如何在Jmeter中使用Java加载公钥？

import java.io.FileInputStream;
import java.security.KeyStore;
import java.security.PublicKey;
import java.security.cert.Certificate;

public class PublicKeyLoader {
    public static PublicKey loadPublicKey(String publicKeyPath, String keyStoreType, String keyStorePassword, String alias) throws Exception {
        FileInputStream fis = new FileInputStream(publicKeyPath);
        KeyStore keyStore = KeyStore.getInstance(keyStoreType);
        keyStore.load(fis, keyStorePassword.toCharArray());
        Certificate cert = keyStore.getCertificate(alias);
        return cert.getPublicKey();
    }
}

import com.example.PublicKeyLoader;

String publicKeyPath = "/path/to/public/key";
String keyStoreType = "JKS";
String keyStorePassword = "password";
String alias = "alias";

PublicKey publicKey = PublicKeyLoader.loadPublicKey(publicKeyPath, keyStoreType, keyStorePassword, alias);