java - 如何让我的 JavaFX 程序加载文件?
问题描述
我正在尝试使用 SceneBuilder 创建一个 JavaFX Mp3 项目。我对此有点陌生,在其中一个按钮中,我试图让它打开一个 mp3 文件,以便它可以播放。但是,我收到以下错误。
Exception in thread "JavaFX Application Thread" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at javafx.fxml/javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1787)
at javafx.fxml/javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1670)
at javafx.base/com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at javafx.base/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
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$MouseHandler.process(Scene.java:3862)
at javafx.graphics/javafx.scene.Scene.processMouseEvent(Scene.java:1849)
at javafx.graphics/javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2590)
at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:409)
at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:299)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:391)
at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$2(GlassViewEventHandler.java:447)
at javafx.graphics/com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:412)
at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:446)
at javafx.graphics/com.sun.glass.ui.View.handleMouseEvent(View.java:556)
at javafx.graphics/com.sun.glass.ui.View.notifyMouse(View.java:942)
at javafx.graphics/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
at java.base/java.lang.Thread.run(Thread.java:830)
Caused by: java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at com.sun.javafx.reflect.Trampoline.invoke(MethodUtil.java:76)
at jdk.internal.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at javafx.base/com.sun.javafx.reflect.MethodUtil.invoke(MethodUtil.java:273)
at javafx.fxml/com.sun.javafx.fxml.MethodHelper.invoke(MethodHelper.java:83)
at javafx.fxml/javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1784)
... 28 more
Caused by: java.lang.IllegalArgumentException: java.net.URISyntaxException: Illegal character in path at index 7: [insert music file name]
at javafx.scene.media.Media.<init>(Media.java:385)
at sample.Controller.fileImageBtnPressed(Controller.java:56)
... 39 more
请注意[插入音乐文件名]不是实际的代码,但它基本上像Music Recording.mp3
这是JavaFX控制器中文件打开方法的实际代码。
public void fileImageBtnPressed() {
fileOpenImageView.setImage(fileButtonPressed);
FileChooser fileChooser = new FileChooser();
FileChooser.ExtensionFilter fileExtension = new FileChooser.ExtensionFilter("music files", "*.mp3");
fileChooser.getExtensionFilters().add(fileExtension);
fileChooser.setTitle("Choose an MP3 file");
File mp3File = fileChooser.showOpenDialog(new Stage());
if (mp3File != null) {
// listView.getItems().add(mp3File.getName());
Media mediaPlayer = new Media(mp3File.getName());
MediaPlayer mP = new MediaPlayer(mediaPlayer);
listView.getItems().add(mP);
} else {
System.out.println("Incorrect file");
}
}
我对 JavaFX 还是有点陌生,所以我想知道,我可能做错了什么?
我想这可能是 UriException 错误,但如果是这样,我该怎么办?
解决方案
而不是mp3File.getName()
尝试使用mp3File.toURI().toString()
.
例子
下面的示例来自我如何在 javafx 中播放来自 FileChooser 的视频,并进行一些小的修改:
public void fileImageBtnPressed() {
FileChooser fileChooser = new FileChooser();
FileChooser.ExtensionFilter fileExtension = new FileChooser.ExtensionFilter("select your music file (*.mp3)", "*.mp3");
fileChooser.getExtensionFilters().add(fileExtension);
File mp3File= fileChooser.showOpenDialog(new Stage());
if (mp3File != null) {
Media source = new Media(mp3File.toURI().toString());
MediaPlayer player = new MediaPlayer(source);
listView.getItems().add(player);
player.play();
} else {
System.out.println("Incorrect file");
}
}
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