Thread: Tableview custom button not responding

so i havebuilt my interface which is made up of a TableView which is populated from Mysql database. the database has fields as ItemID(int), ItemName(varchar)and Fil(BLOB). my tableView has an additional column called 'action' which has a download button such that when clicked, the file should be downloaded and saved in the user's prefered location. Here's the code

 FileDownloadButton.setOnAction(e -> {
 
                                        Item chosenItem = getTableView().getItems().get(getIndex());
                                        File file = new File(chosenItem.getPaperName());
                                        try {
                                            String filequery = "Select File from items Where" + "itemID" + " = " + chosenItem.getId();
                                            PreparedStatement pst = connection.prepareStatement(filequery);
                                            ResultSet rs = pst.executeQuery();
 
                                            FileOutputStream fileout = new FileOutputStream(file);
                                            while (rs.next()) {
                                                InputStream fileinput = rs.getBinaryStream("file");
                                                byte[] buffer = new byte[1024];
                                                while (fileinput.read(buffer) > 0) {
                                                    fileout.write(buffer);
 
                                                }
                                            }

the problem is when i click the download button, nothing happens.
kindly help.
thank you