由于 javaFx MediaPlayer，无法删除 .mp3 文件
Unable to delete .mp3 file due to javaFx MediaPlayer
我正在研究我的高中顶点。这是一个程序，用户可以在其中从 Internet 下载歌曲并以有组织的方式存储它们并播放它们。我的程序必须包含一项功能，用户只需按一下按钮即可删除指定的 .mp3 文件。我在 MediaPlayer 上尝试了 .dispose() 方法，然后尝试删除似乎不起作用的文件。它会产生一个错误，指出 .mp3 文件仍在使用中。我将如何阻止 Javafx 访问该文件？我在网上搜索了答案，但 none 的答案符合我的需要。如果有人可以为我提供一些代码来解决我的问题，将不胜感激！
下面是一个可重现的迷你示例！
JavaFxMp3WavPlayer
package mediaplayerjavafx;
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.nio.file.Files;
import java.nio.file.Paths;
import javafx.application.Application;
import javafx.event.Event;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import javafx.stage.Stage;
public class JavaFxMp3WavPlayer extends Application {
public static void main(String[] args) throws MalformedURLException, IOException {
launch(args);
}
@Override
public void start(Stage stage) throws Exception {
stage.setTitle("My");
Button button = new Button("Delete Song File!");
Scene scene = new Scene(button, 200, 100);
stage.setScene(scene);
stage.show();
File file = new File("C:\Users\John Doe\OneDrive\Desktop\YourLieInAprilTest\Mp3Test.mp3");
String path = file.toURI().toASCIIString();
Media media = new Media(path);
MediaPlayer mediaPlayer = new MediaPlayer(media);
button.setOnAction(new EventHandler() {
@Override
public void handle(Event arg0) {
deleteMusicFile(mediaPlayer);
}
});
mediaPlayer.play();
}
public void deleteMusicFile(MediaPlayer mediaPlayer) {
mediaPlayer.stop();
mediaPlayer.dispose();
try {
Files.delete(Paths.get("C:\Users\John Doe\OneDrive\Desktop\YourLieInAprilTest\Mp3Test.mp3"));
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
上面的class本质上是创建一个MediaPlayer对象并运行指定的.mp3文件。然后，当您按下按钮时，它将使用 .stop() 方法停止 MediaPlayer，然后使用 .dispose() 方法处理 MediaPlayer。然后它会尝试删除导致错误的文件。
模块信息
module MotisHarmony {
requires javafx.swt;
requires javafx.base;
requires javafx.controls;
requires javafx.fxml;
requires javafx.graphics;
requires javafx.media;
requires javafx.swing;
requires javafx.web;
exports mediaplayerjavafx;
opens mediaplayerjavafx to javafx.graphics;
}
产生错误
java.nio.file.FileSystemException: C:\Users\John Doe\OneDrive\Desktop\YourLieInAprilTest\Mp3Test.mp3: The process cannot access the file because it is being used by another process.
at java.base/sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:92)
at java.base/sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:103)
at java.base/sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:108)
at java.base/sun.nio.fs.WindowsFileSystemProvider.implDelete(WindowsFileSystemProvider.java:270)
at java.base/sun.nio.fs.AbstractFileSystemProvider.delete(AbstractFileSystemProvider.java:105)
at java.base/java.nio.file.Files.delete(Files.java:1141)
at MotisHarmony/mediaplayerjavafx.JavaFxMp3WavPlayer.deleteMusicFile(JavaFxMp3WavPlayer.java:53)
at MotisHarmony/mediaplayerjavafx.JavaFxMp3WavPlayer.handle(JavaFxMp3WavPlayer.java:43)
at javafx.base/com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at javafx.base/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:234)
at javafx.base/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at javafx.base/com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base/com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at javafx.base/com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)
at javafx.base/javafx.event.Event.fireEvent(Event.java:198)
at javafx.graphics/javafx.scene.Node.fireEvent(Node.java:8792)
at javafx.controls/javafx.scene.control.Button.fire(Button.java:203)
at javafx.controls/com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:208)
at javafx.controls/com.sun.javafx.scene.control.inputmap.InputMap.handle(InputMap.java:274)
at javafx.base/com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:247)
at javafx.base/com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
at javafx.base/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:234)
at javafx.base/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at javafx.base/com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base/com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at javafx.base/com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.base/javafx.event.Event.fireEvent(Event.java:198)
at javafx.graphics/javafx.scene.Scene$MouseHandler.process(Scene.java:3897)
at javafx.graphics/javafx.scene.Scene.processMouseEvent(Scene.java:1878)
at javafx.graphics/javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2623)
at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:411)
at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:301)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent(GlassViewEventHandler.java:450)
at javafx.graphics/com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:424)
at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:449)
at javafx.graphics/com.sun.glass.ui.View.handleMouseEvent(View.java:557)
at javafx.graphics/com.sun.glass.ui.View.notifyMouse(View.java:943)
at javafx.graphics/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop(WinApplication.java:184)
at java.base/java.lang.Thread.run(Thread.java:834)
附加信息
Link to the Mp3 file I used to test. https://drive.google.com/file/d/1CvAafbMviQ7nvKyojnem9GK73LJsD6MJ/view?usp=sharing
I am using JDK 11 and Javafx 17.0.2
System Type: 64-bit operating system, x64-based processor
Processor: Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz 2.81 GHz
Windows Edition: Windows 10 Home
感谢@Slaw 为我的问题提供了解决方案。为了解决我的问题，我创建了一个 deletionQueue ArrayList，它将保存我要删除的文件的路径。一旦在 MediaPlayer 上使用 .dispose() ，经过一定时间后，这些文件将被自动删除。
