Java用POI解析excel并获取所有单元格数据的实例

1.导入POI相关jar包

org.apache.poi jar

2.代码示例

public List getAllExcel(File file, String tableName, String fname,
  String enterpriseId, String reportId, String projectId)
  throws FileNotFoundException, IOException, ClassNotFoundException,
  InstantiationException, IllegalAccessException,
  NoSuchMethodException, SecurityException, IllegalArgumentException,
  InvocationTargetException, ParseException {


  List listt = new ArrayList();

  try {
    FileInputStream fis = new FileInputStream(file);
    Workbook workbook = null;
    if (fname.toLowerCase().endsWith("xlsx")) {
      workbook = new XSSFWorkbook(fis);
    } else if (fname.toLowerCase().endsWith("xls")) {
      workbook = new HSSFWorkbook(new POIFSFileSystem(fis));
    }
    int numberOfSheets = workbook.getNumberOfSheets();

    for (int i = 0; i < numberOfSheets; i++) {
      Sheet sheet = workbook.getSheetAt(i);
      for (int j = 1; j < sheet.getPhysicalNumberOfRows(); j++) { // 获取每行
        XSSFRow row = (XSSFRow) sheet.getRow(j);
        if(row!=null){
          List list = new ArrayList();
          for (int k = 0; k < sheet.getRow(0).getPhysicalNumberOfCells(); k++) { // 获取每个单元格
            Cell cell = row.getCell(k);
            if (cell == null) {
              list.add("");
              continue;
            }
            switch (cell.getCellType()) {
            case Cell.CELL_TYPE_STRING:
              list.add(cell.getRichStringCellValue().getString());
              break;
            case Cell.CELL_TYPE_NUMERIC:
              if (DateUtil.isCellDateFormatted(cell)) {
                list.add(cell.getDateCellValue());
              } else {
                list.add(cell.getNumericCellValue());
              }
              break;
            case Cell.CELL_TYPE_BOOLEAN:
              list.add(cell.getBooleanCellValue());
              break;
            case Cell.CELL_TYPE_FORMULA:
              list.add(cell.getCellFormula());
              break;
            default:
              list.add("");
            break;
          }
        }

        listt.add(getByReflect(tableName, list, enterpriseId,reportId, projectId));
      }
    }
  }
    fis.close();
      } catch (IOException e) {
        e.printStackTrace();
      }
    return listt;
}

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