java - JavaFX 中的 "automatic injection of location and resources properties into the controller"是什么？

Question

在Initializable的描述中据说界面:

NOTE This interface has been superseded by automatic injection of location and resources properties into the controller. FXMLLoader will now automatically call any suitably annotated no-arg initialize() method defined by the controller. It is recommended that the injection approach be used whenever possible.

问题是:如何“合适地注释”方法？我只找到一个注解——@FXML。还有其他的吗？

Answer 1

答案是located here :

In JavaFX 2.1 and earlier, controller classes were required to implement the Initializable interface to be notified when the contents of the associated FXML document had been completely loaded. In JavaFX 2.2, this is no longer necessary. An instance of the FXMLLoader class simply looks for the initialize() method on the controller and calls it, if available. Note that, similar to other FXML callback methods such as event handlers, this method must be annotated with the @FXML annotation if it is not public.

It is recommended that developers use this approach for new development. The Initializable interface has not been deprecated, but might be in a future release.

编辑

经过更多研究，我现在可以提供一个 SSCCE，演示如何将资源包注入(inject)带有注释的 Controller 中。请注意，此 SSCCE 包含对 this SO question 的答案的细微修改。 .

这是 SSCCE:

com/stackexchange/stackoverflow/_20107463/MyController.java:

package com.stackexchange.stackoverflow._20107463;

import java.util.ResourceBundle;
import javafx.fxml.FXML;
import javafx.scene.control.Label;

public class MyController {

  @FXML 
  private Label label;

  @FXML private ResourceBundle resources;

  @FXML
  private void initialize() {
    label.setText(resources.getString("key1"));
  }

  // Or if you don't want to use @FXML you could do:
  //public void initialize() {
  //  label.setText(resources.getString("key1"));
  //}
}

com/stackexchange/stackoverflow/_20107463/MyView.fxml:

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

<?import javafx.scene.layout.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.*?>

<BorderPane fx:controller="com.stackexchange.stackoverflow._20107463.MyController" xmlns:fx="http://javafx.com/fxml">
  <top>
    <!-- This label's text will be set by the controller -->
    <Label fx:id="label"/>
  </top>
  <center>
    <!-- This label's text will be taken from the bundle automatically -->
    <Label text="%key2"/>
  </center>
</BorderPane>

com/stackexchange/stackoverflow/_20107463/BundleDemo.java:

package com.stackexchange.stackoverflow._20107463;

import java.io.IOException;
import java.util.Locale;
import java.util.ResourceBundle;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.fxml.FXMLLoader;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBoxBuilder;
import javafx.scene.layout.Pane;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class BundleDemo extends Application {

  private Stage stage;

  @Override
  public void start(Stage primaryStage) {
    stage = primaryStage;
    Button btnEN = new Button();
    btnEN.setText("English");
    btnEN.setOnAction(new EventHandler<ActionEvent>() {
      @Override public void handle(ActionEvent event) {
        loadView(new Locale("en", "EN"));
      }
    });

    Button btnKG = new Button();
    btnKG.setText("Español");
    btnKG.setOnAction(new EventHandler<ActionEvent>() {
      @Override public void handle(ActionEvent event) {
        loadView(new Locale("es", "ES"));
      }
    });

    VBox root = new VBox(20);
    root.getChildren().add(HBoxBuilder.create().spacing(10).style("-fx-background-color: gray").padding(new Insets(5)).children(btnEN, btnKG).build());
    root.getChildren().add(new StackPane());
    primaryStage.setScene(new Scene(root, 300, 250));
    primaryStage.show();
  }

  private void loadView(Locale locale) {
    try {
      FXMLLoader fxmlLoader = new FXMLLoader();

      fxmlLoader.setResources(ResourceBundle.getBundle("com.stackexchange.stackoverflow.bundles.MyBundle", locale));
      Pane pane = (BorderPane) fxmlLoader.load(this.getClass().getResource("MyView.fxml").openStream());
      // replace the content
      StackPane content = (StackPane) ((VBox) stage.getScene().getRoot()).getChildren().get(1);
      content.getChildren().clear();
      content.getChildren().add(pane);
    } catch (IOException ex) {
      ex.printStackTrace();
    }
  }

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

com/stackexchange/stackoverflow/_20107463/MyBundle_en.properties:

key1=Name Surname
key2=How are you?

com/stackexchange/stackoverflow/_20107463/MyBundle_es.properties:

key1=Apellido
key2=Que tal?