我正在研究我的高中顶点。这是一个程序，用户可以在其中从 Internet 下载歌曲并以有组织的方式存储它们并播放它们。我的程序必须包含一项功能，用户只需按一下按钮即可删除指定的 .mp3 文件。我在 MediaPlayer 上尝试了 .dispose() 方法，然后尝试删除似乎不起作用的文件。它会产生一个错误，指出 .mp3 文件仍在使用中。我将如何阻止 Javafx 访问该文件？我在网上搜索了答案，但 none 的答案符合我的需要。如果有人可以为我提供一些代码来解决我的问题，将不胜感激！ 下面是一个可重现的迷你示例！
JavaFxMp3WavPlayer
package mediaplayerjavafx;
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.nio.file.Files;
import java.nio.file.Paths;
import javafx.application.Application;
import javafx.event.Event;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import javafx.stage.Stage;
public class JavaFxMp3WavPlayer extends Application {
public static void main(String[] args) throws MalformedURLException, IOException {
launch(args);
}
@Override
public void start(Stage stage) throws Exception {
stage.setTitle("My");
Button button = new Button("Delete Song File!");
Scene scene = new Scene(button, 200, 100);
stage.setScene(scene);
stage.show();
File file = new File("C:\Users\John Doe\OneDrive\Desktop\YourLieInAprilTest\Mp3Test.mp3");
String path = file.toURI().toASCIIString();
Media media = new Media(path);
MediaPlayer mediaPlayer = new MediaPlayer(media);
button.setOnAction(new EventHandler() {
@Override
public void handle(Event arg0) {
deleteMusicFile(mediaPlayer);
}
});
mediaPlayer.play();
}
public void deleteMusicFile(MediaPlayer mediaPlayer) {
mediaPlayer.stop();
mediaPlayer.dispose();
try {
Files.delete(Paths.get("C:\Users\John Doe\OneDrive\Desktop\YourLieInAprilTest\Mp3Test.mp3"));
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
上面的class本质上是创建一个MediaPlayer对象并运行指定的.mp3文件。然后，当您按下按钮时，它将使用 .stop() 方法停止 MediaPlayer，然后使用 .dispose() 方法处理 MediaPlayer。然后它会尝试删除导致错误的文件。
模块信息
module MotisHarmony {
requires javafx.swt;
requires javafx.base;
requires javafx.controls;
requires javafx.fxml;
requires javafx.graphics;
requires javafx.media;
requires javafx.swing;
requires javafx.web;
exports mediaplayerjavafx;
opens mediaplayerjavafx to javafx.graphics;
}
产生错误
java.nio.file.FileSystemException: C:\Users\John Doe\OneDrive\Desktop\YourLieInAprilTest\Mp3Test.mp3: The process cannot access the file because it is being used by another process.
at java.base/sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:92)
at java.base/sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:103)
at java.base/sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:108)
at java.base/sun.nio.fs.WindowsFileSystemProvider.implDelete(WindowsFileSystemProvider.java:270)
at java.base/sun.nio.fs.AbstractFileSystemProvider.delete(AbstractFileSystemProvider.java:105)
at java.base/java.nio.file.Files.delete(Files.java:1141)
at MotisHarmony/mediaplayerjavafx.JavaFxMp3WavPlayer.deleteMusicFile(JavaFxMp3WavPlayer.java:53)
at MotisHarmony/mediaplayerjavafx.JavaFxMp3WavPlayer.handle(JavaFxMp3WavPlayer.java:43)
at javafx.base/com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at javafx.base/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:234)
at javafx.base/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at javafx.base/com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base/com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at javafx.base/com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)
at javafx.base/javafx.event.Event.fireEvent(Event.java:198)
at javafx.graphics/javafx.scene.Node.fireEvent(Node.java:8792)
at javafx.controls/javafx.scene.control.Button.fire(Button.java:203)
at javafx.controls/com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:208)
at javafx.controls/com.sun.javafx.scene.control.inputmap.InputMap.handle(InputMap.java:274)
at javafx.base/com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:247)
at javafx.base/com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
at javafx.base/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:234)
at javafx.base/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at javafx.base/com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base/com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at javafx.base/com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.base/javafx.event.Event.fireEvent(Event.java:198)
at javafx.graphics/javafx.scene.Scene$MouseHandler.process(Scene.java:3897)
at javafx.graphics/javafx.scene.Scene.processMouseEvent(Scene.java:1878)
at javafx.graphics/javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2623)
at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:411)
at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:301)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent(GlassViewEventHandler.java:450)
at javafx.graphics/com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:424)
at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:449)
at javafx.graphics/com.sun.glass.ui.View.handleMouseEvent(View.java:557)
at javafx.graphics/com.sun.glass.ui.View.notifyMouse(View.java:943)
at javafx.graphics/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop(WinApplication.java:184)
at java.base/java.lang.Thread.run(Thread.java:834)
附加信息
Link to the Mp3 file I used to test. https://drive.google.com/file/d/1CvAafbMviQ7nvKyojnem9GK73LJsD6MJ/view?usp=sharing
I am using JDK 11 and Javafx 17.0.2
System Type: 64-bit operating system, x64-based processor
Processor: Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz 2.81 GHz
Windows Edition: Windows 10 Home
感谢@Slaw 为我的问题提供了解决方案。为了解决我的问题，我创建了一个 deletionQueue ArrayList，它将保存我要删除的文件的路径。一旦在 MediaPlayer 上使用 .dispose() ，经过一定时间后，这些文件将被自动删除。