SpringCloud --- Eureka 服务发现Discovery_discovery 获取client并执行

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）再服务提供者controller中加入

	@Autowired
	private DiscoveryClient client;
	@RequestMapping(value = "/dept/discovery", method = RequestMethod.GET)
	public Object discovery()
	{
		//盘点eureka中的微服务
		List<String> list = client.getServices();
		System.out.println("**********" + list);
 
		//获取某个微服务
		List<ServiceInstance> srvList = client.getInstances("springcloud-demo");
		for (ServiceInstance element : srvList) {
			System.out.println(element.getServiceId() + "\t" + element.getHost() + "\t" + element.getPort() + "\t"
					+ element.getUri());
		}
		return this.client;
	}
 
 
 
 
import org.springframework.cloud.client.discovery.DiscoveryClient;

（2）服务提供者启动类中加入注解   @EnableDiscoveryClient

（3）自测 

• 先要启动EurekaServer
• 再启动服务提供者启动类，需要稍等一会儿
• http://localhost:8001/dept/descovery

（4）修改消费者controller

    private static final String REST_URL_PREFIX = "http://localhost:8001";
  
  // 测试@EnableDiscoveryClient,消费端可以调用服务发现
    @RequestMapping(value = "/consumer/dept/discovery")
    public Object discovery()
    {
        return restTemplate.getForObject(REST_URL_PREFIX + "/dept/discovery", Object.class);
    }

              测试：   localhost/consumer/dept/discovery