<!-- Ribbon -->
    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
    </dependency>

@EnableEurekaClient
@RibbonClient(name = "RibbonConfig", configuration = RibbonConfig.class)
@SpringBootApplication
public class SpringbootSpringdataJpaApplication{

  public static void main(String[] args) {
    SpringApplication.run(SpringbootSpringdataJpaApplication.class, args);
  }
}

@Configuration
class RibbonConfig {

  @Bean
  public IRule ribbonRule(){
    return new RandomRule(); //分配策略：隨機選擇一個server
//    return new BestAvailableRule(); //分配策略：選擇一個最小的并發(fā)請求的server，逐個考察Server，如果Server被tripped了，則忽略
//    return new RoundRobinRule(); //分配策略：輪詢選擇，輪詢index，選擇index對應位置的server
//    return new WeightedResponseTimeRule(); //分配策略：根據(jù)響應時間分配一個weight(權重)，響應時間越長，weight越小，被選中的可能性越低
//    return new ZoneAvoidanceRule(); //分配策略：復合判斷server所在區(qū)域的性能和server的可用性選擇server
//    return new RetryRule(); //分配策略：對選定的負載均衡策略機上重試機制，在一個配置時間段內當選擇server不成功，則一直嘗試使用subRule的方式選擇一個可用的server
  }

  @Bean
  public IPing ribbonPing() {
    return new PingUrl();
  }

  @Bean
  public ServerListSubsetFilter serverListFilter() {
    ServerListSubsetFilter filter = new ServerListSubsetFilter();
    return filter;
  }

}

@RestController
@RequestMapping("/user")
public class UserController {

  @RequestMapping("/ribbon")
  public String ribbon() {
    return "springdatejpa -- 我的端口是：10088";
  }

}

@FeignClient(name = "springdatejpa", path = "/user/")
public interface MyspringbootFeign {

  @RequestMapping("/ribbon")
  String ribbon();
}

/**
   * feign調用
   */
  @GetMapping("feign/ribbon")
  String ribbon(){
    return myspringbootFeign.ribbon();
  }