在 Java 8 中将控制器添加到 fxml 文件时出现 LoadException

Question

每次我将控制器添加到 fxml 文件时，都会出现异常：javafx.fxml.LoadException，当我打印异常消息时，它会显示文件的正确目录

我正在使用 netbeans 8 IDE、Java 8 和 GUI 的场景构建器

FXML:

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

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.ListView?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.Pane?>
<?import javafx.scene.text.Text?>

<AnchorPane id="AnchorPane" prefHeight="419.0" prefWidth="875.0" xmlns="http://javafx.com/javafx/8.0.171" xmlns:fx="http://javafx.com/fxml/1" fx:controller="organizer.Controller.DeleteCategoryController">
   <children>
      <Pane layoutX="9.0" layoutY="108.0" prefHeight="283.0" prefWidth="550.0" style="-fx-border-width: 1pt; -fx-border-color: black;">
         <children>
            <Text fx:id="textDeleteThen" layoutX="195.0" layoutY="27.0" strokeType="OUTSIDE" strokeWidth="0.0" text="Delete ... category then" />
            <Button layoutX="14.0" layoutY="166.0" mnemonicParsing="false" prefHeight="103.0" prefWidth="241.0" text="Option 3&#10;Create a new Relationship &#10;and move contacts having ..... &#10;relationship to this relationship" />
            <Button layoutX="266.0" layoutY="49.0" mnemonicParsing="false" prefHeight="103.0" prefWidth="241.0" text="Option 2&#10;Keep all contacts &#10;with the .... relationship" />
         </children></Pane>
      <Pane layoutX="569.0" layoutY="19.0" prefHeight="372.0" prefWidth="272.0" style="-fx-border-width: 1pt; -fx-border-color: black;" />
      <Text layoutX="41.0" layoutY="73.0" strokeType="OUTSIDE" strokeWidth="0.0" text="Choose one of the following options" wrappingWidth="447.681640625" />
      <Text fx:id="textDeletingCategory" layoutX="42.0" layoutY="24.0" strokeType="OUTSIDE" strokeWidth="0.0" text="Deleting ..." />
      <Text fx:id="textMessage" layoutX="42.0" layoutY="48.0" strokeType="OUTSIDE" strokeWidth="0.0" text="After deleting .... do the following:" />
      <Button alignment="CENTER" contentDisplay="CENTER" layoutX="279.0" layoutY="271.0" mnemonicParsing="false" prefHeight="103.0" prefWidth="241.0" text="Option 4&#10;Change Contacts having &#10;.... relationship &#10;to the following &#10;existing relationship" />
      <Button layoutX="23.0" layoutY="153.0" mnemonicParsing="false" prefHeight="103.0" prefWidth="241.0" text="Option 1&#10;Delete all contacts &#10;with the ..... relationship" />
      <TextField layoutX="585.0" layoutY="56.0" prefHeight="25.0" prefWidth="184.0" />
      <ListView fx:id="listViewRemainingCategories" layoutX="580.0" layoutY="138.0" prefHeight="236.0" prefWidth="241.0" />
      <Text layoutX="580.0" layoutY="115.0" strokeType="OUTSIDE" strokeWidth="0.0" text="List of other categories (for option 4)" />
      <Text layoutX="585.0" layoutY="39.0" strokeType="OUTSIDE" strokeWidth="0.0" text="New Category Name (for option 3)" />
   </children>
</AnchorPane>

和控制器：

package organizer.Controller;

import java.net.URL;
import java.util.ResourceBundle;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.ListView;
import javafx.scene.text.Text;
import organizer.Model.SQL_Objects;


public class DeleteCategoryController extends SQL_Objects implements Initializable{

    @FXML private ListView listViewRemainingCategories;
    @FXML private Text textDeletingCategory;
    @FXML private Text textMessage;
    @FXML private Text textDeleteThen;

    private int toRemoveId;
    private String toRemoveName;
    private int associatedRecordsCount;

    public DeleteCategoryController(String toRemoveName, int toRemoveId, int associatedRecordCount) {
        this.toRemoveName = toRemoveName;
        this.toRemoveId = toRemoveId;
        this.associatedRecordsCount = associatedRecordCount;
    }

    @Override
    public void initialize(URL location, ResourceBundle resources) {

    }

我程序中的所有其他 FXML 文件都运行良好，它只是这个 FXML 文件，无论我向其中添加哪个控制器，它都会阻止它加载，当我删除它正常打开的控制器属性时。

完整堆栈跟踪：

javafx.fxml.LoadException: 
file:/D:/Personal/Projects/Tools/Java/Organizer/dist/run798015614/Organizer.jar!/organizer/View/DeleteCategory.fxml:10

    at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2601)
    at javafx.fxml.FXMLLoader.access0(FXMLLoader.java:103)
    at javafx.fxml.FXMLLoader$ValueElement.processAttribute(FXMLLoader.java:932)
    at javafx.fxml.FXMLLoader$InstanceDeclarationElement.processAttribute(FXMLLoader.java:971)
    at javafx.fxml.FXMLLoader$Element.processStartElement(FXMLLoader.java:220)
    at javafx.fxml.FXMLLoader$ValueElement.processStartElement(FXMLLoader.java:744)
    at javafx.fxml.FXMLLoader.processStartElement(FXMLLoader.java:2707)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2527)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3214)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3104)
    at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3097)
    at organizer.Controller.Main.switchWindow(Main.java:32)
    at organizer.Controller.Main.start(Main.java:21)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication11(LauncherImpl.java:863)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait4(PlatformImpl.java:326)
    at com.sun.javafx.application.PlatformImpl.lambda$null2(PlatformImpl.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater3(PlatformImpl.java:294)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null7(WinApplication.java:177)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.InstantiationException: organizer.Controller.DeleteCategoryController
    at java.lang.Class.newInstance(Class.java:427)
    at sun.reflect.misc.ReflectUtil.newInstance(ReflectUtil.java:51)
    at javafx.fxml.FXMLLoader$ValueElement.processAttribute(FXMLLoader.java:927)
    ... 23 more
Caused by: java.lang.NoSuchMethodException: organizer.Controller.DeleteCategoryController.<init>()
    at java.lang.Class.getConstructor0(Class.java:3082)
    at java.lang.Class.newInstance(Class.java:412)
    ... 25 more

知道为什么吗？感谢您的帮助

Answer 1

所以我找到了解决方案，我将 post 放在这里，以便有人可以利用它当我删除程序运行的构造函数时，看起来在 JavaFx 应用程序中您只能拥有默认构造函数，但是如果您需要向构造函数添加参数，则需要使用所谓的 ControllerFactory。

在 Java 8 中将控制器添加到 fxml 文件时出现 LoadException

LoadException on adding a controller to fxml file in Java 8

java

model-view-controller

netbeans

javafx

scenebuilder