序

okhttp在android开发当中非常流行，对比restTemplate来说，相对简洁一点，这里简单介绍下怎么在springboot中配置。

maven

        <!--okhttp3-->
        <dependency>
            <groupId>com.squareup.okhttp3</groupId>
            <artifactId>okhttp</artifactId>
            <version>3.8.1</version>
        </dependency>

配置超时时间

@Bean
    public OkHttpClient okHttpClient() {
        OkHttpClient.Builder builder = new OkHttpClient.Builder();
            builder.connectTimeout(30, TimeUnit.SECONDS)
                    .readTimeout(30, TimeUnit.SECONDS)
                    .writeTimeout(30,TimeUnit.SECONDS)
                    .retryOnConnectionFailure(true);
        return builder.build();
    }

配置https

@Bean
    public OkHttpClient okHttpClient() {
        OkHttpClient.Builder builder = new OkHttpClient.Builder();
            builder.connectTimeout(30, TimeUnit.SECONDS)
                    .readTimeout(30, TimeUnit.SECONDS)
                    .writeTimeout(30,TimeUnit.SECONDS)
                    .retryOnConnectionFailure(true)
                    .sslSocketFactory(getTrustedSSLSocketFactory())
                    .hostnameVerifier(DO_NOT_VERIFY);
        return builder.build();
    }

    TrustManager[] trustAllCerts = new TrustManager[]{
            new X509TrustManager() {
                public java.security.cert.X509Certificate[] getAcceptedIssuers() {
                    X509Certificate[] x509Certificates = new X509Certificate[0];
                    return x509Certificates;
                }

                public void checkClientTrusted(
                        java.security.cert.X509Certificate[] certs, String authType) {
                }

                public void checkServerTrusted(
                        java.security.cert.X509Certificate[] certs, String authType) {
                }
            }
    };

    HostnameVerifier DO_NOT_VERIFY = new HostnameVerifier() {
        @Override
        public boolean verify(String hostname, SSLSession session) {
            return true;
        }
    };

    private SSLSocketFactory getTrustedSSLSocketFactory() {
        try {
            SSLContext sc = SSLContext.getInstance("SSL");
            sc.init(null, trustAllCerts, new java.security.SecureRandom());
            return sc.getSocketFactory();
        } catch (KeyManagementException | NoSuchAlgorithmException e) {
            e.printStackTrace();
            return null;
        }
    }

配置interceptor

@Bean
    public OkHttpClient okHttpClient() {
        OkHttpClient.Builder builder = new OkHttpClient.Builder();
            builder.connectTimeout(30, TimeUnit.SECONDS)
                    .readTimeout(30, TimeUnit.SECONDS)
                    .writeTimeout(30,TimeUnit.SECONDS)
                    .retryOnConnectionFailure(true)
                    .addInterceptor(new Interceptor() {
                        @Override
                        public Response intercept(Chain chain) throws IOException {
                            Request originalRequest = chain.request();
                            Request requestWithUserAgent = originalRequest.newBuilder()
                                    .header(USER_AGENT_HEADER_NAME, CUSTOM_USER_AGENT)
                                    .build();
                            return chain.proceed(requestWithUserAgent);
                        }
                    });
        return builder.build();
    }

doc

• spring-boot-starter-okhttp3