我得到了一个url - jwks_uri= https：//xxxxx/oauth/nam/keys
...生成如下JSON：

{
     "keys": [{
             "kty": "RSA",
             "use": "sig",
             "alg": "RS256",
             "kid": "233921010515334582428573459295448396160651486998",
             "x5c": ["MIIFQjCCBCqgAwIBAgIUKPlhgf+gbz7h0arpJdYiOXxj5xYwDQYJKoZIhvcNAQELBQAwNTEaMBgGA1UECxMRT3JnYW5pemF0aW9uYWwgQ0ExFzAVBg..........wTBo45axM="],
             "x5t": "BBSLHq3rpiVLP2rota71boxAdqE",
             "x5tS256": "VAvMs-i58nz5UjOzyOEPpDubjgsNDK_m5z7w8dudPaw",
             "n": "okBvqleqjWLqLQ20cd9oajuOFZgOdPgD0rz6PddT1uW0iPkZ53Az68D_9s0fSMh996iGxN8sZFcCO-v0DXFBmUZb8D1VuBbx4v8Q_OUWhUk6V0QgUnzsdEYP39tZqU4gq KMuwzCbqqD1tj1C510tT8LK8lJjYuIjP-eNHv_WaL9QAH0iRwOWXA_a9ZwEoOhI0R-HqnvvJNyuUnh0umHDow3Uu7uuTKMFmziNzcB4ANBrKytVsfqBz2M9qNi6YqpT1ysGyX_M_PCja 2q8CDQxpcUm7XikFNdjutTR_B1gXDEk0Y8O7MgeKQcbYq1jMGEzIUabeka6jbBE2RR-mzV1YQ",
             "e": "AQAB"
         }
     ]
}

该公司声称我已经拥有了验证jwt公钥所需的一切，但在我的代码中，我不断收到错误
引起的：javax.net.ssl.SSLHandshakeException：PKIX路径构建失败：sun.security.provider.certpath. SunCertPathBuilderException：无法找到有效的证书路径到请求的目标.
这是我的方法：

private RSAPublicKey loadPublicKey(DecodedJWT token) throws JwkException, MalformedURLException {
    
    final String url = "https://XXXXXXXX/oauth/nam/keys"; //getKeycloakCertificateUrl(token);
 //   final String url = "https://XXXXXXXXX/api/GetCA";


    JwkProvider provider = new UrlJwkProvider(new URL(url));

    return (RSAPublicKey) provider.get(token.getKeyId()).getPublicKey();
}