Java program to evaluate formula in an excel file using Apache POI library. Similarly, we want to read a file with formula cells and use the following logic to evaluate formula cells. ("Excel with foumula cells written successfully") Header.createCell(3).setCellValue("Interest (P r t)") ĭataRow.createCell(0).setCellValue(14500d) ĭataRow.createCell(1).setCellValue(9.25) ĭataRow.createCell(3).setCellFormula("A2*B2*C2") įileOutputStream out = new FileOutputStream(new File("formulaDemo.xlsx")) Header.createCell(1).setCellValue("RoI") Header.createCell(0).setCellValue("Pricipal") XSSFSheet sheet = workbook.createSheet("Calculate Simple Interest") Java program to add formula in an excel file using Apache POI library. So the formula will be: A2*B2*C2 (in the second row) The sheet has four cells in a row and the fourth one in the multiplication of all the previous 3 rows. Let’s see one example of how to add formula cells in excel? Apache POI also has excellent support for adding formula cells and evaluating already present formula cells. When working on complex excel sheets, we encounter many cells with formulas to calculate their values. See Also: Apache POI – Read an Excel File using SAX Parser Check the cell type and format accordingly Iterator cellIterator = row.cellIterator() For each row, iterate through all the columns XSSFSheet sheet = workbook.getSheetAt(0) Get first/desired sheet from the workbook XSSFWorkbook workbook = new XSSFWorkbook(file) Create Workbook instance holding reference to. package įileInputStream file = new FileInputStream(new File("howtodoinjava_demo.xlsx")) Java program to read an excel file using Apache POI library. It will read all the column names and the values in it – cell by cell. I am writing the code to read the excel file created in the above example.
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