mediaplayer.java

MP3播放器 Java做的 MP3播放器 Java做的

 }
 private void openDir()
 {
  JFileChooser fileChooser=new JFileChooser();
  fileChooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
  int result=fileChooser.showOpenDialog(MediaPlayer.this);
  if(result==JFileChooser.CANCEL_OPTION)
  return;
  file=fileChooser.getSelectedFile();
  if(file==null||file.getName().equals(""))
  JOptionPane.showMessageDialog(this,"错误的路径",
  "出错了",JOptionPane.ERROR_MESSAGE);
  String[] sFiles=file.list();
  for(int i=0;i<sFiles.length;i++)
  {
   fileName.addElement(sFiles[i]);
   numList.addElement((numList.size()+1)+"."+sFiles[i]);
   dirName.addElement(file.getAbsolutePath()+"\\"+sFiles[i]);
  }
  list.setListData(numList);
  
  
  /*fd=new FileDialog(MediaPlayer.this);
  fd.setVisible(true);
  if(fd.getDirectory()!=null)
  {
   File fileDir=new File(fd.getDirectory());
   String[] ss=fileDir.list();
   for(int i=0;i<ss.length;i++)
   {
    System.out.println(ss[i]);
   }
  }*/
 }
 
 private void createPlayer()
 {
  closePreviosPlayer();//关闭先前的媒体播放器
  String extendName="此播放器好象不支持"+title.substring(title.lastIndexOf(".")+1)+"格式";
  try
  {
   player=Manager.createPlayer(file.toURL());//javax.media.Manager直接继承于java.lang.object,且它为final,不能被继承
   
   player.addControllerListener(new ControllerHand());
   player.start();
   addList(files);
   index=fileName.size()-1;
   list.setSelectedValue(numList.elementAt(index),true);
   //list.setSelectedIndex(index);
   //list.setSelectionForeground(Color.blue);
   setTitle(title);
   
   //addList("files");//到播放清单
   //title="file.getAbsoluteFile()";
   
  }
  catch(Exception e)
  {
   JOptionPane.showMessageDialog(this,extendName,"出错了!!",JOptionPane.ERROR_MESSAGE);
   setTitle(extendName);
  }
  
  
  
 }
 
 private void closePreviosPlayer()
 {
  if(player==null)
  return;
  
  //player.close();//首先停止播放
  /*
   *不能用上面的代码停止，要用下面的两行取代，否则Component visual =player.getVisualComponent();发生异常
   **/
  player.stop();      
     player.deallocate(); //停止播放并且重新装载DateSource
  
  Component visual =player.getVisualComponent();
  Component control=player.getControlPanelComponent();
  
  if(visual!=null)
  {
   panel.remove(visual);
  }
  if(control!=null)
  {
   panel.remove(control);
  }
  
 }
 
 private class ControllerHand implements ControllerListener
 {
  public void controllerUpdate(ControllerEvent e)
  {
   if(e instanceof RealizeCompleteEvent)
   {
    Component visual=player.getVisualComponent();
    
    if(visual!=null)
    {
     //System.out.println("音频播放器不支持视频图象功能");
     //setTitle("音频播放器不支持视频图象功能");
     
     panel.removeAll();
        panel.add(visual,BorderLayout.CENTER);
    }
    else
    {
     panel.add(label,BorderLayout.CENTER);
    }///此else语句可以防止因为原来播放视频图象后以后没有界面
    
    
    Component control=player.getControlPanelComponent();
    
    if(control!=null)
    {
     
     
     panel.add(control,BorderLayout.SOUTH);
    }
    
    //c.validate();
    panel.doLayout();
    return;
   }
   
   if (e instanceof EndOfMediaEvent) 
            { 
                /*if (loop) 
                { 
                    player.setMediaTime (new Time (0)); 
                    player.start (); 
                } 
                return;*/
                if(buttonValues[0].isSelected())
                {
                 if(fileName.size()==0)
                 return;
                 index=(int)(Math.random()*fileName.size());
                }
                if(buttonValues[1].isSelected())
                {
                 if(fileName.size()==0)
                 return;//必须有此if语句，否则当用户把播放列表清空的时候发生异常，偶然的机会发现的
                 //现在感觉测试软件真是太重要了，看来以后程序做好后要反复测试，考虑各种情况
                 index=(index+1)%fileName.size();
                }
                if(buttonValues[2].isSelected())
                {
                    player.setMediaTime (new Time (0)); 
                    player.start();  
                } 
                createPlayer2();
                
      }
     }
 }
 private void exity_n()
 {
  /*int exi;
  exi=JOptionPane.showConfirmDialog(this,"真的要离开么？","退出程序",JOptionPane.YES_NO_OPTION,
  JOptionPane.QUESTION_MESSAGE);
  //if(exi==null)
  if(exi==JOptionPane.YES_OPTION)
  {
   saveList();
   System.exit(0);
  }
  
  return;*/
  saveList();
  System.exit(0);
  
 }
  private void addList(String vf)
 {
  //fileReadList=new fileReadList(fdd,)
  //try
  //{
   //int i=0;
   //fileName.addElement((fileName.size()+1)+"."+vf);
   fileName.addElement(vf);
   numList.addElement((numList.size()+1)+"."+vf);
   //fileName.addElement(++i+"."+vf);
   dirName.addElement(title);
   list.setListData(numList);
  //}
  /*catch(Exception e)
  {
   e.printStackTrace();
   //System.out.println(e.getMessage());
  }*/
  
