我将 Spring JPA 与 OpenJFX 结合使用。就是这个项目JavaFX-weaver ,只需在 pom 中添加 spring-boot-start-data-jpa。
但是我的 Spring JPA 启动时间是 15-20 秒,直到 spring 初始化后,UI 才会显示。当用户启动应用程序时,每次都会花费很多时间!
作为解决方法,我尝试创建一个没有 Spring 的简单 java fx 应用程序(使用此演示 here),然后在主要方法中从 spring 中的主要方法开始一个按钮(参见下面的示例)。这将启动 spring,但不会加载依赖项和属性。
你知道练习那个案例的好方法吗?欢迎任何帮助。
谢谢
AppBootstrap(Java + OpenJFX)
public class AppBootstrap extends Application {
@Override
public void start(Stage primaryStage) {
Button btn = new Button();
// start spring jpa main method
btn.setOnAction(event -> App.main(new String[]{""}));
StackPane root = new StackPane();
root.getChildren().add(btn);
primaryStage.setScene(new Scene(root, 300, 250));
primaryStage.show();
}
public static void main(String[] args) {
launch();
}
}
应用程序(Spring JPA + javafx-weaver)
@SpringBootApplication
public class App {
public static void main(String[] args) {
Application.launch(SpringbootJavaFxApplication.class, args);
}
}
最佳答案
启动 JPA 驱动的应用程序会增加 ApplicationContext 的加载时间。虽然您可以通过不检查或创建数据库方案来加快速度,例如通过设置 hibernate.hbm2ddl.auto=none
,这不是最佳选择。
根据设计,主要阶段在 ApplicationContext 加载后显示,因为它应该能够被依赖注入(inject)。
我推荐的最佳做法是在加载 ApplicationContext 时使用启动画面。这有点棘手,因为您有单独的线程,但大致如下所示:
创建启动窗口
public class Splash {
private static final int SPLASH_WIDTH = 200;
private static final int SPLASH_HEIGHT = 200;
private final Parent parent;
private final Stage stage;
public Splash() {
this.stage = new Stage();
stage.setWidth(SPLASH_WIDTH);
stage.setHeight(SPLASH_HEIGHT);
Label progressText = new Label("Application loading ...");
VBox splashLayout = new VBox();
splashLayout.setAlignment(Pos.CENTER);
splashLayout.getChildren().addAll(progressText);
progressText.setAlignment(Pos.CENTER);
splashLayout.setStyle(
"-fx-padding: 5; " +
"-fx-background-color: white; " +
"-fx-border-width:5; " +
"-fx-border-color: white;"
);
splashLayout.setEffect(new DropShadow());
this.parent = splashLayout;
}
public void show() {
Scene splashScene = new Scene(parent);
stage.initStyle(StageStyle.UNDECORATED);
final Rectangle2D bounds = Screen.getPrimary().getBounds();
stage.setScene(splashScene);
stage.setX(bounds.getMinX() + bounds.getWidth() / 2 - SPLASH_WIDTH / 2.0);
stage.setY(bounds.getMinY() + bounds.getHeight() / 2 - SPLASH_HEIGHT / 2.0);
stage.show();
}
public void hide() {
stage.toFront();
FadeTransition fadeSplash = new FadeTransition(Duration.seconds(0.3), parent);
fadeSplash.setFromValue(1.0);
fadeSplash.setToValue(0.0);
fadeSplash.setOnFinished(actionEvent -> stage.hide());
fadeSplash.play();
}
}
初始化应用
public class SpringbootJavaFxApplication extends Application {
private ConfigurableApplicationContext context;
class ApplicationContextLoader extends Task<Void> {
private final Stage primaryStage;
ApplicationContextLoader(Stage primaryStage) {
this.primaryStage = primaryStage;
}
@Override
protected Void call() {
ApplicationContextInitializer<GenericApplicationContext> initializer =
context -> {
context.registerBean(Application.class, () -> SpringbootJavaFxApplication.this);
context.registerBean(Stage.class, () -> primaryStage);
context.registerBean(Parameters.class,
SpringbootJavaFxApplication.this::getParameters); // for demonstration, not really needed
};
SpringbootJavaFxApplication.this.context = new SpringApplicationBuilder()
.sources(JavaFxSpringbootDemo.class)
.initializers(initializer)
.run(getParameters().getRaw().toArray(new String[0]));
return null;
}
}
@Override
public void start(Stage primaryStage) {
var splash = new Splash();
splash.show();
final ApplicationContextLoader applicationContextLoader = new ApplicationContextLoader(primaryStage);
applicationContextLoader.stateProperty().addListener((observableValue, oldState, newState) -> {
if (newState == Worker.State.SUCCEEDED) {
context.publishEvent(new StageReadyEvent(primaryStage));
splash.hide();
}
});
new Thread(applicationContextLoader).start();
}
@Override
public void stop() {
this.context.close();
Platform.exit();
}
}
关于带有java FX的Spring数据jpa,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/61274423/