音乐播放器Java课程设计报告

1、java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.*;impo

2、rt javax.media.*;public class jmfplayer extends jframe implements actionlistener,controllerlistenerplayer 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 seque

3、ncebtn;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

4、 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

5、);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

6、() 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 acti

7、onperformed(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

8、(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.addact

9、ionlistener(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(

10、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.setbackgr

11、ound(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.getselectedinde

12、x(); 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

13、(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(.m

14、p3) 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(new medialocator(file:+filepath+filename); player.getd

15、uration(); 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()=

16、stopbtn) if(player!=null) player.stop(); player.setmediatime(new time(0); else return; if(e.getsource()=beforebtn) int n=list.getitemcount(); if(songindexn) songindex=songindex-1; if(songindex0) songindex=n-1; filename=list.getitem(songindex); run(); if(e.getsource()=nextbtn) int n=list.getitemcount

17、(); 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(new medialocator(file:+filepath+file

18、name); 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 insta