求 .NET AES解密方法对应的JAVA代码

[json_wf]

.net代码

public static string AESDecrypt(string cipherString, string str)
        {
            if (string.IsNullOrEmpty(cipherString))
                return string.Empty;
            byte[] cipherText = Convert.FromBase64String(cipherString);
            int length = cipherText.Length;
            SymmetricAlgorithm des = Rijndael.Create();
            des.Key = Convert.FromBase64String(str);
            byte[] iv = new byte[16];
            Buffer.BlockCopy(cipherText, 0, iv, 0, 16);
            des.IV = iv;
            byte[] decryptBytes = new byte[length - 16];
            byte[] passwdText = new byte[length - 16];
            Buffer.BlockCopy(cipherText, 16, passwdText, 0, length - 16);
            using (MemoryStream ms = new MemoryStream(passwdText))
            {
                using (CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Read))
                {
                    cs.Read(decryptBytes, 0, decryptBytes.Length);
                    cs.Close();
                    ms.Close();
                }
            }
            return Encoding.UTF8.GetString(decryptBytes);  
        }