如何在JavaFX中从主窗口调用弹出窗口？

Question

1. main.java--（src/sample文件夹）
2. studentcontroller.java--（src/sample/controller文件夹）
3. studentdao.java和sexdao.java（数据访问对象）--（src/sample/model文件夹）
4. Student.java（公共类学生和构造器）--（src/sample/model文件夹）
5. oddbc的util下的dbutil--（src/sample/util文件夹）
6. 用场景生成器创建的FXML文件--（src/sample/view文件夹）

   1. rootlayout.fxml
   2. studentview.fxml（主窗口）
   3. genderpopup.fxml（带有TableView显示记录的弹出窗口）

   Main.java

   package sample;
   
   import javafx.application.Application;
   import javafx.fxml.FXMLLoader;
   import javafx.scene.Scene;
   import javafx.scene.layout.AnchorPane;
   import javafx.scene.layout.BorderPane;
   import javafx.stage.Stage;
   import java.io.IOException;
   
   public class Main extends Application {
   private Stage primaryStage;
   private BorderPane rootLayout;
   
   @Override
   public void start(Stage primaryStage) {
       this.primaryStage = primaryStage;
       this.primaryStage.setTitle("Sample JavaFX App");
       initRootLayout(); // Initialize RootLayout
       showStudentView();
   }
   
   //Initializes the root layout.
   public void initRootLayout() {
       try {
           FXMLLoader loader = new FXMLLoader();
          loader.setLocation(Main.class.getResource("view/RootLayout.fxml"));
           rootLayout = (BorderPane) loader.load();
           Scene scene = new Scene(rootLayout);
           primaryStage.setScene(scene);
           primaryStage.show(); //Display the primary stage
       } catch (IOException e) {
           e.printStackTrace();
       }
   }
   
   //Shows the Patient inside the root layout.
   public void showStudentView() {
       try {
         FXMLLoader loader = new FXMLLoader();
         loader.setLocation(Main.class.getResource("view/StudentView.fxml"));
         AnchorPane PatientView = (AnchorPane) loader.load();
         rootLayout.setCenter(PatientView);
       } catch (IOException e) {
           e.printStackTrace();
       }
   }
   
   public static void main(String[] args) {
           launch(args);
       }
   }
   

   StudentController.java

   package sample.controller;
   import javafx.fxml.FXML;
   import javafx.fxml.FXMLLoader;
   import javafx.scene.Parent;
   import javafx.scene.Scene;
   import javafx.stage.Stage;
   
   public class StudentController {
       @FXML private TextField studentIdText;
       @FXML private TextField lastNameText;
       @FXML private TextField firstNameText;
       @FXML private TextField sexText;
       @FXML private Button popupButton;
   
       @FXML
       private void initialize () {
   // I have additional listeners here doing different things that I have excluded which do pretty much similar things as shown below
       sexText.focusedProperty().addListener((arg0, oldPropertyValue, newPropertyValue) -> {
           if (!newPropertyValue) {
               try {
                   searchSexDescription();
               } catch (ClassNotFoundException e) {
                   e.printStackTrace();
               } catch (SQLException e) {
                   e.printStackTrace();
               }
           }
       });
   }
   
   // Function to Search Sex Description
   @FXML
   private void searchSexDescription() throws ClassNotFoundException, SQLException {
       try {
           if (!sexText.getText().isEmpty()) {
               // Get Gender Description
               Patient sex = SexDAO.searchSex(sexText.getText());
               populateAndShowSexDescription(sex);
           }
       } catch (SQLException e) {
           System.out.println("Exception raised in searchSexDescription");
           e.printStackTrace();
           throw e;
       }
   }
   
   @FXML
   public void showGenderPopup() throws IOException {
       try {
           FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("view/GenderPopup.fxml"));
           Parent root = (Parent) fxmlLoader.load();
           Scene scene = new Scene(root);
           Stage stage = new Stage();
           stage.setScene(scene);
           stage.show();
   } catch (IOException e) {
       e.printStackTrace();
     }
   }
   

Answer 1

你的道路不正确。您试图从StudentController类而不是Main类获取FXML资源。正如您所提到的，您的项目结构包括：

• /sample/main.java
• /sample/controller/studentcontroller.java
• /sample/view/genderpopup.fxml

由于您在StudentController内调用getClass().getResource(...)，所以没有前导/的路径相对于StudentController的位置。这意味着路径最终解析为：

• /sample/controller/view/genderpopup.fxml

根本不存在。

如果使用StudentController.class查询资源，则需要使用/sample/view/genderpopup.fxml作为路径。