将字节数组转换为字符串的问题

Question

解密方法未能将接收的字节数组转换为字符串

    public String decryptData(String data, SecretKeySpec key) throws Exception{
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.DECRYPT_MODE, key);
    byte[] decodedValue = Base64.decode(data, Base64.DEFAULT);
    byte[] decValue = cipher.doFinal(decodedValue);
    String outputData = new String(decValue, StandardCharsets.US_ASCII);
    Log.d("Log byte:", decodedValue.toString());
    Log.d("Log byte:", decValue.toString());
    Log.d("Log str:", outputData);
}

输出日志：

D/Log byte:: [B@4b0fd32
D/Log byte:: [B@32d3a83
D/Log str:: 

cipher.dofinal（）返回一个空数组，我认为这就是为什么我得到一个空字符串值

Answer 1

我正在使用此方法使用AES方法进行解密。

 private final String characterEncoding = "UTF-8";
private final String cipherTransformation = "AES/CBC/PKCS5Padding";
private final String aesEncryptionAlgorithm = "AES";

public String decrypt(String encryptedText, String key) throws KeyException, GeneralSecurityException, GeneralSecurityException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, IOException {
        byte [] cipheredBytes = Base64.decode(encryptedText, Base64.DEFAULT);
        byte[] keyBytes = getKeyBytes(key);
        return new String (decrypt(cipheredBytes, keyBytes, keyBytes), characterEncoding);
    }