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我需要構建一個程序來播放.AMR/.AAC音樂文件。 我使用AudioSystem類構建了它,但它只支持太重的波形文件,無法使用EAR文件裝運。 請幫忙!!!在Java中播放.AMR/.AAC文件
這裏是我使用的:
package testSite;
import java.io.File;
import java.io.IOException;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.FloatControl;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
import javax.sound.sampled.UnsupportedAudioFileException;
public class AePlayWave extends Thread {
private String filename;
private Position curPosition;
private final int EXTERNAL_BUFFER_SIZE = 524288; // 128Kb
public static AePlayWave ob = null;
enum Position {
LEFT, RIGHT, NORMAL
};
public static AePlayWave getInstance(String wavfile) {
if (ob == null) {
ob = new AePlayWave(wavfile);
}
return ob;
}
private AePlayWave(String wavfile) {
filename = wavfile;
curPosition = Position.NORMAL;
}
public void run() {
File soundFile = new File(filename);
if (!soundFile.exists()) {
System.err.println("Wave file not found: " + filename);
return;
}
AudioInputStream audioInputStream = null;
try {
audioInputStream = AudioSystem.getAudioInputStream(soundFile);
} catch (UnsupportedAudioFileException e1) {
e1.printStackTrace();
return;
} catch (IOException e1) {
e1.printStackTrace();
return;
}
AudioFormat format = audioInputStream.getFormat();
SourceDataLine auline = null;
DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);
try {
auline = (SourceDataLine) AudioSystem.getLine(info);
auline.open(format);
} catch (LineUnavailableException e) {
e.printStackTrace();
return;
} catch (Exception e) {
e.printStackTrace();
return;
}
if (auline.isControlSupported(FloatControl.Type.PAN)) {
FloatControl pan = (FloatControl) auline
.getControl(FloatControl.Type.PAN);
if (curPosition == Position.RIGHT)
pan.setValue(1.0f);
else if (curPosition == Position.LEFT)
pan.setValue(-1.0f);
}
auline.start();
int nBytesRead = 0;
byte[] abData = new byte[EXTERNAL_BUFFER_SIZE];
try {
while (nBytesRead != -1) {
nBytesRead = audioInputStream.read(abData, 0, abData.length);
if (nBytesRead >= 0)
auline.write(abData, 0, nBytesRead);
}
} catch (IOException e) {
e.printStackTrace();
return;
} finally {
auline.drain();
auline.close();
}
}
}
嗨 - 「的.ear」 文件意味着 「J2EE」 和 「Web應用程序」。問:這是一個Web應用程序嗎?問:如果是這樣,爲什麼你需要編寫任何Java代碼來「玩」任何東西?你爲什麼不寫一些JSP(或其他)來爲* SERVER *提供.mp3文件(或.amr等),並讓* BROWSER *播放音頻片段? – paulsm4
對不起。我通過EAR我的意思是,一個自我可執行的Java文件。我對Swing應用程序有點新鮮......我需要在後臺播放音樂,並且需要將聲音文件作爲單個可執行文件的一部分。 –