【服务中心】集群，Eureka Server

【服务提供者】集群，Eureka Client

【服务消费者】，Eureka Discovery Client(Feign)
3.1 pom文件:

 <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-web</artifactId>
 </dependency>
 <dependency>
     <groupId>org.springframework.cloud</groupId>
     <artifactId>spring-cloud-starter-openfeign</artifactId>
 </dependency>
 <dependency>
     <groupId>org.springframework.cloud</groupId>
     <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
 </dependency>

3.2 启动类&&Service层&&控制层

启动类:

 @SpringBootApplication
 @EnableFeignClients         //启动Feign
 @EnableDiscoveryClient      //启动Eureka服务发现
 public class EurekaFeignApplication {
     public static void main(String[] args) {
         SpringApplication.run(EurekaFeignApplication.class, args);
     }
 }

Service层:

 @FeignClient(value = "eureka-client")   //调用的服务名称
 public interface EurekaFeignService {
     @RequestMapping("/info")
     String getInfo();
 }

控制层:

 @RestController
 public class EurekaFeignController {
     @Resource
     private EurekaFeignService eurekaFeignService;
     @RequestMapping("/feignInfo")
     public String feignInfo() {
         String message = eurekaFeignService.getInfo();
         return "获取的信息:  " + message;
     }
 }

3.3 配置文件yml

 server:
   port: 52620
 spring:
   application:
     name: eureka-discovery-feign
 eureka:
   instance:
     hostname: localhost
     lease-renewal-interval-in-seconds: 5
     lease-expiration-duration-in-seconds: 10
   client:
     service-url:
       defaultZone:  http://localhost:8081/eureka,http://localhost:8082/eureka,http://localhost:803/eureka

启动【服务消费者】工程

访问服务中心,查看注册实例

访问地址http://localhost:52620/feignInfo，多刷新几次，查看变化
【服务消费者】完成！！！