Java-IO：复制文件

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class CopyFileDemo {
    public static void main(String[] args) {

        FileInputStream fis = null;
        FileOutputStream fos = null;
        try {
            fis = new FileInputStream("js.mp3");
            fos = new FileOutputStream("copy_js.mp3");
            // BufferedInputStream bis=new BufferedInputStream(fis);
            // BufferedOutputStream bos=new BufferedOutputStream(fos);
            byte[] bt = new byte[1024];
            int len = 0;
            while ((len = fis.read(bt)) != -1) {
                fos.write(bt, 0, len);
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (fis != null)
                    fis.close();
                if (fos != null)
                    fos.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}