Boa tarde

Amigos, estou tentando mandar uma nfe usando código abaixo:

Aparentemente meus certificados estão instalados pois mando tb sped reinf onde gera e assina xml e não da erro.

Erro: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target; nested exception is javax.net.ssl.SSLHandshakeException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

Agradeço desde de já.

KeyStore clientStore = KeyStore.getInstance("PKCS12");
            clientStore.load(new FileInputStream("/discos/teste.pfx"), "99999".toCharArray());
            SSLContextBuilder sslContextBuilder = new SSLContextBuilder();
            sslContextBuilder.loadKeyMaterial(clientStore, "99999".toCharArray());
            sslContextBuilder.loadTrustMaterial(new TrustSelfSignedStrategy());
            SSLConnectionSocketFactory sslConnectionSocketFactory = new SSLConnectionSocketFactory(
                    sslContextBuilder.build());
            CloseableHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(sslConnectionSocketFactory)
                    .build();

            HttpComponentsClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactory(
                    httpClient);
            requestFactory.setConnectTimeout(10000); // 10 seconds
            requestFactory.setReadTimeout(10000); // 10 seconds
             
            RestTemplate restTemplate = new RestTemplate(requestFactory);

            XMLSignatureFactory fac = XMLSignatureFactory.getInstance("DOM");

            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
            Document document = dbf.newDocumentBuilder().parse(new FileInputStream("/nfe/" + "A-9999.xml"));

            String arquivoXML = converter(document);
            
            Envelopar envelopar = new Envelopar();
            
            String arquivoXML2 = envelopar.EnveloparXML();
             
            String resourceUrl = "https://homologacao.nfe.fazenda.sp.gov.br/ws/nfeautorizacao4.asmx";
            //String resourceUrl = "https://reinf.receita.economia.gov.br/recepcao/lotes";
            
            String retornoEnvio = "";

            HttpHeaders headers = new HttpHeaders();
            headers.add("Content-Type", "application/xml; charset=utf-8");

            try {
 
                HttpEntity<String> entity = new HttpEntity<String>(arquivoXML2, headers);

                ResponseEntity<String> response = restTemplate.exchange(resourceUrl, HttpMethod.POST, entity,String.class);

                retornoEnvio = response.getBody();

                retornoJson = XML.toJSONObject(retornoEnvio);
                                
                if (response.getStatusCode() == HttpStatus.OK) {
                    System.out.println("Request Successful.");
                } else if (response.getStatusCode() == HttpStatus.CREATED) {

                    System.out.println(response.getStatusCode() == HttpStatus.CREATED) ;
 
 
                } else {

                    System.out.println("Request Failed");
                
                }
                 

            } catch (Exception e) {
                // TODO: handle exception
                
                
                retornoEnvio = e.getMessage();

                System.out.println(e.getMessage());
        }
        
        return retornoMensagem.toString();

    }