Question

I am developing a web application which reads data from excel file (xlsx). I am using POI for reading excel sheet. The problem is when I try to read excel file, the server throws the following error:

The excel file I am trying to read has size of almost 80 MB. Any solution to this problem?

Actually user is uploading file and application after saving file to disk try to read file.
The code snippet I am using for testing is:

 File savedFile = new File(file_path);

FileInputStream fis = null;
            try {

                fis = new FileInputStream(savedFile);
                XSSFWorkbook xWorkbook = new XSSFWorkbook(fis);
                XSSFSheet xSheet = xWorkbook.getSheetAt(5);

                Iterator rows = xSheet.rowIterator();
                while (rows.hasNext()) {
                    XSSFRow row = (XSSFRow) rows.next();
                    Iterator cells = row.cellIterator();

                    List data = new ArrayList();
                    while (cells.hasNext()) {
                        XSSFCell cell = (XSSFCell) cells.next();
                        System.out.println(cell.getStringCellValue());
                        data.add(cell);
                    }

                }
            } catch (IOException e) {
                e.printStackTrace();
            } 

Answer 1

I have solved the problem through change in implementation. Actually firstly I was fetching all data from Excel file and data was being stored in ArrayList type. After that I was inserting data into DB and that was the real problem. Now I am not storing data at all. As I get one record from ResultSet, I insert it into DB immediately instead of storing it into arraylist. I know this one by one insertion is not a good approach but for time being I am using this approach. In future if I find better one, I definitely switch to that one. Thanks to all.