用Java播放mp3音乐

import javax.sound.midi.*;import java.io.*;class MidiPlayer implements Runnable...{protected Sequence m_Midi;protected Sequencer m_player;public boolean m_bOk;private Thread m_thread;MidiPlayer(String FileName)...{File file=new File(FileName);m_bOk=true;m_thread=null;try...{m_Midi=MidiSystem.getSequence(file);}catch(InvalidMidiDataException ie)...{m_bOk=false;}catch(IOException ie)...{m_bOk=false;}try...{m_player=MidiSystem.getSequencer();}catch(MidiUnavailableException ie)...{m_bOk=false;}}public void run()...{while(m_thread!=null)...{try...{m_player.open();}catch(MidiUnavailableException ie)...{}try...{m_player.setSequence(m_Midi);}catch(InvalidMidiDataException ie)...{}m_player.start();while(m_player.isRunning()&&m_thread!=null)...{try...{Thread.sleep(1000);}catch(InterruptedException ie)...{}}m_player.close();}}public void play()...{if(m_player.isRunning()==false&&m_thread==null)...{try...{m_player.open();}catch(MidiUnavailableException ie)...{}try...{m_player.setSequence(m_Midi);}catch(InvalidMidiDataException ie)...{}m_player.start();}}public void loop()...{if(m_player.isRunning()==false&&m_thread==null)...{m_thread=new Thread(this);m_thread.start();}}public void stop()...{if(m_thread!=null&&m_thread.isAlive())m_thread.yield();m_thread=null;if(m_player.isRunning())m_player.close();}}//test.javaimport java.awt.*;import java.awt.event.*;class fr extends Frame implements ActionListener...{MidiPlayer p;Button b1,b2,b3;public fr()...{super("123");setLayout(new FlowLayout());p=new MidiPlayer("sound.mid");if(p.m_bOk==false)System.exit(0);b1=new Button("循环");b2=new Button("结束");b3=new Button("播放");add(b1);add(b2);add(b3);b1.addActionListener(this);b2.addActionListener(this);b3.addActionListener(this);addWindowListener(new WindowAdapter()...{public void windowClosing(WindowEvent e)...{setVisible(false);System.exit(0);}});setSize(200,200);setVisible(true);}public void actionPerformed(ActionEvent e)...{if(e.getSource()==b1)...{p.loop();}else if(e.getSource()==b2)...{p.stop();}else if(e.getSource()==b3)p.play();}}public class test...{public static void main(String args[])...{fr f=new fr();}}用Java实现支持多线程的socket通信//Server.java/**//** Created on 2004-8-11** To change the template for this generated file go to* Window>Preferences>Java>Code Generation>Code and Comments*/package socket_communicate;import java.io.*;import java.net.*;//用java实现支持多线程的socket通信/**//*** @author Administrator** To change the template for this generated type comment go to* Window>Preferences>Java>Code Generation>Code and Comments*/public class Server ...{public Server(int port)...{ServerSocket serversocket=null;try...{serversocket=new ServerSocket(port); }catch(IOException e)...{System.out.println("Error occurs when listening to port:"+port);System.exit(0);}System.out.println("Server is listening to port "+port);Socket clientsocket=null;try...{clientsocket=serversocket.accept();}catch(IOException e)...{System.out.println("Error occurs:"+e.getMessage());System.exit(0);}try ...{PrintWriter out=new PrintWriter(clientsocket.getOutputStream(),true);//用来向客户端输出信息BufferedReader in=new BufferedReader(new InputStreamReader(clientsocket.getInputStream()));String line;while((line=in.readLine())!=null)...{out.println("The message send form Client to Server is:"+line+".");//这条语句将向客户端输出信息System.out.println("Message from Client is:"+line);//向标准输出设备输出信息}in.close();out.close();clientsocket.close();serversocket.close();}catch(IOException e)...{System.err.println("Error:"+e.getMessage());}}public static void main(String[] args) ...{Server server=new Server(85);}}//Client.java/**//** Created on 2004-8-11** To change the template for this generated file go to* Window>Preferences>Java>Code Generation>Code and Comments*/package socket_communicate;import java.io.*;import java.net.*;/**//*** @author Administrator** To change the template for this generated type comment go to* Window>Preferences>Java>Code Generation>Code and Comments*/public class Client ...