4_Java课程设计报告

《JA V A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：汪华登目录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，播放器界面如下详细设计package design.curriculum.JAVA;import java.awt.*;import java.awt.event.*;import javax.swing.*;import javax.swing.border.Border;import java.io.*;import javax.media.*;public class JMFPlayer extends JFrame implements ActionListener,ControllerListener{Player player=null;//声明一个Player对象String filePath;//存放音乐文件夹所在目录String fileName;//存放歌曲名称boolean click=false;//用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;JRadioButton sequenceBtn;JRadioButton singleBtn;JRadioButton randomBtn;ButtonGroup loopGroup;JButton beforeBtn;JButton nextBtn;JButton playBtn;JButton pauseBtn;JButton stopBtn;JButton fileBtn;JButton exitBtn;Component controlComponent;//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container.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.createEtchedBorder());loopjp=new JPanel();loopjp.setSize(400,50);container.add(loopjp);sequenceBtn=new JRadioButton("顺序播放");sequenceBtn.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent evt){loop = 1;}});singleBtn=new JRadioButton("单曲循环");singleBtn.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent evt){loop = 0;}});randomBtn=new JRadioButton("随机播放");randomBtn.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent evt){loop = 2;}});loopGroup=new ButtonGroup();loopGroup.add(sequenceBtn);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("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.addActionListener(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.createEtchedBorder();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(300,50);container.add(btn2jp);btn2jp.add(fileBtn);btn2jp.add(exitBtn);list=new List();list.setBackground(Color.pink);JScrollPane songListScroll = new JScrollPane(list);listjp.add(songListScroll, BorderLayout.CENTER);list.addMouseListener(new MouseAdapter() {//对歌曲点击的监听public void mouseClicked(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();}/** 对按钮事件的处理*/public void actionPerformed(ActionEvent e){if(e.getSource()==fileBtn){FileDialog dialog=new FileDialog(this,"音乐",FileDialog.LOAD);dialog.setVisible(true);filePath = dialog.getDirectory();if (filePath != null) {File filedir = new File(filePath);File[] filelist = filedir.listFiles();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;try{if(player!=null){player.stop();player.deallocate();}if(controlComponent!=null){songNamejp.remove(controlComponent);songNamejp.validate();}player=Manager.createPlayer(newMediaLocator("file:"+filePath+fileName));player.getDuration();player.prefetch();player.addControllerListener(this);songNameLable.setText(fileName);}catch (IOException e3) {}catch(NoPlayerException e2) {}}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));}elsereturn;}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(songIndex>=n){songIndex=0;}fileName=list.getItem(songIndex);run();}}}public void run(){try{if(player!=null){player.stop();player.deallocate();}if(controlComponent!=null){songNamejp.remove(controlComponent);songNamejp.validate();}player=Manager.createPlayer(newMediaLocator("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(ControllerEvent event){if(event 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){songIndex=(int)(Math.random()*1000)%n;fileName=list.getItem(songIndex);run();}}}validate();}/** 主程序*/public static void main(String srgs[]){new JMFPlayer();}}测试1.运行程序如下：2.点击文件夹按钮弹出文件对话框，选择音乐文件夹界面如下：3.点击一首歌曲并播放总结做这个播放器用了两周的时间，一开始去图书馆借了好些书，发现了好几种类型做播放器用的API，发现有些比较繁杂和功能性不强，最终选用了JMF。