Spring应用程序上下文为null

  • Z时代
  • 2024-01-10
  • 分类：问答

我正在使用带有JavaFX的Spring Boot 1.3.3。应用程序以此成功启动启动屏幕（此时applicationContext不为null）

@SpringBootApplication
public class PirconApplication extends Application{
@Bean(name = "primaryStage")
public Stage getPrimaryStage() {
    return new Stage(StageStyle.DECORATED);
}
private ConfigurableApplicationContext applicationContext = null;
private static String[] args = null;
@Override
public void stop() throws Exception {
    super.stop();
    Platform.exit();
    applicationContext.close();
}
@Override
public void start(Stage primaryStage) throws Exception {
    Task<Object> worker = worker();
    worker.setOnSucceeded(new EventHandler<WorkerStateEvent>() {
        @Override
        public void handle(WorkerStateEvent event) {
            try {
                AppSplashController loader = applicationContext.getBean(AppSplashController.class);
                Stage stage = applicationContext.getBean(Stage.class);
                stage.setScene(loader.init());
                stage.initStyle(StageStyle.UNDECORATED);
                stage.show();
            } catch (IOException e) {
                    e.printStackTrace();
                    System.exit(0);
            }
        }
    });
    worker.setOnFailed(new EventHandler<WorkerStateEvent>() {
            @Override
            public void handle(WorkerStateEvent event) {
                    // TODO Auto-generated method stub
                    System.exit(0);
            }
    });
    worker.run();
}
public static void main(String[] args) {
    PirconApplication.args = args;
    launch(PirconApplication.class, args);
}
private Task<Object> worker() {
    return new Task<Object>() {
        @Override
        protected Object call() throws Exception {
                applicationContext = SpringApplication.run(PirconApplication.class, args);
                return null;
        }
    };
}
}

问题出在AppSplashController中，applicationContext和primaryStage bean全部为null。

@Component
public class AppSplashController implements BootInitializable {
@FXML
private ImageView imgLoading;
@FXML
private Text lblWelcome;
@FXML
private Text lblRudy;
@FXML
private VBox vboxBottom;
@FXML
private Label lblClose;
private Stage primaryStage;
private ApplicationContext springContainer;
/**
 * Initializes the controller class.
 */
@Override
public void initialize(URL url, ResourceBundle rb) {
    System.out.println("applicationContext: "+springContainer);
    System.out.println("primaryStage: "+primaryStage);
}
}
@Autowired
@Override
public void setPrimaryStage(Stage primaryStage) {
    this.primaryStage = primaryStage;
}
@Override
public Scene init() throws IOException {
    Parent root = FXMLLoader.load(getClass().getResource("/com/pircon/views/splash.fxml"));
    return new Scene(root);
}
@Override
public void setApplicationContext(ApplicationContext ac) throws BeansException {
    this.springContainer = ac;
}
}

BootInitializable接口

public interface BootInitializable extends Initializable, ApplicationContextAware {
    public Scene init() throws IOException; 
    public void setPrimaryStage(Stage primaryStage);
}

这是我Spring和Spring靴子的第一个项目，请原谅我的无知。

回答：

我认为您需要指定spring来设置这些bean的自动装配。例如

@Autowired
private ApplicationContext springContainer;

另一个建议是使用ApplicationContextProvider，它实现了Spring ApplicationContextAware接口。

public class ApplicationContextProvider implements ApplicationContextAware {
    private static ApplicationContext context;
    public static ApplicationContext getApplicationContext() {
        return context;
    }
    @Override
    public void setApplicationContext(ApplicationContext ctx) {
        context = ctx;
    }
}

您可以通过获取应用程序上下文 ApplicationContextProvider.getApplicationContext();

以上是 Spring应用程序上下文为null 的全部内容， 来源链接： utcz.com/qa/415719.html

回到顶部