{public Client(String hostname,int port)...{try...{Socket clientsocket=new Socket(hostname,port);PrintWriter out=new PrintWriter(clientsocket.getOutputStream(),true); BufferedReader in=new BufferedReader(new InputStreamReader(clientsocket.getInputStream()));BufferedReader user_in=new BufferedReader(new InputStreamReader(System.in));String line_user;String line_server;while((line_user=user_in.readLine())!=null)...{ if(line_user.equals("88"))//断开连接的输入break;out.println(line_user);line_server=in.readLine();System.out.println("Client receive:"+line_server);}out.close();in.close();clientsocket.close();} catch (UnknownHostException e)...{System.out.println("Unknown Host Name!");System.exit(0); } catch (IOException e) ...{System.out.println("Error:"+e.getMessage()); }}public static void main(String[] args) ...{Client client=new Client("168.168.168.32",85);}}用Java程序解决服务器JSP子页面不能及时更新的问题import java.io.*;public class FileChange ...{public static void main(String[] args) throws IOException...{File Path=new File(args[0]); //获取应用程序文件目录FileChange FC=new FileChange();FC.listPath(Path); //调用方法，改变目录下的文件}void listPath(File Path) throws IOException ...{File[] files;files=Path.listFiles(); //获取目录下文件的列表for(int i=0;i<files.length;i++)...{try ...{RandomAccessFile f=new RandomAccessFile(files[i],"rw");//以读写的方式打开一个文件f.seek(f.length()); //将文件指针放在文件尾f.writeBytes(" "); //模拟键入回车件动作改变文件，但不改变文件实质内容f.close();}catch(FileNotFoundException e) ...{System.out.println(e.getMessage());}}}}基于JAVA快速排序的新应用class dulist...{public int key;public dulist next,pre; //定义双向指针的结点public dulist (int key)...{ //构造一个双向指针均为空的结点this.key=key;next=null;pre=null;}public dulist creatdulist(int a[],int n)...{ //创建一个带头结点的双向循环链表dulist p,q,la=new dulist(n); //n为链表长度int i;la.next=la; // la为头结点la.pre=la;q=la; //q为跟随指针for(i=0;i<n;i++)...{p=new dulist(a[i]);q.next=p;p.pre=q;q=p;}q.next=la;la.pre=q;return la;}public dulist qkpass (dulist la,dulist p,dulist q)...{int t,pivotkey; //一趟快速排序，返回枢轴位置t=pivotkey=p.key; //用表的第一个结点作枢轴while (p!=q) //从子表的两端交替地向中间扫描...{while(p!=q&&q.key>=pivotkey) q=q.pre;p.key=q.key; //将比枢轴小的结点移到低端while(p!=q&&p.key<=pivotkey) p=p.next;q.key=p.key; //将比枢轴大的移到高端}p.key=t; //枢轴结点到位return p;}public void sort(dulist la,dulist low,dulist high)...{dulist pivotloc; // low和high为头和尾的子表快排if(low!=high)...{pivotloc=qkpass(la,low,high); //将la一分为二if(low.key<pivotloc.key) //枢轴在low之后sort(la,low,pivotloc.pre);//对子表递归快排if(high.key>pivotloc.key) //枢轴在high之前sort(la,pivotloc.next,high);} //对高子表递归快排}public void printdulist(dulist la)...{dulist p=la.next; //打印链表中的数据域while(p!=la)...{System.out.println(p.key+"");p=p.next;}System.out.println();}}public class qsort...{public static void main(String[] args)...{dulist la;int[] a=new int[]...{3,2,1,6,5,10,9,8,7,4};la=dulist.creatdulist(a,10); //将数组元素存于链表la.printdulist(la);la.sort(la,la.next,la.pre);la.printdulist(la);}}//BorderLayoutTest.javaimport java.awt.*;import java.awt.event.*;import javax.swing.*;import javax.swing.border.*;import javax.swing.event.*;public class test1{ public static void main(String[] args){ cloneFrame frame = new cloneFrame();frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.show();}}class cloneFrame extends JFrame{public cloneFrame(){setTitle("机试程序");setSize(600, 400);JPanel buttonPanel = new JPanel();buttonPanel.setBackground(new Color(56,43,85));Button1 = new JButton("点击复制反转字符串");Button1.addActionListener(new turnListener());buttonPanel.add(Button1);JPanel textPanel = new JPanel();textPanel.setBackground(new Color(100,100,100));field1 = new JTextField("姓名：老孙；学号：2004132028", 20);field2 = new JTextField("反转", 20);field2.setEditable(false);textPanel.add(field1);textPanel.add(field2);JPanel tuPanel = new JPanel();JLabel label = new JLabel(new ImageIcon("006.gif"));tuPanel.add(label);tuPanel.setBackground(new Color(100,100,100));Container contentPane = getContentPane();contentPane.add(buttonPanel, BorderLayout.SOUTH);contentPane.add(textPanel, BorderLayout.NORTH);contentPane.add(tuPanel, BorderLayout.CENTER);contentPane.setBackground(new Color(100,100,100));}private class turnListenerimplements ActionListener{public void actionPerformed(ActionEvent event){String gets = field1.getText();int i = gets.length();StringBuffer buffer = new StringBuffer(i);for(int j=i-1;j>=0;j--){buffer.append(gets.charAt(j));}String gets2 = buffer.toString();field2.setText(gets2);}}private JButton Button1;private JTextField field1;private JTextField field2;}如何在指定目录下查找java类文件import java.io.