java.lang.reflect.InvocationTargetException使用Button在BorderPane中打开FXML文件时

Question

我对JavaFX教程中的项目有一点问题，我有三个FXML文件，其中一个“ Main”包含边框窗格，第二个包含Toggle Buttons和Button，我想使用Button在Main Central中打开第三个FXML文件边框窗格，但是当我尝试单击按钮时发生错误。

这是我的代码

@FXML
private BorderPane mainBorderPane;

@FXML
private ToggleButtonLibriaryController toggleButtonLibriaryController;

@FXML
public void initialize() {
    toggleButtonLibriaryController.setMainController(this);
}


public void setCenter() throws IOException {
    FXMLLoader loader = new FXMLLoader();
    loader.setLocation(getClass().getResource("addBookMenu.fxml"));
    Pane pane = loader.load();
    mainBorderPane.setCenter(pane);

}

还有按钮控制器

private MainController mainController;


@FXML
private ToggleGroup ToggleLibriary;

@FXML
private HBox ToggleButtonLibriary = new HBox();

@FXML
public void OpenLibriary() {
    System.out.println("biblioteka");

@FXML
private Button addBookButton = new Button();

@FXML
private ToggleButton LibriaryToggleButton = new ToggleButton();

@FXML
private ToggleButton BookListToogleButton = new ToggleButton();

@FXML
private ToggleButton StatisticToogleButton = new ToggleButton();

@FXML
public void OpenBookList() {
    System.out.println("ksiazki");
}

@FXML
public void OpenStatics() {
    System.out.println("Statystyka");
}

public void setMainController(MainController mainController) {
    this.mainController = mainController;
}

@FXML
public void addBook() throws IOException{
    if (ToggleLibriary.getSelectedToggle() != null) {
        ToggleLibriary.getSelectedToggle().setSelected(false);
    }
    mainController.setCenter();
}

我将非常感谢您的帮助

我的FXML文件

    <BorderPane fx:id="mainBorderPane" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" pickOnBounds="false" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/10.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="Controller.MainController."> <top>
  <VBox BorderPane.alignment="CENTER">
  <fx:include fx:id="toggleButtonLibriary" source="ToggleButtonLibriary.fxml" />
  </VBox>

还有我的第二名

  <HBox fx:id="ToggleButtonLibriary" spacing="10.0" xmlns="http://javafx.com/javafx/10.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="Controller.ToggleButtonLibriaryController">
        <children>
            <ToggleButton fx:id="LibriaryToggleButton" mnemonicParsing="false" onAction="#OpenLibriary" prefHeight="60.0" prefWidth="130.0" text="%library">
                <toggleGroup>
                    <ToggleGroup fx:id="ToggleLibriary" />
                </toggleGroup>
            </ToggleButton>
            <ToggleButton fx:id="BookListToogleButton" mnemonicParsing="false" onAction="#OpenBookList" prefHeight="60.0" prefWidth="130.0" text="%list.books" toggleGroup="$ToggleLibriary" />
            <ToggleButton fx:id="StatisticToogleButton" mnemonicParsing="false" onAction="#OpenStatics" prefHeight="60.0" prefWidth="130.0" text="%stats" toggleGroup="$ToggleLibriary" />
  <Button fx:id="addBookButton" mnemonicParsing="false" onAction="#addBook" prefHeight="60.0" prefWidth="130.0" text="%add_book">
     <graphic>
        <ImageView fitHeight="34.0" fitWidth="41.0" pickOnBounds="true" preserveRatio="true">
           <image>
              <Image url="@../resources/Icons/indeks.png" />
           </image>
        </ImageView>
     </graphic>
  </Button>
        </children>
        <padding>
            <Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
        </padding>
    </HBox>