private static CloseableHttpClient getHttpClient() {

        RegistryBuilder<ConnectionSocketFactory> registryBuilder = RegistryBuilder.<ConnectionSocketFactory>create();

        ConnectionSocketFactory plainSF = new PlainConnectionSocketFactory();

        registryBuilder.register("http", plainSF);

        //指定信任密钥存储对象和连接套接字工厂

        try {

            KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());

            //信任任何链接

            TrustStrategy anyTrustStrategy = new TrustStrategy() {

                @Override

                public boolean isTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {

                    return true;

                }

            };

            SSLContext sslContext = SSLContexts.custom().useTLS().loadTrustMaterial(trustStore, anyTrustStrategy).build();

            LayeredConnectionSocketFactory sslSF = new SSLConnectionSocketFactory(sslContext, SSLConnectionSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);

            registryBuilder.register("https", sslSF);

        } catch (KeyStoreException e) {

            throw new RuntimeException(e);

        } catch (KeyManagementException e) {

            throw new RuntimeException(e);

        } catch (NoSuchAlgorithmException e) {

            throw new RuntimeException(e);

        }

        Registry<ConnectionSocketFactory> registry = registryBuilder.build();

        //设置连接管理器

        PoolingHttpClientConnectionManager connManager = new PoolingHttpClientConnectionManager(registry);

//        connManager.setDefaultConnectionConfig(connConfig);

//        connManager.setDefaultSocketConfig(socketConfig);

        //构建客户端

        return HttpClientBuilder.create().setConnectionManager(connManager).build();

    }