文件的拷贝

public static void main(String[] args) throws IOException {
		File f1=new File("D:\\韩顺平.linux视频教程第0讲.开山篇.wmv");
		File f2=new File("E:\\韩顺平.linux视频教程第0讲.开山篇.wmv");
		InputStream input=new FileInputStream(f1);
		OutputStream output=new FileOutputStream(f2);
		DataInputStream is=new DataInputStream(input);
		DataOutputStream os=new DataOutputStream(output);
		int len=-1;
		byte[] buffer = new byte[4096];
		while((len=is.read(buffer))!=-1){
			os.write(buffer, 0, len);
		}
		input.close();
		output.close();
		is.close();
		os.close();
	}