Java音频播放问题不知出在哪里播放不了。。

fearlessMore 2012-08-09 11:45:48

代码写得很清楚，很易懂，但是不知问题。。：



package com.han;



import java.applet.Applet;

import java.applet.AudioClip;

import java.awt.Container;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.io.File;

import java.net.MalformedURLException;

import java.net.URL;



import javax.swing.JButton;

import javax.swing.JFileChooser;

import javax.swing.JFrame;

import javax.swing.JTextField;

import javax.swing.SpringLayout;

import javax.swing.filechooser.FileNameExtensionFilter;



@SuppressWarnings("serial")

public class MusicPlay extends JFrame {

	private AudioClip audioClip;



	public MusicPlay() {

		// TODO Auto-generated constructor stub

		/* prepare the components needed to display */

		Container container = getContentPane();

		SpringLayout springLayout = new SpringLayout();

		container.setLayout(springLayout);

		final JTextField textField = new JTextField();

		JButton buttonSelect = new JButton("选择文件");

		JButton buttonPlay = new JButton("播放");

		JButton buttonStop = new JButton("停止");

		JButton buttonLoop = new JButton("循环");

		

		/* use the SpringLayout to layout the components */

		container.add(buttonLoop);

		springLayout.putConstraint(SpringLayout.EAST, buttonLoop, -5, SpringLayout.EAST, container);

		springLayout.putConstraint(SpringLayout.NORTH, buttonLoop, 5, SpringLayout.NORTH, container);

		container.add(buttonStop);

		springLayout.putConstraint(SpringLayout.NORTH, buttonStop, 0, SpringLayout.NORTH, buttonLoop);

		springLayout.putConstraint(SpringLayout.EAST, buttonStop, -5, SpringLayout.WEST, buttonLoop);

		container.add(buttonPlay);

		springLayout.putConstraint(SpringLayout.NORTH, buttonPlay, 0, SpringLayout.NORTH, buttonStop);

		springLayout.putConstraint(SpringLayout.EAST, buttonPlay, -5, SpringLayout.WEST, buttonStop);

		container.add(buttonSelect);

		springLayout.putConstraint(SpringLayout.NORTH, buttonSelect, 0, SpringLayout.NORTH, buttonPlay);

		springLayout.putConstraint(SpringLayout.EAST, buttonSelect, -5, SpringLayout.WEST, buttonPlay);

		container.add(textField);

		springLayout.putConstraint(SpringLayout.NORTH, textField, 0, SpringLayout.NORTH, buttonSelect);

		springLayout.putConstraint(SpringLayout.EAST, textField, -5, SpringLayout.WEST, buttonSelect);

		springLayout.putConstraint(SpringLayout.WEST, textField, 5, SpringLayout.WEST, container);

		springLayout.putConstraint(SpringLayout.SOUTH, textField, 0, SpringLayout.SOUTH, buttonSelect);

		

		/* add Listeners */

		buttonSelect.addActionListener(new ActionListener() {



			@Override

			public void actionPerformed(ActionEvent e) {

				// TODO Auto-generated method stub

				JFileChooser fileChooser = new JFileChooser();

				File dir = new File("C:\\Users\\Public\\Music\\Sample Music");

				if (dir.exists()) {

					fileChooser.setCurrentDirectory(dir);

				} else {

					System.out.println("找不到程序预指定的当前目录，当前目录将被" +

							"设定为系统相关的默认目录");

					fileChooser.setCurrentDirectory(null);

				}

				FileNameExtensionFilter filter = new FileNameExtensionFilter(

						"支持的音频文件（*.mid; *.wav; *.au;）", "mid", "wav", "au");

				FileNameExtensionFilter filter2 = new FileNameExtensionFilter(

						"支持的音频文件（*.mp3; *.mid; *.wav; *.au;）", "mp3", "mid", "wav", "au");

				fileChooser.addChoosableFileFilter(filter);

				fileChooser.addChoosableFileFilter(filter2);

				fileChooser.setFileFilter(filter); 

				int i = fileChooser.showOpenDialog(getContentPane());

				if (i == JFileChooser.APPROVE_OPTION) {

					File file = fileChooser.getSelectedFile();

					textField.setText(file.getPath());

					try {

						URL audioFilePath = file.toURI().toURL();

						audioClip = Applet.newAudioClip(audioFilePath);

					} catch (MalformedURLException e1) {

						// TODO Auto-generated catch block

						e1.printStackTrace();

					}

				}

			}

			

		});

		

		buttonPlay.addActionListener(new ActionListener() {



			@Override

			public void actionPerformed(ActionEvent e) {

				// TODO Auto-generated method stub

					audioClip.play();

			}

			

		});

		

		buttonStop.addActionListener(new ActionListener() {



			@Override

			public void actionPerformed(ActionEvent e) {

				// TODO Auto-generated method stub

				audioClip.stop();

			}

			

		});

		

		buttonLoop.addActionListener(new ActionListener() {



			@Override

			public void actionPerformed(ActionEvent e) {

				// TODO Auto-generated method stub

				audioClip.loop();

			}

			

		});

		

		/* initialize the frame */

		setTitle("音频播放");

		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		setBounds(100, 100, 600, 75);

		setVisible(true);

	}



	/**

	 * @param args

	 */

	public static void main(String[] args) {

		// TODO Auto-generated method stub

		new MusicPlay();

	}



}