參考文件:https://www.cnblogs.com/xbzhu/p/7064642.html

前幾天對接Java介面，需要C#加密引數，Java解密。奈何網上找了一堆大同小異的加解密方法都跟Jaca加密的密文不一致，Java介面也無法解密，直到看見上面連結的第二種方法。能夠正常的解密Java加密的密文，說明此方法有效，但這裡只有解密，我需要的是加密方法(伸手黨做習慣了)，沒辦法讀讀程式碼看看是怎麼解密的，巧了看到了 CreateDecryptor 改一下 試一下解密 跟Java完全一致 成功！感謝博主！

這是參考文件的博主寫的Demo:https://github.com/zhu-xb/AES-Cryptography

    /// <summary>
    /// AES解密
    /// </summary>
    /// <param name="data"></param>
    /// <param name="key"></param>
    /// <returns></returns>
    public static string AESDecrypt(string content, string key)
    {
        KeyGenerator kgen = KeyGenerator.getInstance("
 
AES");
        SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
        secureRandom.setSeed(Encoding.ASCII.GetBytes(key));
        kgen.init(128, secureRandom);
        SecretKey secretKey = kgen.generateKey();
        byte[] enCodeFormat = secretKey.getEncoded();

        using
 
 (AesCryptoServiceProvider aesProvider = new AesCryptoServiceProvider())
        {
            aesProvider.Key = enCodeFormat;
            aesProvider.Mode = CipherMode.ECB;
            aesProvider.Padding = PaddingMode.PKCS7;
            using (ICryptoTransform cryptoTransform = aesProvider.CreateDecryptor())
            {
                byte[] inputBuffers = Convert.FromBase64String(content);
                byte[] results = cryptoTransform.TransformFinalBlock(inputBuffers, 0, inputBuffers.Length);
                aesProvider.Clear();
                return Encoding.UTF8.GetString(results);
            }
        }
    }

 /// <summary>
    /// AES加密
    /// </summary>
    /// <param name="data"></param>
    /// <param name="key"></param>
    /// <returns></returns>
    public static string AESEncrypt(string content, string key)
    {
        KeyGenerator kgen = KeyGenerator.getInstance("AES");
        SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
        secureRandom.setSeed(Encoding.ASCII.GetBytes(key));
        kgen.init(128, secureRandom);
        SecretKey secretKey = kgen.generateKey();
        byte[] enCodeFormat = secretKey.getEncoded();

        using (AesCryptoServiceProvider aesProvider = new AesCryptoServiceProvider())
        {
            aesProvider.Key = enCodeFormat;
            aesProvider.Mode = CipherMode.ECB;
            aesProvider.Padding = PaddingMode.PKCS7;
            using (ICryptoTransform cryptoTransform = aesProvider.CreateEncryptor())
            {
                byte[] inputBuffers = Encoding.UTF8.GetBytes(content);
                byte[] results = cryptoTransform.TransformFinalBlock(inputBuffers, 0, inputBuffers.Length);
                aesProvider.Clear();
                return Convert.ToBase64String(results);
            }
        }
    }

再次感謝博主 朱小波 https://www.cnblogs.com/xbzhu/