Test.groovy

import org.apache.commons.codec.binary.Hex
import org.apache.commons.codec.digest.HmacUtils

import javax.crypto.Mac
import javax.crypto.spec.SecretKeySpec
import java.nio.charset.StandardCharsets

def key =
        "0x9B7A8A71592A41F4C935A159768E7771AF4F814CA7DDAC80491A355B072090CF7A3D26DCBD7123C26A1134D291FD5044355B1F124D7127902693F85921545F20109D52472A1E0F0D3E0069357FA7000C2CDA1EEAAADF5B81046687472DC8CA730DC3AD0C0359B7ED2F04398FAD8FE3C47881D5AA82BA065D969C931CBE2B92A4"

try {
    // first approach
    def result = new HmacUtils(org.apache.commons.codec.digest.HmacAlgorithms.HMAC_SHA_512, key).hmacHex("P@ssword_1234")
    println result

    // second approach
    Mac sha512Hmac = Mac.getInstance("HmacSHA512");
    final byte[] byteKey = key.getBytes(StandardCharsets.UTF_8);
    SecretKeySpec keySpec = new SecretKeySpec(byteKey, "HmacSHA512");

    sha512Hmac.init(keySpec);
    byte[] macData = sha512Hmac.doFinal("P@ssword_1234".getBytes(StandardCharsets.UTF_8));
    result = Hex.encodeHexString(macData)
    println result
} catch (final Exception e) {
    e.printStackTrace();
}