服务发现Discovery

对于注册进eureka里面的微服务，可以通过服务发现来获得该服务的信息

1、在能够实现服务发现的服务的主启动类上添加如**解：

@EnableDiscoveryClient

2、在服务方增加如下代码进行测试：

@RestController
@Slf4j
public class PaymentController {

    @Resource
    private DiscoveryClient discoveryClient;

    @GetMapping(value = "/payment/discovery")
    public Object discovery(){
        List<String> services = discoveryClient.getServices();
        for(String elem: services){
            System.out.println("element: " + elem);
        }

        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
        for(ServiceInstance instance: instances){
            System.out.println(instance.getServiceId() + "\t" + instance.getHost() + "\t" + instance.getPort()
            + "\t" + instance.getUri() + "\t");
        }

        return this.discoveryClient;
    }
}

3、结果