将hmac函数从python转换为Java

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.util.Base64;

public class HmacConverter {
    public static String calculateHmac(String message, String key) throws NoSuchAlgorithmException, InvalidKeyException {
        Mac mac = Mac.getInstance("HmacSHA256");
        SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes(), "HmacSHA256");
        mac.init(secretKeySpec);
        byte[] hmacBytes = mac.doFinal(message.getBytes());
        return Base64.getEncoder().encodeToString(hmacBytes);
    }

    public static void main(String[] args) {
        try {
            String message = "Hello World";
            String key = "SecretKey";
            String hmac = calculateHmac(message, key);
            System.out.println("HMAC: " + hmac);
        } catch (NoSuchAlgorithmException | InvalidKeyException e) {
            e.printStackTrace();
        }
    }
}