java - 在 Spring 中创建自定义 FXML 加载器时出错

Question

我一直在尝试将我的 JavaFx 应用程序移动到 Spring 以利用依赖注入(inject)。该项目已经变得太大，无法在类之间手动移动项目。

该代码在我的 netbeans IDE 上没有显示任何红色错误突出显示，但当我运行时，我不断收到此错误:

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'homeController' defined in class wakiliproject.controllerinjection.SampleAppFactory: Instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public wakiliproject.controllerinjection.controllers.HomeController wakiliproject.controllerinjection.SampleAppFactory.homeController() throws java.io.IOException] threw exception; nested exception is javafx.fxml.LoadException: Base location is undefined.

我有这样的:

public class SampleApp extends Application {

    public static void main(String[] args) {
        launch(args);
    }

    public void start(Stage stage) throws Exception {
        AnnotationConfigApplicationContext context
                = new AnnotationConfigApplicationContext(SampleAppFactory.class);

        Group box = new Group();
        HomeController homeController = context.getBean(HomeController.class);
        box.getChildren().add(homeController.getView());

        Scene scene = new Scene(box, 600, 200);
        stage.setScene(scene);
        stage.setTitle("JFX2.0 Sprung");
        stage.show();
    }
}

--

@Configuration
public class SampleAppFactory {

    @Bean
    public HomeController homeController() throws IOException {
        return (HomeController) loadController("/resources/fxml/Home.fxml");
    }

    protected Object loadController(String url) throws IOException {
        InputStream fxmlStream = null;
        try {
            fxmlStream = getClass().getResourceAsStream(url);
            FXMLLoader loader = new FXMLLoader();
            loader.load(fxmlStream);
            return loader.getController();
        } finally {
            if (fxmlStream != null) {
                fxmlStream.close();
            }
        }
    }
}

--

public class HomeController {

    @FXML
    private AnchorPane view;

    public AnchorPane getView() {
        return view;
    }
}

FXML 文件的摘录如下所示:

<?xml version="1.0" encoding="UTF-8"?>

<AnchorPane fx:id="view" prefHeight="654.0" prefWidth="900.0" styleClass="AnchorPane" visible="true" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/2.2" fx:controller="wakiliproject.controllerinjection.controllers.HomeController">
    <children>
        <Pane id="wrapperPane" prefHeight="600.0" prefWidth="700.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
            <children>
                <Pane id="top" layoutX="-1.0" layoutY="3.0" prefWidth="879.0" styleClass="appNav" visible="true">
                    <children>
                        <HBox id="HBox" alignment="CENTER" layoutX="12.0" layoutY="6.0" spacing="0.0">
                            <children>
                                <Label prefHeight="32.0" prefWidth="32.0" styleClass="titleBarHome" />
                                <Label prefHeight="32.0" prefWidth="32.0" styleClass="titleBarPublisher" />
                            </children>
                        </HBox>

Answer 1

看来您需要在 FXMLLoader 上设置 FXML 文件的位置。例如，如果您的 FXML 文件需要解析相对位置，则可能会出现这种情况。使用 FXMLLoader.load(URL) 方法不会设置位置。尝试一下

protected Object loadController(String url) throws IOException {
    FXMLLoader loader = new FXMLLoader(getClass().getResource(url));
    loader.load();
    return loader.getController();
}

而不是您当前的实现。

顺便问一下，你看过afterburner.fx吗？作为 JavaFX 中依赖注入(inject)的 Spring 的(更轻量级的)替代品？