Java 클라이언트는 자체 서명된 SSL 인증서를 어떻게 처리할 수 있습니까?

<JAVA_HOME>\bin\keytool -import -v -trustcacerts \
  -alias server-alias -file server.cer \
  -keystore cacerts.jks -keypass changeit \
  -storepass changeit

TrustManager[] trustAllCerts = new TrustManager[] {
    new X509TrustManager() {
        public X509Certificate[] getAcceptedIssuers() { return new X509Certificate[0]; }

        public void checkClientTrusted(X509Certificate[] certs, String authType) { }

        public void checkServerTrusted(X509Certificate[] certs, String authType) { }
    }
};

// Install the trust manager
SSLContext sc = SSLContext.getInstance("SSL");
sc.init(null, trustAllCerts, new java.security.SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());

URL url = new URL("https://hostname/index.html");