2.Eureka服务发现Discovery

构建步骤
在服务控制器Controller中注入

/**
  * 服务发现 获取服务信息
  */
@Resource
private DiscoveryClient discoveryClient;
 /**
 * 服务发现
 * @return
 */
@GetMapping("payment/discovery")
public Object discovery(){
    List<String> services=discoveryClient.getServices();
    for (String element :services){
        log.info("element："+element);
    }
    //一个微服务下的全部实例
    List<ServiceInstance> serviceInstanceList=discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
    for (ServiceInstance instance : serviceInstanceList){
        log.info(instance.getServiceId() + "\t" + instance.getHost() + "\t" + instance.getPort() + "\t" + instance.getUri());
    }
    return this.discoveryClient;

最后在该服务启动类上添加@EnableDiscoveryClient注解即可