我正在尝试使用windows密钥库中的证书进行api调用
我的代码使用以下结构

//Loading certificate
            KeyStore keyStore  = KeyStore.getInstance("Windows-MY");
            keyStore .load(null, null);
            String alias = "Alias";
            X509Certificate certificate = (X509Certificate)keyStore.getCertificate(alias);
            TrustManagerFactory tmf = TrustManagerFactory
                    .getInstance(TrustManagerFactory.getDefaultAlgorithm());
            //Making a keystore with just the needed certificate
            KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
            ks.load(null);
            ks.setCertificateEntry(alias, certificate);
            tmf.init(ks);
            SSLContext sslContext = SSLContext.getInstance("TLS");
            sslContext.init(null, tmf.getTrustManagers(), null);
            HttpsURLConnection.setDefaultSSLSocketFactory(sslContext.getSocketFactory());
            URL url = new URL("https://SERVER/SERVICE");
            HttpsURLConnection urlConn = (HttpsURLConnection) url.openConnection();
            //I'm getting the exception from below line
            System.out.println(urlConn.getResponseMessage());

我收到“sun.security.validator.validatorexception:pkix路径生成失败：sun.security.provider.certpath.suncertpathbuilderexception:找不到请求目标的有效证书路径”异常
在这一点上我几乎被卡住了。我在网上搜索了几个小时。有人能帮我解决这个问题吗？