java - 如何正确地将路径传递给 MediaPlayer(错误 java.net.URISyntaxException)
问题描述
我想在按下按钮时播放 mp3 文件,所以我创建了一个按钮来创建音频播放器,显然它需要一个源。我尝试通过路径或 URI 传递源,但它不起作用,我将始终收到相同的错误 (URISyntaxException)。我像这样初始化我的按钮:
public class GUI
{
private String localFolder=System.getProperty("user.dir");
// I'm taking the actual folder where my app is executed
private void audioInitialize() {
localFolder+=File.pathSeparator+"src"+File.pathSeparator+"InUse"+File.pathSeparator;
File saves=new File(localFolder); // need the path for other use
AudioButton button0=new AudioButton("SONG", saves.getPath()+File.pathSeparator+"song.mp3", true);
buttons.add(button0);
/*
*
*
*/
}
这是我的 AudioButton 类:
public class AudioButton extends JButton implements ActionListener
{
private String uri;
private final boolean isCustom;
public AudioButton(String label, String uri, boolean isCustom) {
this.uri=uri;
this.isCustom=isCustom;
this.setText(label);
this.setBackground(new Color(205, 205, 205));
this.setBorderPainted(true);
this.addActionListener(this);
}
public String getUri() {return this.uri;}
public boolean isCustom() {return this.isCustom;}
@Override
public void actionPerformed(ActionEvent e)
{
AudioPlayer player=new AudioPlayer(this.uri);
player.getPlayer().play();
}
}
有音频播放器:
public class AudioPlayer extends JPanel
{
private final String uri;
private Media media;
private MediaPlayer mediaPlayer;
public AudioPlayer(String uri) {
@SuppressWarnings("unused")
JFXPanel pane=new JFXPanel();
this.uri=uri;
media=new Media(uri);
mediaPlayer=new MediaPlayer(media);
}
public MediaPlayer getPlayer() {return this.mediaPlayer;
}
这是控制台输出:
Picked up _JAVA_OPTIONS: -Xmx512M
C:\Users\myUser\eclipse-workspace\Folder\src\InUse
Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: java.net.URISyntaxException: Illegal character in opaque part at index 2: C:\Users\myUser\eclipse-workspace\Folder\src\InUse\song.mp3
at javafx.media/javafx.scene.media.Media.<init>(Media.java:385)
at projectName.AudioPlayer.<init>(AudioPlayer.java:18)
at projectName.AudioButton.actionPerformed(AudioButton.java:27)
at java.desktop/javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1967)
at java.desktop/javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2308)
at java.desktop/javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:405)
at java.desktop/javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:262)
at java.desktop/javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:269)
at java.desktop/java.awt.Component.processMouseEvent(Component.java:6578)
at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3343)
at java.desktop/java.awt.Component.processEvent(Component.java:6343)
at java.desktop/java.awt.Container.processEvent(Container.java:2259)
at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:4961)
at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2317)
at java.desktop/java.awt.Component.dispatchEvent(Component.java:4793)
at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4904)
at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4539)
at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4480)
at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2303)
at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2758)
at java.desktop/java.awt.Component.dispatchEvent(Component.java:4793)
at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:766)
at java.desktop/java.awt.EventQueue.access$500(EventQueue.java:97)
at java.desktop/java.awt.EventQueue$3.run(EventQueue.java:717)
at java.desktop/java.awt.EventQueue$3.run(EventQueue.java:711)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:89)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:99)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:739)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:737)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:89)
at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:736)
at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:199)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
Caused by: java.net.URISyntaxException: Illegal character in opaque part at index 2: C:\Users\myUser\eclipse-workspace\Folder\src\InUse\song.mp3
at java.base/java.net.URI$Parser.fail(URI.java:2912)
at java.base/java.net.URI$Parser.checkChars(URI.java:3083)
at java.base/java.net.URI$Parser.parse(URI.java:3119)
at java.base/java.net.URI.<init>(URI.java:598)
at javafx.media/javafx.scene.media.Media.<init>(Media.java:383)
... 38 more
我该如何解决这个问题?
解决方案
想出了如何解决这个问题:在 AudioPlayer 中,当创建 Media 对象时,你应该给构造函数一个文件 uri 作为一个字符串(可能,否则,它会产生解析问题,正如我可以从错误中理解的那样):
public AudioPlayer(String uri) {
@SuppressWarnings("unused")
JFXPanel pane=new JFXPanel();
this.uri=uri;
media=new Media(new File(uri).toUri().toString()); // giving the uri of a new file as a string
mediaPlayer=new MediaPlayer(media);
}
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