使用 apache poi 公式评估评估 COUNTIF function 时给出错误值

Question

I have one excel workbook file in which there are 2 sheets. Sheet 1 has two columns which are just like values and criteria's like

and the other sheet has formula defined as =COUNTIF(Sheet1:A2,A13:Sheet1!B2:B4)

so other sheet looks like

Now when I am reading this second sheet, I want to evaluate the formula to extract the correct values from the workbook but it is giving all wrong values. Code is as follows:

try {
    fis = new FileInputStream(fileName);
    workbook = new XSSFWorkbook(fis);
} catch (IOException e) {
    e.printStackTrace();
}
FormulaEvaluator evaluator = workbook.getCreationHelper().createFormulaEvaluator();

Iterator<Row> rowIterator = workbook.getSheetAt(1).iterator();
while (rowIterator.hasNext()) {
    Row row = rowIterator.next();
    Iterator<Cell> cellIterator = row.cellIterator();

    while (cellIterator.hasNext()) {
        Cell cell = cellIterator.next();
        if (cell.getCellType() == CellType.FORMULA) {
            String cellFormula = cell.getCellFormula();
            System.out.println("Cell Formula=" + cellFormula);
            CellType cellType = evaluator.evaluateFormulaCell(cell);
            if (cellType == CellType.NUMERIC) {
                System.out.println(cell.getNumericCellValue());
            }

        } else if (cell.getCellType() == CellType.NUMERIC)
            System.out.println(cell.getNumericCellValue());
    }
}
closeFIS();

Could some one please point me what wrong I am doing here...

Answer 1

Used as normal worksheet function, COUNTIF does not use a cell range as second parameter but only one value or one cell reference.

If you have =COUNTIF(Sheet1:A2,A13:Sheet1!B2:B4) as formula in a sheet, then you are using that function as dynamic array formula using spilled array behavior . Current Excel versions provide this. But Apache POI (current versions of January 2023) cannot evaluate such formulas properly.

If you would have normal worksheet functions in your Sheet2, such as:

=COUNTIF(Sheet1:A2,A13,Sheet1!B2) in Sheet2!A1

=COUNTIF(Sheet1:A2,A13,Sheet1!B3) in Sheet2!A2

=COUNTIF(Sheet1:A2,A13,Sheet1!B4) in Sheet2!A3

then formula evaluation should work.