public static void main(String []args) throws IOException{
        File f1 = new File("d:\\专业 pro\\哈哈 world.txt");
        FileInputStream fis;
        fis = new FileInputStream(f1);
        byte[] bytIn = new byte[(int) f1.length()];
        for (int i = 0; i < f1.length(); i++) {
            bytIn[i] = (byte) fis.read();
            System.out.println(bytIn[i]);
        }
    }