public ShopOrder order(@PathVariable("pid") Long pid) {
        log.info("客戶下單，這時候要調用商品微服務查詢商品信息。。。");
        //從nacos中獲取服務地址
        List<ServiceInstance> instances = discoveryClient.getInstances("shop-product");
        //自定義規(guī)則實現(xiàn)隨機挑選服務
        int index = new Random().nextInt(instances.size());
        ServiceInstance serviceInstance = instances.get(index);
        String url = serviceInstance.getHost()+":"+serviceInstance.getPort();
        log.info(">>從nacos中獲取到的微服務地址為:"+ url);
        //通過restTemplate調用商品微服務
        ShopProduct shopProduct = restTemplate.getForObject("http://"+url+"/product/"+pid, ShopProduct.class);
        log.info("當前用戶信息為自己，假設我們設置為1");
        ShopOrder shopOrder = new ShopOrder();
        shopOrder.setUid(1L);
        shopOrder.setUsername("公眾號：阿Q說代碼");
        shopOrder.setPid(shopProduct.getId());
        shopOrder.setPname(shopProduct.getPname());
        orderService.save(shopOrder);
        //商品扣減庫存的邏輯
        ProductReduceDTO productReduceDTO = new ProductReduceDTO();
        productReduceDTO.setProductId(pid);
        productReduceDTO.setReductCount(1);
        Integer count = restTemplate.postForObject("http://"+url+"/product/reduceStock", productReduceDTO, Integer.class);
        return shopOrder;
    }

@Bean
@LoadBalanced
 public RestTemplate getRestTemplate() {
     return new RestTemplate();
 }

//從nacos中獲取服務地址
//自定義規(guī)則實現(xiàn)隨機挑選服務
//List<ServiceInstance> instances = discoveryClient.getInstances("shop-product");
//int index = new Random().nextInt(instances.size());
//ServiceInstance serviceInstance = instances.get(index);
//String url = serviceInstance.getHost()+":"+serviceInstance.getPort();
//直接使用微服務名字，從nacos中獲取服務地址
String url="shop-product";

# 負載均衡規(guī)則
shop-product:
  ribbon:
    NFLoadBalancerRuleClassName: com.netflix.loadbalancer.RandomRule

 @Bean
 public IRule randomRule(){
     return new RandomRule();
 }

ribbon:
  eager-load:
    clients:
      - shop-product