英文:
How to correctly pass a path to a MediaPlayer (Error java.net.URISyntaxException)
问题
我想在按下按钮时播放一个mp3文件，所以我创建了一个按钮来创建一个音频播放器，这显然需要一个源。我尝试过通过路径(Path)或URI来传递源，但它不起作用，我总是会收到相同的错误(URISyntaxException)。
我像这样初始化我的按钮：
public class GUI
{
private String localFolder=System.getProperty("user.dir");
// 我正在获取我的应用程序执行的实际文件夹位置
private void audioInitialize() {
localFolder += File.separator + "src" + File.separator + "InUse" + File.separator;
File saves = new File(localFolder); // 需要路径用于其他用途
AudioButton button0 = new AudioButton("SONG", saves.getPath() + File.separator + "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();
}
}
这是AudioPlayer：
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$Handler.actionPerformed(AbstractButton.java:2308)
...
Caused by: java.net.URISyntaxException: Illegal character in opaque part at index 2: C:\Users\myUser\eclipse-workspace\Folder\src\InUse\song.mp3
at java.base/java.net.URI$Parser.fail(URI.java:2912)
...
如何解决这个问题呢？
英文:
I want to play a mp3 file when a button is pressed, so I created a button that create an audio player, which require, obviously, a source. I've tried to pass the source by a Path or a URI, but it doesn't work, I'll receive always the same error (URISyntaxException).
I initialize my buttons like this:
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);
/*
*
*
*/
}
This is my AudioButton class:
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();
}
}
There is AudioPlayer:
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;
}
And this is the console output:
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
How can I resolve this problem?
答案1
得分: 0
已找到解决方法：在AudioPlayer中，创建Media对象时，应将文件URI作为字符串传递给构造函数（很可能是这样，否则，根据错误信息我可以理解会出现解析问题）：
public AudioPlayer(String uri) {
@SuppressWarnings("unused")
JFXPanel pane=new JFXPanel();
this.uri=uri;
media=new Media(new File(uri).toUri().toString()); // 将新文件的URI作为字符串提供
mediaPlayer=new MediaPlayer(media);
}
英文:
Figured out how to solve the problem: in AudioPlayer, when creating the Media object you should give the constructor a file uri as a string (probably, otherwise, it create parsing problems as I could understand from errors):
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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