序列流_音频文件的切割与合并

public class SquenceStream {

public static void main(String[] args) throws Exception {

split(new File("F:/test/Beyond.mp3"),10, new File("F:/"));

System.out.println("文件切割完毕");

LinkedHashSet<FileInputStream> set = new LinkedHashSet<FileInputStream>();

set.add(new FileInputStream(new File("F:/part_1.mp3")));

set.add(new FileInputStream(new File("F:/part_2.mp3")));

set.add(new FileInputStream(new File("F:/part_3.mp3")));

set.add(new FileInputStream(new File("F:/part_4.mp3")));

combine(set, new File("F:/goal.mp3"));

System.out.println("文件合并完成");

}

/**
* 切割文件，切割份数，切割后保存路径
* @throws Exception 
*/

public static void split(File src,int num,File dir) throws Exception{

FileInputStream fis = new FileInputStream(src);

byte[] b = new byte[1024*300];

int len = 0;

FileOutputStream fos = null;

for (int i = 1; i <= num; i++) {

len = fis.read(b);

if (len != -1) {

fos = new FileOutputStream(dir + "part_" + i + ".mp3");

fos.write(b, 0, len);

}

fis.close();

fos.close();

}

/**
* 合并方法
* @throws Exception 
*/
public static void combine(LinkedHashSet<FileInputStream> set,File goal) throws Exception{

final Iterator<FileInputStream> it = set.iterator();

FileOutputStream fos = new FileOutputStream(goal);

SequenceInputStream seq = new SequenceInputStream(new Enumeration<InputStream>() {

public boolean hasMoreElements() {

return it.hasNext();

}

public InputStream nextElement() {

return it.next();

}

});

byte[] b = new byte[1024];

int len = 0;

while((len = seq.read(b)) != -1){

fos.write(b, 0, len);

}

fos.close();

seq.close();

}

}

备注：仅掌握序列流，为了体现核心代码，代码中未进行异常的处理。