Spring Cloud Feign
https://blog.csdn.net/kangkanglou/article/details/76407623
https://blog.csdn.net/neosmith/article/details/52449921
==========
OAuth2FeignRequestInterceptor
<dependency>
<groupId>com.netflix.feign</groupId>
<artifactId>feign-okhttp</artifactId>
<version>8.18.0</version>
</dependency>
https://github.com/sdcuike/spring-boot-oauth2-demo
https://segmentfault.com/a/1190000009821815
https://www.baidu.com/s?wd=requestinterceptor%20feignclient&pn=10&oq=requestinterceptor%20feignclient&tn=94296483_hao_pg&ie=utf-8&rsv_pq=87ed8f0900015376&rsv_t=50e2o3lWGiIkMl%2BTGiaNQvb1NuShIqjvS4FNUGbWv%2Fqhn4XUhAG8YVKIjT0Yg9%2BmYmAWlp%2Fp&rsv_page=1
Author:LuffyStory
Origin:http://www.cnblogs.com/luffystory/