https://blog.csdn.net/weixin_51626435/article/details/115012925
Feign api 抽取：
https://blog.csdn.net/m0_62520968/article/details/127187885
Receiver class org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerCl：
https://blog.csdn.net/bengsong5602/article/details/116035472
https://www.cnblogs.com/HypoPine/p/16670803.html
- AbstractMethodError springframework RibbonLoadBal Receiver netflixabstractmethoderror springframework ribbonloadbal ribbonloadbal receiver abstractmethoderror sender-receiver abstractmethoderror错误tomcat filter sender-receiver client-server difference interface documentbuilderfactory abstractmethoderror setfeature netflix 计算机网络receiver lab2 144