<!--loadbalancer-->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-loadbalancer</artifactId>
</dependency>

public static final String PaymentSrv_URL = "http://cloud-payment-service";//服務注冊中心上的微服務名稱
@GetMapping(value = "/consumer/pay/get/info")
private String getInfoByConsul(){
   return restTemplate.getForObject(PaymentSrv_URL + "/pay/get/info", String.class);
}

@Configuration
public class RestTemplateConfig {
    @Bean
    @LoadBalanced //按服務名稱調用時默認負載均衡 要加上該注解支持負載均衡
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }
}

@Configuration
@LoadBalancerClient(
        //下面的value值大小寫一定要和consul里面的名字一樣，必須一樣
        value = "cloud-payment-service",configuration = RestTemplateConfig.class)
public class RestTemplateConfig
{
    @Bean
    @LoadBalanced //使用@LoadBalanced注解賦予RestTemplate負載均衡的能力
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }

    @Bean
    ReactorLoadBalancer<ServiceInstance> randomLoadBalancer(Environment environment,
                                                            LoadBalancerClientFactory loadBalancerClientFactory) {
        String name = environment.getProperty(LoadBalancerClientFactory.PROPERTY_NAME);

        return new RandomLoadBalancer(loadBalancerClientFactory.getLazyProvider(name, ServiceInstanceListSupplier.class), name);
    }
}