问题记录：No Feign Client for loadBal

引入openfeign时报No Feign Client for loadBalancing defined. Did you forget to include spring-cloud-starter-loadbalancer错误
原因：由于SpringCloud Feign高版本不使用Ribbon而是使用spring-cloud-loadbalancer，所以需要引用spring-cloud-loadbalancer或者降版本

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-loadbalancer</artifactId>
        </dependency>