java.security.NoSuchAlgorithmException:没有这样的算法: ECDSA for provider BC

<dependency>
    <groupId>org.bouncycastle</groupId>
    <artifactId>bcprov-jdk15on</artifactId>
    <version>1.69</version>
</dependency>

dependencies {
    implementation 'org.bouncycastle:bcprov-jdk15on:1.69'
}

import org.bouncycastle.jce.provider.BouncyCastleProvider;
import java.security.Security;

public class Main {
    public static void main(String[] args) {
        // 注册BouncyCastle提供者
        Security.addProvider(new BouncyCastleProvider());

        // 现在可以使用ECDSA算法了
        try {
            KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("ECDSA", "BC");
            keyPairGenerator.initialize(256);
            KeyPair keyPair = keyPairGenerator.generateKeyPair();
            System.out.println("KeyPair generated successfully.");
        } catch (NoSuchAlgorithmException | NoSuchProviderException e) {
            e.printStackTrace();
        }
    }
}