*;import java.util.jar.*;import java.util.Enumeration;/*** <p>Title: SearchClass</p>** <p>Descriptionc:查找指定目录下的class文件 </p>** <p>Copyright: Copyright (c) 2005</p>** <p>Company:OpenSystem&MiddleWare Group of UESTC</p>** @author: <a href="mailto:huangmx@yeah">an_ant</a>* @version 1.0*/public class SearchClass {static String className = "";static int result = 0;static boolean flag = false;/*** visit** @param f File* @throws Exception* @todo 访问文件,并比较是否为要查找的class文件*/public static void visit(File f) throws Exception {if (! (f.isDirectory())) {String fileName = f.getName();//f为jar文件if (fileName.lastIndexOf(".jar") > 0) {try {JarFile jarFile = new JarFile(f);JarEntry jarEntry = jarFile.getJarEntry(className);if (jarEntry != null) {result++;System.out.println(result + ":在jar文件" + f + "中找到");}Enumeration e = jarFile.entries();while (e.hasMoreElements()) {String inname = e.nextElement().toString();int j = inname.lastIndexOf("/");if (j > 0) {String suffix = inname.substring(j + 1, inname.length());if (suffix.equals(className))flag = true;}if (flag) {result++;System.out.println(result + ":在jar文件：" + f + "中找到");System.out.println(inname);flag = false;break;}}}catch (Exception e) {e.printStackTrace();}}//f为class文件else if (fileName.lastIndexOf(".class") > 0) {if (fileName.equals(className)) {result++;System.out.println(result + ":在class文件" + f + "中找到");}}}else {throw new Exception("发生意外！");}}/*** walk** @param f File* @todo 递归目录*/public static void walk(File f) {//如果当前File是个文件，调用visit();if (f.isFile())try {visit(f);}catch (Exception e) {e.printStackTrace();}//如果当前File是个目录，存储其子目录，并递归调用walk();else if (f.isDirectory()) {String list[] = f.list();for (int i = 0; i < list.length; i++)walk(new File(f, list[i]));}}/*** main** @param args String[]* @todo 主函数*/public static void main(String args[]) {if (args.length > 1) {className = args[1] + ".class";try {File srcDirectory = new File(args[0]);File firstList[] = srcDirectory.listFiles();for (int i = 0; i < firstList.length; i++) {if (firstList[i].exists()) {walk(firstList[i]);}elseSystem.err.println("不能读取目录: " + srcDirectory);}System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");System.out.println("搜索结果:共出现" + result + "处");}catch (Exception e) {e.printStackTrace();}}else {System.out.println("输入格式有误!");System.out.println("正确输入格式：java SearchClass 搜索目录 类名称");}}}Java图像处理技术//以下是创建图过程的程序代码：import java.applet.Applet;import java.awt.BorderLayout;import com.sun.j3d.utils.applet.MainFrame;import com.sun.j3d.utils.geometry.*;import com.sun.j3d.utils.universe.*;import javax.media.j3d.*;import javax.vecmath.*;public class simplebox extends Applet...{//创建BranchGroup节点public BranchGroup createSceneGraph()...{BranchGroup objRoot=new BranchGroup();//生成坐标系TransformGroup objTrans=new TransformGroup();objRoot.addChild(objTrans);//定义外观Appearance app=new Appearance();//定义材质，设置材质的发射光为红色Material material=new Material();material.setEmissiveColor(new Color3f(1.0f,0.0f,0.0f));app.setMaterial(material);//定义几何体Box b=new Box(.4f,.4f,.4f,app);objTrans.addChild(b);objRoot.compile();return objRoot;}//定义simplebox构造器，在构造器中定义布局管理，画布，场景，视图public simplebox()...{setLayout(new BorderLayout());Canvas3D c=new Canvas3D(null);add("Center",c);BranchGroup scene=createSceneGraph();SimpleUniverse u=new SimpleUniverse(c);u.getViewingPlatform().setNominalViewingTransform();u.addBranchGraph(scene);}public static void main(String[] args)...{new MainFrame(new simplebox(),256,256);}} 相关资源：Java音乐播放 简单demo