public class OkHttpUtil {

    private OkHttpClient client;

    private X509TrustManager x509TrustManager() {
        return new X509TrustManager() {
            @Override
            public void checkClientTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {}

            @Override
            public void checkServerTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {}

            @Override
            public X509Certificate[] getAcceptedIssuers() {
                return new X509Certificate[0];
            }
        };
    }

    private SSLSocketFactory sslSocketFactory() {
        try {
            SSLContext sslContext = SSLContext.getInstance("TLS");
            sslContext.init(null, new TrustManager[] {x509TrustManager()}, new SecureRandom());
            return sslContext.getSocketFactory();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (KeyManagementException e) {
            e.printStackTrace();
        }
        return null;
    }

    private OkHttpUtil() {
        final String username = "xxx";
        final String password = "yyy";

        Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress("ipAdress", 8080));

        Authenticator proxyAuthenticator = new Authenticator() {
            @Override
            public Request authenticate(Route route, Response response) throws IOException {
                String credential = Credentials.basic(username, password);
                return response.request().newBuilder()
                        .header("Proxy-Authorization", credential)
                        .build();
            }
        };


        client = new OkHttpClient.Builder()
                .addInterceptor(new CommonInterceptor())
                .retryOnConnectionFailure(false)//是否开启缓存
                .connectionPool(pool())//连接池
                .connectTimeout(10L, TimeUnit.SECONDS)
                .readTimeout(10L, TimeUnit.SECONDS)
                .sslSocketFactory(sslSocketFactory(), x509TrustManager())
                .proxy(proxy)
                .proxyAuthenticator(proxyAuthenticator)
                .authenticator(proxyAuthenticator)
                .build();
    }

    // todo 使用client对象进行执行request请求
    // client.newCall(request).execute();
}