Sheet sheet = wb.getSheetAt(i);
for (Iterator<Row> rit = sheet.rowIterator(); rit.hasNext();) {
Row r = rit.next();
for (Iterator cit = r.cellIterator(); cit.hasNext();) {
XSSFCell c = (XSSFCell) cit.next();
if (c.getCellType() == XSSFCell.CELL_TYPE_FORMULA)
evaluator.evaluateFormulaCell(c);
}
}