java - Maven 构建后某些场景未加载

Question

我正在 netbeans 中开发 JavaFx 应用程序，在 netbeans 中，该项目正在构建并运行良好。

我从我的项目中创建了一个构建(mvn 包)，它没有错误地完成但是当我启动程序时它没有加载所有场景并且 FXMLLoader 在这种情况下返回空值。

同一文件夹中的所有 .fxml 文件。

public class JavaFXApplication extends Application {

    public static final String TOOLBAR_MAIN = "toolbarMain";
    public static final String TOOLBAR_MAIN_FXML = "/fxml/ToolbarMain.fxml";
    public static final String TOOLBAR_SUB = "toolbarSub";
    public static final String TOOLBAR_SUB_FXML = "/fxml/ToolbarSub.fxml";

    public static final String NEW_SESSION_PANEL = "newSession";
    public static final String NEW_SESSION_PANEL_FXML = "/fxml/NewSessionPanel.fxml";
    public static final String OPEN_SESSION_PANEL = "openSession";
    public static final String OPEN_SESSION_PANEL_FXML = "/fxml/OpenSessionPanel.fxml";
    public static final String CONNECTIONS_PANEL = "connections";
    public static final String CONNECTIONS_PANEL_FXML = "/fxml/ConnectionsPanel.fxml";
    public static final String LOGS_PANEL = "logs";
    public static final String LOGS_PANEL_FXML = "/fxml/LogsPanel.fxml";
    public static final String EXCEPTIONS_PANEL = "exceptions";
    public static final String EXCEPTIONS_PANEL_FXML = "/fxml/ExceptionsPanel.fxml";
    public static final String MESSAGES_PANEL = "messages";
    public static final String MESSAGES_PANEL_FXML = "/fxml/MessagesPanel.fxml";

    public static ScreensController menuContainer = new ScreensController();
    public static ScreensController contentContainer = new ScreensController();

    public static ServerService server = new ServerService();

    public static Stage STAGE;

    @Override
    public void start(Stage primaryStage) throws Exception {

        STAGE = primaryStage;

        primaryStage.setOnCloseRequest((WindowEvent t) -> {
            if (server.isRunning()) {
                server.cancel();
            }
        });

        menuContainer.loadScreen(JavaFXApplication.TOOLBAR_MAIN,
                JavaFXApplication.TOOLBAR_MAIN_FXML);
        menuContainer.loadScreen(JavaFXApplication.TOOLBAR_SUB,
                JavaFXApplication.TOOLBAR_SUB_FXML);

        contentContainer.loadScreen(JavaFXApplication.NEW_SESSION_PANEL,
                JavaFXApplication.NEW_SESSION_PANEL_FXML);
        contentContainer.loadScreen(JavaFXApplication.OPEN_SESSION_PANEL,
                JavaFXApplication.OPEN_SESSION_PANEL_FXML);
        contentContainer.loadScreen(JavaFXApplication.NEW_SESSION_PANEL,
                JavaFXApplication.NEW_SESSION_PANEL_FXML);
        contentContainer.loadScreen(JavaFXApplication.CONNECTIONS_PANEL,
                JavaFXApplication.CONNECTIONS_PANEL_FXML);
        contentContainer.loadScreen(JavaFXApplication.LOGS_PANEL,
                JavaFXApplication.LOGS_PANEL_FXML);
        contentContainer.loadScreen(JavaFXApplication.EXCEPTIONS_PANEL,
                JavaFXApplication.EXCEPTIONS_PANEL_FXML);
        contentContainer.loadScreen(JavaFXApplication.MESSAGES_PANEL,
                JavaFXApplication.MESSAGES_PANEL_FXML);
        menuContainer.setScreen(JavaFXApplication.TOOLBAR_MAIN);
        contentContainer.setScreen(JavaFXApplication.NEW_SESSION_PANEL);

        SplitPane root = new SplitPane();

        root.getItems().addAll(menuContainer, contentContainer);
        Scene scene = new Scene(root);
        primaryStage.setScene(scene);
        primaryStage.show();
        primaryStage.setResizable(false);
        primaryStage.setTitle("Exam Supervisor");

    }

加载屏幕的屏幕 Controller :

public class ScreensController extends StackPane {

    private HashMap<String, Node> screens = new HashMap<>();

    public void addScreen(String name, Node screen) {
        screens.put(name, screen);
    }

    public boolean loadScreen(String name, String resource) {
        try {
            FXMLLoader myLoader = new FXMLLoader(getClass().getResource(resource));
            System.out.println("name:" + name + " ,resource" + resource + " ,loader:" + myLoader.getLocation());
            Parent loadScreen = myLoader.load();
            ControlledScreen myScreenControler
                    = myLoader.getController();
            myScreenControler.setScreenParent(this);
            addScreen(name, loadScreen);
            return true;
        } catch (Exception e) {
            System.out.println("name: " + name + ", resource" + resource + " ,exception: " + e.getMessage());
            return false;
        }
    }

    public boolean setScreen(final String name) {

        if (screens.get(name) != null) {
            final DoubleProperty opacity = opacityProperty();

            if (!getChildren().isEmpty()) {
                getChildren().remove(0);
                getChildren().add(0, screens.get(name));
            } else {
                getChildren().add(screens.get(name));
            }
            return true;
        } else {
            System.out.println(screens.get(name) + " ,screen hasn't been loaded!\n");
            return false;
        }

    }

    public boolean unloadScreen(String name) {
        if (screens.remove(name) == null) {
            System.out.println("Screen didn't exist");
            return false;
        } else {
            return true;
        }
    }
}

我的 github 存储库:https://github.com/eszikk/ExamSuperVisorServer

Answer 1

我查看了您的 netbeans 项目文件和 maven pom，没有发现任何异常。两种配置的类路径中均未包含 javafx 库这一事实告诉我，您正在从 Java 安装中使用它。

也许您在启动 maven 目标时使用了与 netbeans 不同的 Java 安装。然后，fxml 模块可能会丢失，或者第二次安装时没有安装 java fx，或者其他不兼容的东西。

您是否从控制台启动了 Maven 目标？例如

java -jar xyz.jar

尝试

java -version

并将该版本与 netbeans 使用的 java 版本进行比较(帮助 > 关于)。

Netbeans 构建由内部 Maven 版本完成。但也有可能外部 Maven 构建使用与内部 netbeans 构建不同版本的 java 编译器。

希望对您有所帮助!