  
 }
 private void createPlayer2()
 {
  
  try{title=dirName.elementAt(index).toString();}
  //title=dirName.elementAt(index).toString();
  catch(ArrayIndexOutOfBoundsException e)
  {return;}
  file=new File(title);
  closePreviosPlayer();//关闭先前的媒体播放器
  String extendName="此播放器好象不支持"+title.substring(title.lastIndexOf(".")+1)+"格式";
  try
  {
   player=Manager.createPlayer(file.toURL());//javax.media.Manager直接继承于java.lang.object,且它为final,不能被继承
   
   player.addControllerListener(new ControllerHand());
   player.start();
   //list.setSelectedIndex(index);
   list.setSelectedValue(numList.elementAt(index),true);
   //list.setSelectionForeground(Color.blue);
   //list.setSelectedIndex(index);
   //addList(files);
   setTitle(title);
   
   //addList("files");//到播放清单
  
  }
  catch(Exception e)
  {
   //JOptionPane.showMessageDialog(this,extendName,"出错了!!",JOptionPane.ERROR_MESSAGE);
   //setTitle(extendName);
   String ex=null;
   try{ex=fileName.elementAt(index).toString();
   }
   catch(Exception e1){return;}
   fileName.removeElementAt(index);
   numList.removeAllElements();
   Enumeration enumFile=fileName.elements();
   while(enumFile.hasMoreElements())
   {
    numList.addElement((numList.size()+1)+"."+enumFile.nextElement());
    
   }
   
   dirName.removeElementAt(index);
   //list.setListData(fileName);
   list.setListData(numList);
  
   
   System.out.println("已经从播放列表中删除 "+"\""+ex+"\""+" 文件,"
   +"因为此播放器不支持"+ex.substring(ex.lastIndexOf(".")+1)+"格式,"
   +"不过没有从硬盘真正删除");
   if(numList.size()!=0)
   {
    index%=numList.size();
       createPlayer2();
   }
  }
  
 }
 private void saveList()
 {
  Enumeration enumFile=fileName.elements();
  Enumeration enumDir =dirName.elements();
  try
  {
   output=new ObjectOutputStream(new BufferedOutputStream(new FileOutputStream(listFile)));
   while(enumFile.hasMoreElements())
   {
    listWriteFile=new ListValues(enumFile.nextElement().toString(),enumDir.nextElement().toString());
    output.writeObject(listWriteFile);
   }
   output.flush();
   output.close();
   
  }
  catch(Exception e)
  {
   e.printStackTrace();
  }
  /*finally
  {
   output.flush();
   output.close();//郁闷，这两行不能写在这里，实在是一大遗憾啊，不知道有什么别的方法
  }*/
  
  
 }
 public void run()
 {
  try
  {
   Thread.sleep(1);
  }
  catch(InterruptedException e)
  {
  }
  
  try
  {
   if(!listFile.exists())
   {
    listFile.createNewFile();//防止不存在此文件发生读取错误，这两行代码保证不存在的情况下自动建立
    return;
   }
   
   input=new ObjectInputStream(new BufferedInputStream(new FileInputStream(listFile)));
   while(true)
   {
    listWriteFile=(ListValues)input.readObject();
    fileName.addElement(listWriteFile.getFileName());
    numList.addElement((numList.size()+1)+"."+listWriteFile.getFileName());
    dirName.addElement(listWriteFile.getDirName());
       
   }
  }
  catch(EOFException e)
  {
   try
   {
    //if(!fileName.isEmpty())
    input.close();//确认有元素存在并加载完毕后关闭输入流
   }
   catch(IOException e1)
   {
    JOptionPane.showMessageDialog(MediaPlayer.this,"文件被非正常关闭",
    "非法关闭",JOptionPane.ERROR_MESSAGE);
   }
   
  }
  catch(ClassNotFoundException e)
  {
   JOptionPane.showMessageDialog(MediaPlayer.this,"不能创建对象","对象创建失败",JOptionPane.ERROR_MESSAGE);
  }
  catch(IOException e)
  {
   JOptionPane.showMessageDialog(MediaPlayer.this,"不能读取文件",
   "读取文件失败",JOptionPane.ERROR_MESSAGE);
  }
  finally
  {
   try
   {
    if(input!=null)
    input.close();
   }
   catch(IOException e)
   {
   }
   
   if(dirName.isEmpty())//防止Vector越界
      {
        return;
      }
   index=(int)(Math.random()*(fileName.size()));//产生随即数，进行随即播放
   list.setListData(numList);
   //list.setListData(fileName);
   //list.setSelectedValue(fileName.elementAt(index),true);
   //list.ensureIndexIsVisible(index);//确保选择项可以看见
   //list.setSelectionForeground(Color.green);
   createPlayer2();
  }
  
 }
 private void checkMenu(MouseEvent e)
 {
  
  if(e.isPopupTrigger())
  {
   indexForDel=list.locationToIndex(e.getPoint());
   int[] selected={index,indexForDel};
   //Point p=new Point(e.getX(),e.getY());
   
   list.setSelectedIndices(selected);
   popupMenu.show(list,e.getX(),e.getY());
   
  }
  //list.setSelectedIndex(index);
 }
 String reNames() throws ReName//文件该名函数
 {
  String name=JOptionPane.showInputDialog(this,"请输入新的名字",fileName.elementAt(indexForDel));
  if(name==null||name.equals("")) throw new ReName();
  //必须把name==null放在前面，否则会发生NullPointerExceptin，这个很好理解，
  //当我们按了取消后，name会成为空，那么name.equals("")就会发生异常
  return name;
 }
 class ReName extends Exception//自定义异常来处理文件该名的时候发生输入为空的情形
 {
 }
 /*class Filters implements FilenameFilter
     {
      public boolean accept(File dir,String name)
      {
        return (name.endsWith(".exe"));
      }
    }*/
 
 
}