音乐播放器Java课程设计报告

1、M林电牙科被大喙GUILIN UNIVERSITY OF ELECTRONIC TECHNOLOGYJAVA程序设计课程设计报告题目：音乐播放器学院：计算机科学与工程学院专业：信息管理与信息系统学生姓名：杨柏昌学号：1400320228指导老师：汪华登1. 概要设计 2. 详细设计 3. 测试 4. 总结 概要设计播放器主要使用JMF框架实现，播放器界面如下正在懵曲r未遗取强曲O咂席睛曲 O单曲循环 随机睡湎I上一首I.就I暂停I停止I 一首款曲列*选择文件夹 退出详细设计package design.curriculum.JAVA;import java.awt.*;import java.

2、awt.event.*;import javax.swing.*;import javax.swing.border.Border;import java.io.*;import javax.media.*;public class JMFPlayer extends JFrame implementsActionListener,ControllerListenerPlayer player =null ; / 声明一个 Player 对象StringfilePath; /存放音乐文件夹所在目录StringfileName ; /存放歌曲名称boolean click =false ; /用

3、来标记歌曲是否被点击int songIndex ; /歌曲元素在列表中的位置int loop =3; /作为播放模式的标记JLabel songNameLable ;JRadioButtonsequenceBtn;JRadioButtonsingleBtn ;JRadioButtonrandomBtn ;ButtonGroup loopGroup ;JButton beforeBtn ;JButtonnextBtn;JButtonplayBtn;JButton pauseBtn ;JButtonstopBtn;JButtonfileBtn;JButtonexitBtn;Component co

4、ntrolComponent ; /player 的控制面板Container container ;JPanel songNamejp ;JPanel loopjp ;JPanel btnjp ;JPanel listjp ;JPanel btn2jp ;List list ;public JMFPlayer()super ("音乐播放器");setBounds(480,50,400,600);setResizable( false ); /设置界面不可修改setVisible( true );container =getContentPane(); / 获得容器主面板c

5、ontainer .setLayout( new BoxLayout( container ,BoxLayout. Y_AXIS ); songNamejp =new JPanel( new GridLayout(2,2);songNamejp .setSize(400,50);container .add( songNamejp );songNameLable =new JLabel( " 正在播放：未选取歌曲 " );songNamejp .add( songNameLable );songNamejp .setBorder(BorderFactory.createEt

6、chedBorder ();loopjp =new JPanel();loopjp .setSize(400,50);container .add( loopjp );sequenceBtn =new JRadioButton( " 顺序播放 " );sequenceBtn .addActionListener(new ActionListener() public void actionPerformed(ActionEventevt )loop = 1;);singleBtn =new JRadioButton( " 单曲循环 " );singleB

7、tn .addActionListener(new ActionListener() public void actionPerformed(ActionEventevt )loop = 0; );randomBtn =new JRadioButton( " 随机播放 " );randomBtn .addActionListener(new ActionListener() public void actionPerformed(ActionEventevt )loop = 2;);loopGroup =new ButtonGroup();loopGroup .add( s

8、equenceBtn );loopGroup .add( singleBtn );loopGroup .add( randomBtn );loopjp .add( sequenceBtn );loopjp .add( singleBtn );loopjp .add( randomBtn );btnjp =new JPanel();btnjp .setLayout( new BoxLayout( btnjp ,BoxLayout. X_AXIS );btnjp .setSize(400,50);container .add( btnjp );beforeBtn =new JButton( &qu

9、ot; 上一首 " );playBtn =new JButton(" 播放 " );pauseBtn =new JButton( " 暂停 " );stopBtn =new JButton(" 停止 " );nextBtn =new JButton( " 下一首 " );beforeBtn .addActionListener( this );playBtn.addActionListener(this);pauseBtn .addActionListener( this );stopBtn.addAct

10、ionListener(this);nextBtn.addActionListener(this);btnjp .add( beforeBtn );btnjp .add( playBtn );btnjp .add( pauseBtn );btnjp .add( stopBtn );btnjp .add( nextBtn );listjp =new JPanel( new BorderLayout();listjp .setSize(300,300);container .add( listjp );Border border = BorderFactory. createEtchedBorde

