RSA加密和解密在java方面工作良好，取模和指数如下：

JavaRSA模和指数：

String nModulusPublic = "AJ+L/dVL9jnRX6IM87H8x2fR24t6wpzBDV7bcgPWblegR0LNK91z/OSX+lSLUgHSKJ9to/Eo8OMsREpNoJlEzI0=";
String eExponentPublic = "AQAB";
String eExponentPrivate = "AIpmE5C9TiAlgYG/Hn5dOlTS9FFv8fWseX65eZPepOUY4ivxN0lOZ+MsugZd03wmKvnxBuCGu5nv2qrUBTPzjcE=";

Java公钥和私钥生成器：

static PublicKey GetPublicKey(String publicKString, String publicExponentStr) throws Exception {
    byte[] modulusBytes = Base64.getDecoder().decode(publicKString);
    byte[] exponentBytes = Base64.getDecoder().decode(publicExponentStr);
    BigInteger modulus = new BigInteger(1, modulusBytes);
    BigInteger exponent = new BigInteger(1, exponentBytes);

    RSAPublicKeySpec rsaPubKey = new RSAPublicKeySpec(modulus, exponent);
    KeyFactory fact = KeyFactory.getInstance("RSA");
    PublicKey pubKey = fact.generatePublic(rsaPubKey);
    return pubKey;
}

static PrivateKey GetPrivateKey(String nModulusPublic, String eExponentPrivate) throws Exception {
    byte[] modulusBytes = Base64.getDecoder().decode(nModulusPublic);
    byte[] exponentBytes = Base64.getDecoder().decode(eExponentPrivate);
    BigInteger modulus = new BigInteger(1, modulusBytes);
    BigInteger exponent = new BigInteger(1, exponentBytes);

    RSAPrivateKeySpec privSpec = new RSAPrivateKeySpec(modulus, exponent);
    KeyFactory fact = KeyFactory.getInstance("RSA");
    PrivateKey privKey = fact.generatePrivate(privSpec);
    return privKey;
}

我在c#中使用nModulusPublic和eExponentPublic在Java加密和解密，但不起作用。在RSA. Encrypt（text Bytes，true）上工作；c#函数中的参数将其更改为false和RSAEncryptionPadding.Pkcs1，但不起作用。当我在java中使用c#Encrypt函数的结果来解密时，它总是遇到这个错误：

javax.crypto.IllegalBlockSizeException: Data must not be longer than 64 bytes

C#加密函数：

static string Encrypt(string text)
    {
        string outputB64 = string.Empty;
        byte[] textBytes = Encoding.UTF8.GetBytes(text);

        RSAParameters result = new RSAParameters()
        {
            Modulus = Convert.FromBase64String(nModulusPublic),
            Exponent = Convert.FromBase64String(eExponentPublic)
        };

        using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider())
        {
            RSA.ImportParameters(result);
            byte[] encryptedData = RSA.Encrypt(textBytes, true);
            outputB64 = Convert.ToBase64String(encryptedData);
        }          
        
        return outputB64;
    }

额外信息，Java加密和解密主要功能：

 static String Decrypt(String encodedString,PrivateKey privKey) {
    try {
        Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
        cipher.init(Cipher.DECRYPT_MODE, privKey);
        byte[] decrypted = cipher.doFinal(Base64.getDecoder().decode(encodedString));
        return new String(decrypted, "UTF-8");
    } catch (Exception err) {
        return err.fillInStackTrace().toString();
    }
}
 static String Encrypt(String encodedString,PublicKey pubKey) {
    try {
        Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
        cipher.init(Cipher.ENCRYPT_MODE, pubKey);
        byte[] plainBytes = new String(encodedString).getBytes("UTF-8");
        byte[] cipherData = cipher.doFinal(plainBytes);
        String encryptedString = Base64.getEncoder().encodeToString(cipherData);
        return encryptedString;
    } catch (Exception err) {
        return err.fillInStackTrace().toString();
    }
}

更新：

我正在研究它，发现java加密函数和c#有两种不同的类型，Java结果总是以“==”结尾，但c#函数最后有一个“=”，似乎这就是问题所在。

C#加密函数结果：

AJiltxqa1/8HU20XZlKJsJvclQ8PyQetpWdbCOpbqrXVg0q
/v4x5tXLxbzGKbO5InvKkib7tDQp+9BU0SYbZLv0=

JavaEncrypt函数结果：

RlarFQBo2mcCWjidQ5l7ho2EOG6KGQWpR3ByXXHsGo6+HRQzmO4v7
TUTMdfB9wjI3aO6quruSReitrWu7QF9Vw==