用JAVA实现的AES算法，可对文件，字符串，byte数组加密，详细显示每一步加密过程,包含生成密匙,加密文件,用密钥k解密文件-AES algorithm using JAVA, may file a string, byte array encryption, the encryption process every step shown in detail, including key generation, encryption, file with the key k to decry