2.Nacos使用Ribbon

nacos-discovery依赖了ribbon，可以不用再引入ribbon依赖

2) 添加@LoadBalanced注解

@Configuration
public class RestConfig {
    @Bean
    @LoadBalanced
    public RestTemplate restTemplate() {
        return new RestTemplate();
    } 
}

3) 修改controller

@Autowired
private RestTemplate restTemplate;
@RequestMapping(value = "/findOrderByUserId/{id}")
public R  findOrderByUserId(@PathVariable("id") Integer id) {
    // RestTemplate调用
    //String url = "http://localhost:8020/order/findOrderByUserId/"+id;
    //模拟ribbon实现
    //String url = getUri("mall-order")+"/order/findOrderByUserId/"+id;
    // 添加@LoadBalanced
    String url = "http://mall-order/order/findOrderByUserId/"+id;
    R result = restTemplate.getForObject(url,R.class);
    return result;
}