if row number is 0 TO i
                          }
                    Iterator<Cell> iterator = hssfRow.cellIterator();
                    List cellTempList = new ArrayList();
                    while (iterator.hasNext()) {
                        HSSFCell hssfCell = (HSSFCell) iterator.next();

                    if(hssfCell.getCellType() == hssfCell.CELL_TYPE_NUMERIC)
                        {DecimalFormat df = new DecimalFormat("#");
                        String cellValue=df.format(hssfCell.getNumericCellValue());
                        cellTempList.add(cellValue.toString());

                        }
                         else if(hssfCell.getCellType() == hssfCell.CELL_TYPE_STRING)
                         {
                         cellTempList.add(hssfCell.toString());
                     }

                    }

                    cellDataList.add(cellTempList);
                } else {
                    headerRow = false;
                }
            }
        } catch (Exception e) {

            e.printStackTrace();
            logger.error("Other Exception : " + e.getStackTrace());
        }
        System.out.println(cellDataList); 
        return cellDataList;
    }
    }

输出:[[85366667777，白金]，[85367890000，黄金]，[85362524232，白银]，[白银]，[85362522436，钻石]]

当对应的单元格中没有值时，为什么不打印[null,Silver]或[0,SILVER]？

Answer 1

if(hssfCell.getCellType() == hssfCell.CELL_TYPE_NUMERIC){
    DecimalFormat df = new DecimalFormat("#");
    String cellValue=df.format(hssfCell.getNumericCellValue());
    cellTempList.add(cellValue.toString());
} else if(hssfCell.getCellType() == hssfCell.CELL_TYPE_STRING){
    cellTempList.add(hssfCell.toString());
} else {
    cellTempList.add(null);  // or cellTempList.add("0");
}

您的空单元格既不是字符串也不是数字，因此没有任何内容添加到您的数组中。尝试检查 CELL_TYPE_BLANK。