11、r ();Border titled = BorderFactory. createTitledBorder ( border , " 歌曲列表 " );listjp .setBorder( titled );fileBtn=new JButton(" 选择文件夹" );exitBtn=new JButton(" 退出" );fileBtn.addActionListener(this );exitBtn.addActionListener(this );btn2jp =new JPanel();btnjp .setSize(300,

12、50);container .add( btn2jp );btn2jp .add( fileBtn);btn2jp .add( exitBtn);list =new List();list.setBackground(Color.pink );JScrollPanesongListScroll = new JScrollPane( list );listjp .add( songListScroll, BorderLayout.CENTER);list .addMouseListener( new MouseAdapter() / 对歌曲点击的监听public void mouseClicke

13、d(MouseEvent e) if ( e.getClickCount() = 1) fileName = list .getSelectedItem(); songIndex =list .getSelectedIndex(); click =true ; );addWindowListener (new WindowAdapter()public void windowClosing(WindowEvent e)if ( player != null ) player .stop(); player .deallocate();System.exit (0); );validate();

14、/* 对按钮事件的处理*/public void actionPerformed(ActionEvente)if ( e.getSource()= fileBtn )FileDialogdialog=new FileDialog(this, " 音乐 " ,FileDialogdialog .setVisible(true );filePath = dialog.getDirectory();if ( filePath != null ) LOAD);File filedir = new File( filePath );File filelist = filedir .l

15、istFiles(); for (File file : filelist ) String filename = file .getName().toLowerCase(); if( filename .endsWith( ".wav" )| filename .endsWith( ".mp3" ) list .add( filename );if ( e.getSource()= playBtn ) if ( click )click =! click ;tryif ( player != null ) player .stop();player .

16、deallocate();if ( controlComponent != null )songNamejp .remove( controlComponent ); songNamejp .validate();player =Manager. createPlayer( newMediaLocator("file:"+filePath +fileName);player.getDuration();player.prefetch();player.addControllerListener(thissongNameLable .setText( fileName );c

17、atch (IOExceptione3) catch (NoPlayerExceptione2) else if (! click ) player .start();if ( e.getSource()= exitBtn ) System. exit (0);if ( e.getSource()= pauseBtn ) if ( player != null )player .stop();if ( e.getSource()= stopBtn ) if ( player != null )player .stop();player .setMediaTime( new Time(0);el

18、se return ;if ( e.getSource()= beforeBtn )int n =list .getItemCount();if ( songIndex <n)songIndex =songIndex -1;if ( songIndex <0)songIndex =n-1;fileName =list .getItem( songIndex );run();if ( e.getSource()= nextBtn )int n =list .getItemCount();if ( songIndex <n)songIndex =songIndex +1;if (

19、 songIndex >=n) songIndex =0;fileName =list .getItem( songIndex );run();public void run() tryif ( player != null ) player .stop(); player .deallocate();if ( controlComponent != null ) songNamejp .remove( controlComponent ); songNamejp .validate();player =Manager. createPlayer ( newMediaLocator( &

20、quot;file:" +filePath +fileName );player .getDuration();player .prefetch();player .addControllerListener(this );songNameLable .setText( fileName );catch (IOException e3 ) catch (NoPlayerException e2) /* * 对控制面板事件的处理* */ public synchronized void controllerUpdate(ControllerEventevent )if ( event

21、instanceof RealizeCompleteEvent) if ( controlComponent =player .getControlPanelComponent()!=null )songNamejp .add( controlComponent );else if ( event instanceof PrefetchCompleteEvent) player .start();else if ( event instanceof EndOfMediaEvent)player .setMediaTime( new Time(0);if ( loop =0)player .start();if ( loop =1)int n=list .getItemCount();if ( songIndex <n)fileName =list .getItem( songIndex +1);songIndex =songIndex +1;run();if ( loop =2)int n=list .getItemCount();if ( songIndex <n)songInde