javafx.fxml.FXMLLoader.constructLoadException | fxml.LoadException

Question

控制器：

package sample;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.URL;
import java.util.ResourceBundle;
import java.util.Scanner;

import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Node;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.Pane;
import javafx.scene.layout.Region;
import javafx.stage.Stage;

public class Controller {

    @FXML
    private ResourceBundle resources;

    @FXML
    private URL location;

    @FXML
    private Button studentSignInBut;

    @FXML
    private TextField logiinText;

    @FXML
    private PasswordField passText;

    @FXML
    private Button signInBut;

    @FXML
    void e4bbbb(ActionEvent event) {

    }



    @FXML
    void initialize() {
        studentSignInBut.setOnAction(e -> {
                try {
                    Parent parent = FXMLLoader.load(getClass().getResource("studSet.fxml"));
                    Scene scene = new Scene(parent);
                    Stage stage = (Stage)((Node)e.getSource()).getScene().getWindow();
                    stage.setScene(scene);
                    stage.show();
                    stage.setResizable(false);
                } catch (Exception ex) {
                    ex.printStackTrace();

                    String error = "";
                    StackTraceElement[] list = ex.getStackTrace();
                    for (StackTraceElement i : list) {
                        error+=i.toString()+"\n";
                    }
                    Pane p = new Pane();
                    p.getChildren().add(new TextArea(error));
                    ScrollPane sp = new ScrollPane(p);
                    Stage st = new Stage();
                    Scene sc = new Scene(sp);
                    st.setScene(sc);
                    st.show();

                    Alert errorAlert = new Alert(Alert.AlertType.ERROR);
                    errorAlert.setHeaderText(ex.getClass().getName());
                    errorAlert.setContentText("To String: "+ex.toString()+"\n"+error
                    );
                    errorAlert.getDialogPane().setPrefWidth(1000.0);
                    errorAlert.showAndWait();
                }
        });
        signInBut.setOnAction(e -> {
            String login = logiinText.getText();
            String pass = passText.getText();
            File file = new File("src\\info\\AdminPassword.txt");
            try {
                Scanner sc = new Scanner(file);
                String pas = null;
                if (sc.hasNext()) {
                    String log = sc.next();
                    pas = sc.next();

                    if (login.equals(log) && pass.equals(pas)) {
                        System.out.println("Admin");


                        Parent parent = FXMLLoader.load(getClass().getResource("app.fxml"));
                        Scene scene = new Scene(parent);
                        Stage stage = (Stage) ((Node) e.getSource()).getScene().getWindow();
                        stage.setScene(scene);
                        stage.show();
                        stage.setResizable(false);

                    }
                }
            } catch (Exception ex) {
                ex.printStackTrace();
                File currentDirectory = new File("");
//                File cur = new File(Controller.class.getProtectionDomain().getCodeSource().getLocation()
//                        .toURI()).getPath();
//                System.out.println(currentDirectory.getCanonicalPath());
//                System.out.println(currentDirectory.getAbsolutePath());
                Alert errorAlert = new Alert(Alert.AlertType.ERROR);
                errorAlert.setHeaderText(ex.getClass().getName());
                errorAlert.setContentText("To String: "+ex.toString()+"\nMessage: "+ex.getMessage()+"\nCause: "+ex.getCause()+"\nStackTrace: "
                        +ex.getStackTrace()+"\n\n\n"+System.getProperty("user.dir")+"\n\n\n"+currentDirectory.getAbsolutePath());
                errorAlert.showAndWait();
            }


        });
    }
}

studSet.fxml：

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

<?import javafx.scene.text.*?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.layout.GridPane?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>

<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="700.0" style="-fx-background-color: #2e3348;" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.studSetController">
    <children>
        <AnchorPane layoutY="109.0" prefHeight="291.0" prefWidth="700.0" style="-fx-background-color: #fafafa;">
         <children>
            <TextField fx:id="studName" layoutX="14.0" layoutY="14.0" prefHeight="35.0" prefWidth="303.0" promptText="Имя" />
            <TextField fx:id="studSurname" layoutX="14.0" layoutY="55.0" prefHeight="35.0" prefWidth="303.0" promptText="Фамилия" />
            <ComboBox fx:id="subjectName" layoutX="14.0" layoutY="98.0" prefHeight="25.0" prefWidth="303.0" promptText="Предмет" style="-fx-background-color: orange;" visibleRowCount="5" />
            <ComboBox fx:id="numOfQuestions" layoutX="14.0" layoutY="135.0" prefHeight="25.0" prefWidth="303.0" promptText="Колличество вопросов" style="-fx-background-color: orange;" visibleRowCount="5" />
            <ListView fx:id="subjectList" layoutX="331.0" layoutY="14.0" prefHeight="267.0" prefWidth="362.0" />
            <CheckBox fx:id="hintOnButton" layoutX="115.0" layoutY="181.0" mnemonicParsing="false" text="Подсказки" />
            <Button fx:id="backBut" layoutX="8.0" layoutY="248.0" mnemonicParsing="false" style="-fx-background-color: orange;" text="Назад" textFill="WHITE">
               <font>
                  <Font name="Comic Sans MS" size="16.0" />
               </font>
            </Button>
         </children>
        </AnchorPane>
        <Label layoutX="212.0" layoutY="14.0" text="Настройка" textFill="WHITE">
            <font>
                <Font name="Comic Sans MS" size="55.0" />
            </font>
        </Label>
      <Button fx:id="startBut" layoutX="571.0" layoutY="18.0" mnemonicParsing="false" style="-fx-background-color: orange;" text="Начать Тест" textFill="WHITE">
         <font>
            <Font name="Comic Sans MS" size="16.0" />
         </font>
      </Button>
    </children>
</AnchorPane>

错误：

javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2601)
javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2571)
javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3214)
javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175)
javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148)
javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124)
javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3104)
javafx.fxml.FXMLLoader.load(FXMLLoader.java:3097)
sample.Controller.lambda$initialize$0(Controller.java:53)
com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)
javafx.event.Event.fireEvent(Event.java:198)
javafx.scene.Node.fireEvent(Node.java:8411)
javafx.scene.control.Button.fire(Button.java:185)
com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:182)
com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:96)
com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:89)
com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
javafx.event.Event.fireEvent(Event.java:198)
javafx.scene.Scene$MouseHandler.process(Scene.java:3757)
javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:394)
com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:295)
java.security.AccessController.doPrivileged(Native Method)
com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$2(GlassViewEventHandler.java:432)
com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:410)
com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:431)
com.sun.glass.ui.View.handleMouseEvent(View.java:555)
com.sun.glass.ui.View.notifyMouse(View.java:937)
com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
com.sun.glass.ui.win.WinApplication.lambda$null$4(WinApplication.java:186)
java.lang.Thread.run(Unknown Source)

如果我们能解决这个问题，我将非常高兴。 Kinda很有趣，因为它可以在Intellij中编译而没有问题，但是当我将其编译为jar文件，然后尝试执行它时，它显示了这一点。而且我不知道在这里添加什么，如果您有任何问题，我可以回答。

Answer 1

控制器到目前为止看起来还不错。问题可能是fxml文件的加载方式（或文件有问题）。

您如何称呼您的场景？也许这可能工作：

FXMLLoader loadFrame = new FXMLLoader(YOURCLASS.class.getClassLoader().getResource("com/app/resources/Frame.fxml"));
            Parent mainRoot = loadFrame.load();