我有一个包含3个场景的JavaFX,我们将它们称为A,B,C。从场景A,我通过按一个按钮转到场景B。从场景B,我以相同的方式转到场景C。现在出现了问题。在C场景中,我需要A场景中文本字段中的数据。我尝试在C控制器中创建一个类成员字段,并从A场景中进行设置,但它不起作用,因为转到场景C,我在场景B中调用load()方法(因此,基本上,这是C控制器的新实例)。
好的,所以我有了带有相应控制器的ResetPasswordPage.fxml:
public class ResetPasswordPageController {
private Databaseaccess databaseaccess = new Databaseaccess();
private String username;
@FXML
private TextField userFieldResetPasswordPage;
@FXML
void goToVerificationPage(actionEvent event) {
ResultSet resultSet = databaseaccess.executeSelectQuery("SELECT email FROM USER WHERE username = ?",new Object[] { userFieldResetPasswordPage.getText() });
try {
if (!resultSet.next()) {
System.out.println("User doesn't exist");
return;
}
String email = resultSet.getString("email");
this.username = userFieldResetPasswordPage.getText();
FXMLLoader fxmlLoader = new FXMLLoader(getclass().getResource("NewPasswordPage.fxml"));
Parent parent = fxmlLoader.load();
NewPasswordPageController newPasswordPageController = fxmlLoader.getcontroller();
newPasswordPageController.setUser(userFieldResetPasswordPage.getText()); // this is useless since I dont't
// go directly to
// NewPasswordPage,so I will
// have to call load method once
// again from the next screen
int key = EmailSender.generateRandomKey();
EmailSender.sendEmail(email,key);
FXMLLoader fxmlLoader1 = new FXMLLoader(getclass().getResource("CodeVerificationPage.fxml"));
Parent parent1 = fxmlLoader1.load();
CodeVerificationPageController codeVerificationPageController = fxmlLoader1.getcontroller();
codeVerificationPageController.setGeneratedKey(key);
Utilities.changeScene(event,parent1);
} catch (SQLException | IOException | MessagingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public String getUser() {
return username;
}
这里的问题是我没有直接从ResetPasswordPage转到NewPasswordPage,而是有一个中间页面(CodeVerificationPage),因此,如果我在ResetPasswordPage中设置此字段,则该字段将无效,因为NewPasswordPage场景是从CodeVerificationPage(中间页)。