public class CopyFile {

	public static void main(String[] args) throws IOException {
		if (args.length != 2) {
			System.err.println("Usage:\n  java CopyFile.java <source> <target>");
			System.exit(1);
		}
		copy(args[0], args[1]);
	}

	static void copy(String source, String target) throws IOException {
		// 友情提示：测试时请使用无关紧要的文件
		// TODO:
		byte[] buffer = new byte[10];
		try (InputStream is = new FileInputStream(source); OutputStream os = new FileOutputStream(target, true)) {
			int i;
			while ((i = is.read(buffer)) != -1) {
				
				System.out.println(new String(buffer, "UTF-8"));
				os.write(buffer);
				buffer = new byte[10];
			}
		}
	}
}