报错：java.lang.AbstractMethodError: org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerClient.choose(Ljava/lang/String;Lorg/springframework/cloud/client/loadbalancer/Request;)Lorg/spring

会出现这个问题是导入 spring-cloud-loadbalancer后nacos中 pring-cloud-starter-netflix-ribbon会与它冲突，造成loadbalanc包失效

所以在common的pom文件中剔除掉nacos中的spring-cloud-starter-netflix-ribbon

<dependency>
   <groupId>com.alibaba.cloud</groupId>
   <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
   <exclusions>
      <exclusion>
         <groupId>org.springframework.cloud</groupId>
         <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
      </exclusion>
   </exclusions>
</dependency>