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Reading an integer from a numeric cell using Apache POI in java

I have an application that reads an xls sheet using apache poi. When a cell has a numeric value, I read it down the line .getCell (i) .getNumericValue (). But it returns a floating point digit. for example, if the cell value is 1, it returns 1.0. Can I convert it to int? Any help should be appreciated. I tried Integer.parseInt (value) - but it throws a NumberFormat exception. Any help is appreciated. Here's the pseudo code:

FileInputStream file = new FileInputStream(new File("C:\\test.xls"));
HSSFWorkbook workbook = new HSSFWorkbook(file);
HSSFSheet sheet = workbook.getSheetAt(0);
Iterator<Row> rowIterator = sheet.iterator();
while(rowIterator.hasNext()) {
    Row row = rowIterator.next();
    Iterator<Cell> cellIterator = row.cellIterator();
    while(cellIterator.hasNext()) {
        Cell cell = cellIterator.next();
        switch(cell.getCellType()) {
            case Cell.CELL_TYPE_NUMERIC:
                String value= String.valueOf(cell.getNumericCellValue());
                int intVal = Integer.parseInt(value)-->>throws Exception
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7 replies


You can read int value as apache poi string using simple steps

First count the rows in sheets using below method

private  int getRowCount(Sheet currentSheet) {
        int rowCount = 0;
        Iterator<Row> rowIterator = currentSheet.iterator();

        while(rowIterator.hasNext()) {  
            Row row = rowIterator.next();

            if(row == null || row.getCell(0) == null || row.getCell(0).getStringCellValue().trim().equals("") || row.getCell(0).toString().trim().equals("") 
                    || row.getCell(0).getCellType()==Cell.CELL_TYPE_BLANK){
                break;
            }
            else
                rowCount=rowCount + 1;
        }       
        return rowCount;
    }


Then use below code in your method

    Workbook workbook = WorkbookFactory.create(new File("c:/test.xls");
    Sheet marksSheet = (Sheet) workbook.getSheet("Sheet1");
            int zoneLastCount = 0;
            if(marksSheet !=null ) {
                zoneLastCount = getRowCount(marksSheet);
            }
    int zone = zoneLastCount-1;
    int column=1

    for(int i = 0; i < zone; i++) {         
        Row currentrow = marksSheet.getRow(i);
        double year = Double.parseDouble(currentrow.getCell(columnno).toString());
        int year1 = (int)year;
        String str = String.valueOf(year1);
    }
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Numbers in Excel (except for a few edge cases) stored as floating point numbers. Floating point numbers in Java when formatted as a string are printed with a trailing decimal point as you see

Assuming what you really wanted is "give me a string that looks like what Excel shows for this cell" and then don't call cell.toString (). It won't give you what you want most of the time

Instead, you need to use the DataFormatter class , which provides methods that read the Excel format rules applied to the cell, and then re-create (as far as possible) those in Java



Your code should be:

Workbook wb = WorkbookFactory.create(new File("c:/test.xls");
DataFormatter fmt = new DataFormatter();
Sheet sheet = wb.getSheetAt(0);
for (Row row : sheet) {
     Cell cell = row.getcell(0, Row.RETURN_BLANK_AS_NULL);
     if(cell!=null) {
          String value = fmt.formatCellValue(cell);
          if (! value.trim().isEmpty()) {
             System.out.println("Cell as string is " + value);
          }
     }
 }

You may notice that I also fixed a bunch of other things ...!

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Someone may find this hack useful:

cell.setCellType(CellType.STRING);
int value = Integer.parseInt(cell.getStringCellValue());

Remember that you are changing the cell type here, so make sure there are no side effects. In a single threaded application, you can simply read the type before and restore it after.

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You can just type cast float

to int

like:

String value = String.valueOf((int)cell.getNumericCellValue());
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Cell cell = row.getCell(cellCpt);

String cellContent = "";
if (cell != null) {
    cell.setCellType(CellType.STRING);
    cellContent = fmt.formatCellValue(cell);
}
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Try the following (to get the long one):

long value = (long) currentCell.getNumericValue();
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  // to extract the exact numerical value either integer/double
  DataFormatter fmt = new DataFormatter();
  Iterator<Cell> cellIterator = row.cellIterator();
  while (cellIterator.hasNext()) {
    Cell cell = cellIterator.next();
    switch (cell.getCellType()) {
      case NUMERIC:
        if (DateUtil.isCellDateFormatted(cell)) {
          Date date = cell.getDateCellValue();
          DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd");
          //DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
          fetchedRow.add(dateFormat.format(date));
        } else {
          fetchedRow.add(fmt.formatCellValue(cell));
        }
        rowEmpty = false;
        break;
      case STRING:
        fetchedRow.add(cell.toString());
        rowEmpty = false;
        break;
      case BOOLEAN:
        fetchedRow.add(cell.toString());
        rowEmpty = false;
        break;
      case FORMULA:
        fetchedRow.add(Double.toString(cell.getNumericCellValue()));
        rowEmpty = false;
        break;
      case BLANK:
        fetchedRow.add("");
        break;
    }
  }
  if (!rowEmpty) {
    allRows.add(fetchedRow.toArray(new String[0]));
    count++;
  }
  if (count >= limit) {
    break;
  }
}
return allRows;

}

eaxmple to read a limited number of rows and use DataFormatter to give an exact numeric value or an integer / double value. This will work

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