javafx - 尝试使用 FXML 文件进行编译时，JavaFX 程序不起作用
问题描述
所以最近几天我在学习https://www.youtube.com/watch?v=FLkOX4Eez6o&list=PL6gx4Cwl9DGBzfXLWLSYVy8EbTdpGbUIG的教程时深入研究了 JavaFX 。现在我的问题是，我无法运行其中包含 .fxml 文件的项目。我的代码：主要：
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class Main extends Application {
@Override
public void start(Stage primaryStage) throws Exception{
Parent root = FXMLLoader.load(getClass().getResource("/main.fxml"));
primaryStage.setTitle("Hello World");
primaryStage.setScene(new Scene(root, 300, 275));
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
控制器：
package main.java.research;
import javafx.scene.control.Button;
public class Controller {
public void handleButtonClick(){
System.out.println("Run code in console");
}
}
FXML 文件：
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<VBox prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8"xmlns:fx="http://javafx.com/fxml"
fx:controller="main.java.research.Controller">
<Label text="I love bacon"/>
<Button text="Submit"/>
</VBox>
错误信息：
"C:\Program Files\Java\jdk-13.0.2\bin\java.exe" -p C:\JavaFX\javafx-sdk-14\lib --add-modules javafx.controls,javafx.fxml --add-modules javafx.base,javafx.graphics --add-reads javafx.base=ALL-UNNAMED --add-reads javafx.graphics=ALL-UNNAMED "-javaagent:C:\Users\Standard\AppData\Local\JetBrains\IntelliJ IDEA Community Edition 2019.3.3\lib\idea_rt.jar=54742:C:\Users\Standard\AppData\Local\JetBrains\IntelliJ IDEA Community Edition 2019.3.3\bin" -Dfile.encoding=UTF-8 -classpath C:\Users\Standard\IdeaProjects\FXML-Shit\out\production\FXML-Shit;C:\JavaFX\javafx-sdk-14\lib\javafx-swt.jar;C:\JavaFX\javafx-sdk-14\lib\javafx.base.jar;C:\JavaFX\javafx-sdk-14\lib\javafx.controls.jar;C:\JavaFX\javafx-sdk-14\lib\javafx.fxml.jar;C:\JavaFX\javafx-sdk-14\lib\javafx.graphics.jar;C:\JavaFX\javafx-sdk-14\lib\javafx.media.jar;C:\JavaFX\javafx-sdk-14\lib\javafx.swing.jar;C:\JavaFX\javafx-sdk-14\lib\javafx.web.jar main.java.research.Main
Exception in Application start method
java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:464)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:363)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at java.base/sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:1051)
Caused by: java.lang.RuntimeException: Exception in Application start method
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:900)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication$2(LauncherImpl.java:195)
at java.base/java.lang.Thread.run(Thread.java:830)
Caused by: javafx.fxml.LoadException:
/C:/Users/Standard/IdeaProjects/FXML-Shit/out/production/FXML-Shit/main.fxml
at javafx.fxml/javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2625)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2568)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2466)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3237)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3194)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3163)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3136)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3113)
at javafx.fxml/javafx.fxml.FXMLLoader.load(FXMLLoader.java:3106)
at main.java.research.Main.start(Main.java:13)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$9(LauncherImpl.java:846)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runAndWait$12(PlatformImpl.java:455)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:391)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
at javafx.graphics/com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
at javafx.graphics/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
... 1 more
Caused by: javax.xml.stream.XMLStreamException: ParseError at [row,col]:[2,6]
Message: The processing instruction target matching "[xX][mM][lL]" is not allowed.
at java.xml/com.sun.org.apache.xerces.internal.impl.XMLStreamReaderImpl.next(XMLStreamReaderImpl.java:652)
at java.xml/javax.xml.stream.util.StreamReaderDelegate.next(StreamReaderDelegate.java:84)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2538)
... 17 more
Exception running application main.java.research.Main
结构： https ://imgur.com/a/PCBSgms
我研究了这个问题并偶然发现了一个有类似问题的线程（JavaFX InvocationTargetException）。我在我的项目中使用了该解决方案，但仍然遇到了以前遇到的问题。现在我需要一些关于如何解决这个问题的新想法，因为我不知道该怎么做。我使用 InteliJ Community Edition 和 JavaFX 14。我不排除安装错误。
您对如何解决它有任何想法吗？