我正在尝试将oracle数据库中的一些值插入JavaFX项目中的表中，没有任何条件可以返回值，但它可以正常工作，但是当我设置条件不起作用时，请帮助我。
例如 ：
从票证中选择*来源=？和目的地=？
public void showResultbetweenSDT(ActionEvent event) throws SQLException{
String source = comboboxSource.getValue().toString();
String destination = comboboxDestination.getValue().toString();
String transportType = comboboxTransportType.getValue().toString();
try {
Connection conn = MyConnectionDB.connect();
this.dataTicket = FXCollections.observableArrayList();
ResultSet rs = conn.createStatement().executeQuery("SELECT * FROM flight where source=? and destination=? ");
ps.setString(3, source);
ps.setString(4, destination);
rs = ps.executeQuery();
while(rs.next()){
int fi=rs.getInt("flightID");
String fc=rs.getString("flightCompany");
String s=rs.getString("source");
String d=rs.getString("destination");
String fd=rs.getString("flightDepartureTime");
String fa=rs.getString("flightArrivalTime");
String fdd=rs.getString("flightDateOfDeparture");
int fct=rs.getInt("flightCost");
// this.dataTicket.add(new ticket(rs.getInt(1),rs.getString(2),rs.getString(3),rs.getString(4),rs.getString(5),rs.getString(6),rs.getString(7),rs.getInt(8)));
this.dataTicket.add(new ticket(fi,fc,s,d,fd,fa,fdd,fct));
}
} catch (SQLException ex) {
System.out.println("error in sql "+ex);
}
this.columnID.setCellValueFactory(new PropertyValueFactory<ticket, Integer>("busFlightID"));
this.columnName.setCellValueFactory(new PropertyValueFactory<ticket, String>("busFlightcompany"));
this.columnSource.setCellValueFactory(new PropertyValueFactory<ticket, String>("busFlightSource"));
this.columnDestination.setCellValueFactory(new PropertyValueFactory<ticket, String>("busFlightDestination"));
this.columnDepartureTime.setCellValueFactory(new PropertyValueFactory<ticket, String>("busFlightDepartureTime"));
this.columnArrivalTime.setCellValueFactory(new PropertyValueFactory<ticket, String>("busFlightArrivalTime"));
this.columnDateofDeparture.setCellValueFactory(new PropertyValueFactory<ticket, String>("busFlightDateofDeparture"));
this.columnCost.setCellValueFactory(new PropertyValueFactory<ticket, Integer>("busFlightCost"));
this.tableResultofFlightOrBus.setItems(null);
this.tableResultofFlightOrBus.setItems(dataTicket);
}