MP3拷贝程序---字节流

 package cn.itcast.p7.io.bytestream.test;

 import java.io.BufferedInputStream;
 import java.io.BufferedOutputStream;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;

 public class CopyMp3Test {

     /**
      * @param args
      * @throws IOException
      */
     public static void main(String[] args) throws IOException {

         copy_4();

     }
 //    千万不要用，效率没有！
     public static void copy_4() throws IOException {
         FileInputStream fis = new FileInputStream("c:\\0.mp3");
         FileOutputStream fos = new FileOutputStream("c:\\4.mp3");

         int ch = 0;

         while((ch =fis.read())!=-1){
             fos.write(ch);
         }

         fos.close();
         fis.close();
     }

     //不建议。
     public static void copy_3() throws IOException {
         FileInputStream fis = new FileInputStream("c:\\0.mp3");
         FileOutputStream fos = new FileOutputStream("c:\\3.mp3");

         byte[] buf = new byte[fis.available()];
         fis.read(buf);
         fos.write(buf);
         fos.close();
         fis.close();
     }

     public static void copy_2() throws IOException {

         FileInputStream fis = new FileInputStream("c:\\0.mp3");
         BufferedInputStream bufis = new BufferedInputStream(fis);

         FileOutputStream fos = new FileOutputStream("c:\\2.mp3");
         BufferedOutputStream bufos = new BufferedOutputStream(fos);

         int ch = 0;

         while((ch=bufis.read())!=-1){
             bufos.write(ch);
         }

         bufos.close();
         bufis.close();
     }

     public static void copy_1() throws IOException {

         FileInputStream fis = new FileInputStream("c:\\0.mp3");
         FileOutputStream fos = new FileOutputStream("c:\\1.mp3");

         byte[] buf = new byte[1024];

         int len = 0;

         while((len=fis.read(buf))!=-1){
             fos.write(buf,0,len);
         }

         fos.close();
         fis.close();
     }

 }