private Connect() throws IOException{
			//Utilisateur util = new Utilisateur();
			//Fenetre_principale.dir_root = util.getNom();
			bdd_schem_clients.add(tableEleve);
			bdd_schem_clients.add(column_idEleve);
			bdd_schem_clients.add(column_prenomEleve);
			bdd_schem_clients.add(column_nomEleve);
			bdd_schem_clients.add(column_promoEleve);
			bdd_schem_clients.add(column_soldeEleve);
			
			bdd_schem_transactions.add(tableTransactions);
			bdd_schem_transactions.add(column_idTransactions);
			bdd_schem_transactions.add(column_id_eleveTransactions);
			bdd_schem_transactions.add(column_operationTransactions);
			bdd_schem_transactions.add(column_montantTransactions);
			bdd_schem_transactions.add(column_dateTransactions);
			bdd_schem_transactions.add(column_id_utilisateurTransactions);
			
		try {
			if(new File(filepath).exists()){
				CSVReader reader;
				try {
					reader = new CSVReader(new FileReader(filepath));
			    String [] nextLine;
			    while ((nextLine = reader.readNext()) != null) {
			        // nextLine[] is an array of values from the line
			    	if(nextLine.length == 1){
			    		url = nextLine[0]; user = ""; passwd = "";
			    	}
			    	else if(nextLine.length == 2){
			    		url = nextLine[0]; user = nextLine[1]; passwd = "";
			    	}
			    	else if(nextLine.length == 3){
			    		url = nextLine[0]; user = nextLine[1]; passwd = nextLine[2];
			    	}
			    }
			    reader.close();
				} catch (FileNotFoundException e) {
					e.printStackTrace();
				}
				
			}
			System.out.println("Connect : "+Utilisateur.dir_private);
			
			
			if(url.split(":")[1].equals("sqlite")){
				try {
					Class.forName("org.sqlite.JDBC");
				} catch (ClassNotFoundException e) {
					e.printStackTrace();
				}
			}
			conn = DriverManager.getConnection(url);//, user, passwd);
			System.out.println("connection établie !");
		} catch (SQLException e) {
			e.printStackTrace();
			UIManager.put("OptionPane.okButtonText", "fait chier !!!");
			JOptionPane.showMessageDialog(null, "la connexion à la base de donnée a échoué", "erreur de connexion", JOptionPane.ERROR_MESSAGE);
				new Connection_set_adress();
			
		}
	}