day19/StreamCopyMp3.java

/*演示mp3的复制，通过缓冲区。BufferedOutputStreamBufferedInputStream*/import java.io.*;class StreamCopyMp3 {public static void main(String[] args) throws IOException{/*long start = System.currentTimeMillis();copyMp3();long end = System.currentTimeMillis();System.out.println(end-start+"ms");*/long start1 = System.currentTimeMillis();copyMp3_MyBufferedInputStream();long end1 = System.currentTimeMillis();System.out.println(end1-start1+"ms");}//通过字节流的缓冲区完成复制public static void copyMp3()throws IOException{FileOutputStream fos = new FileOutputStream("E:\\javademo\\day19\\2.mp3");FileInputStream fis = new FileInputStream("E:\\javademo\\day19\\1.mp3");BufferedOutputStream bufos = new BufferedOutputStream(fos);BufferedInputStream bufis = new BufferedInputStream(fis);int buf=0;while((buf=bufis.read())!=-1){bufos.write(buf);}bufis.close();bufos.close();}//自定义字节流缓冲区，一次读一个字节public static void copyMp3_MyBufferedInputStream()throws IOException{FileOutputStream fos = new FileOutputStream("E:\\javademo\\day19\\3.mp3");FileInputStream fis = new FileInputStream("E:\\javademo\\day19\\1.mp3");BufferedOutputStream bufos = new BufferedOutputStream(fos);MyBufferedInputStream mybufis = new MyBufferedInputStream(fis);int buf=0;while((buf=mybufis.myRead())!=-1){bufos.write(buf);}mybufis.myClose();bufos.close();}}