maven java.lang.IllegalAccessError:class com.sun.media.jfxmediaimpl.platform.PlatformManager

8tntrjer  于 2023-03-29  发布在  Maven
关注(0)|答案(1)|浏览(207)

我正在尝试用Java播放视频。我使用的代码来自this example
我在Windows 11上使用VS Code。
我使用Java: Create Java Project -> JavaFX Provided by Maven for Java从命令pallet创建了一个新项目。
我使用Maven for Java扩展来添加JavaFX Media依赖项,然后在www.example.com文件中添加requires javafx.media;module-info.java。
我能够得到javafx.media模块和相关的导入来解决,但在运行它时得到以下错误:

Exception in Application start method
java.lang.reflect.InvocationTargetException
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:119)
        at java.base/java.lang.reflect.Method.invoke(Method.java:578)
        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.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
        at java.base/java.lang.reflect.Method.invoke(Method.java:578)
        at java.base/sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:1081)
Caused by: java.lang.RuntimeException: Exception in Application start method
        at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:900)
        at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication$2(LauncherImpl.java:195)
        at java.base/java.lang.Thread.run(Thread.java:1589)
Caused by: java.lang.IllegalAccessError: class com.sun.media.jfxmediaimpl.platform.PlatformManager (in module javafx.media) cannot access class com.sun.javafx.PlatformUtil (in module javafx.base) because module javafx.base does not export com.sun.javafx to module javafx.media
        at javafx.media/com.sun.media.jfxmediaimpl.platform.PlatformManager.getSupportedProtocols(PlatformManager.java:203)
        at javafx.media/com.sun.media.jfxmediaimpl.NativeMediaManager.loadProtocols(NativeMediaManager.java:197)
        at javafx.media/com.sun.media.jfxmediaimpl.NativeMediaManager.canPlayProtocol(NativeMediaManager.java:267)
        at javafx.media/com.sun.media.jfxmedia.MediaManager.canPlayProtocol(MediaManager.java:78)
        at javafx.media/com.sun.media.jfxmedia.locator.Locator.<init>(Locator.java:239)
        at javafx.media/javafx.scene.media.Media.<init>(Media.java:393)
        at com.example/com.example.App.start(App.java:20)
        at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$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$10(PlatformImpl.java:428)
        at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
        at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$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
Exception running application com.example.App

module-info.java

module com.example {
    requires javafx.controls;
    requires javafx.fxml;
    requires javafx.media;

    opens com.example to javafx.fxml;
    exports com.example;
}

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.example</groupId>
    <artifactId>mediaplayer</artifactId>
    <version>1</version>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>11</maven.compiler.source>
        <maven.compiler.target>11</maven.compiler.target>
    </properties>
    <dependencies>

        <dependency>
            <groupId>org.jfxcore</groupId>
            <artifactId>javafx-media</artifactId>
            <version>18-ea+1</version>
        </dependency>

        <dependency>
            <groupId>org.openjfx</groupId>
            <artifactId>javafx-controls</artifactId>
            <version>13</version>
        </dependency>
        <dependency>
            <groupId>org.openjfx</groupId>
            <artifactId>javafx-fxml</artifactId>
            <version>13</version>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.0</version>
                <configuration>
                    <release>11</release>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.openjfx</groupId>
                <artifactId>javafx-maven-plugin</artifactId>
                <version>0.0.6</version>
                <executions>
                    <execution>
                        <!-- Default configuration for running -->
                        <!-- Usage: mvn clean javafx:run -->
                        <id>default-cli</id>
                        <configuration>
                            <mainClass>com.example.App</mainClass>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

App.java

package com.example;

import java.io.File;  
import javafx.application.Application;  
import javafx.scene.Group;  
import javafx.scene.Scene;  
import javafx.scene.media.Media;  
import javafx.scene.media.MediaPlayer;  
import javafx.scene.media.MediaView;  
import javafx.stage.Stage;

/**
 * JavaFX App
 */
public class App extends Application {
    @Override  
    public void start(Stage primaryStage) throws Exception {
        String path = "C:/Users/Justin/Videos/file_example_MP4_1920_18MG.mp4";

        Media media = new Media(new File(path).toURI().toString());  
          
        MediaPlayer mediaPlayer = new MediaPlayer(media);  
          
        MediaView mediaView = new MediaView(mediaPlayer);
          
        //by setting this property to true, the Video will be played   
        mediaPlayer.setAutoPlay(true);  
          
        //setting group and scene   
        Group root = new Group();  
        root.getChildren().add(mediaView);  
        Scene scene = new Scene(root,500,400);  
        primaryStage.setScene(scene);  
        primaryStage.setTitle("Playing video");  
        primaryStage.show();  
    }  
    public static void main(String[] args) {  
        launch(args);  
    }
}

我从一个相关的问题中看到了this answer,但它没有帮助,因为我已经做了建议的事情,除了在运行它时添加选项,因为我使用VS Code来运行它,而不是从命令行手动运行它。
有什么明显的地方我做错了吗?我需要做什么才能播放视频?

ruarlubt

ruarlubt1#

您的pom.xml具有

<groupId>org.jfxcore</groupId>
<artifactId>javafx-media</artifactId>

对于javafx.media依赖项。组ID应为org.openjfx

<groupId>org.openjfx</groupId>
<artifactId>javafx-media</artifactId>

同时确保所有JavaFX依赖项使用相同的版本。

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