如何以编程方式创建新的KeyStore？

import java.io.FileOutputStream;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.KeyStore;
import java.security.cert.Certificate;
import java.security.cert.X509Certificate;

public class CreateKeyStore {
    public static void main(String[] args) throws Exception {
        // 生成密钥对
        KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
        keyPairGenerator.initialize(2048);
        KeyPair keyPair = keyPairGenerator.generateKeyPair();

        // 创建自签名证书
        X509Certificate certificate = SelfSignedCertificate.generate(keyPair, "CN=example.com", "SHA256withRSA");

        // 创建新的KeyStore
        KeyStore keyStore = KeyStore.getInstance("JKS");
        keyStore.load(null, null);

        // 添加密钥对和证书到KeyStore
        keyStore.setKeyEntry("alias", keyPair.getPrivate(), "password".toCharArray(), new Certificate[]{certificate});

        // 保存KeyStore到文件
        try (FileOutputStream fos = new FileOutputStream("keystore.jks")) {
            keyStore.store(fos, "keystore-password".toCharArray());
        }
    }
}