OkHttpClient调用接口方式

OkHttpClient client = new OkHttpClient();

                MediaType mediaType = MediaType.parse("application/json");
                RequestBody body = RequestBody.create(mediaType,"json字串");
                Request request2 = new Request.Builder()
                        .url("接口请求地址")
                        .post(body)
                        .addHeader("Content-Type", "application/json")
                        .addHeader("cache-control", "no-cache")
                        .addHeader("Postman-Token", "77179e47-ec95-4af0-9e9d-94973220808e")
                        .build();
                Response response2 = client.newCall(request2).execute();