<!-- 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(jī)選擇一個(gè)server
//    return new BestAvailableRule(); //分配策略：選擇一個(gè)最小的并發(fā)請(qǐng)求的server，逐個(gè)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(duì)應(yīng)位置的server
//    return new WeightedResponseTimeRule(); //分配策略：根據(jù)響應(yīng)時(shí)間分配一個(gè)weight(權(quán)重)，響應(yīng)時(shí)間越長(zhǎng)，weight越小，被選中的可能性越低
//    return new ZoneAvoidanceRule(); //分配策略：復(fù)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(duì)選定的負(fù)載均衡策略機(jī)上重試機(jī)制，在一個(gè)配置時(shí)間段內(nèi)當(dāng)選擇server不成功，則一直嘗試使用subRule的方式選擇一個(gè)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(diào)用
   */
  @GetMapping("feign/ribbon")
  String ribbon(){
    return myspringbootFeign.ribbon();
  }