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前言
在SpringCloud中，Ribbon可以实现服务调用和负载均衡，而OpenFeign基于注解加接口的服务调用方式比Ribbon看起来更加简洁，那我们在使用OpenFeign实现服务调用时，如何修改负载均衡策略呢？
一、如何实现
其实OpenFeign也是默认使用了负载均衡组件Ribbon，所以我们直接设置Ribbon的负载均衡策略。
二、实现步骤
1. 创建一个配置类来把选择的负载均衡策略注册进容器
代码如下：
@Configuration public class MyRuleConfig { @Bean @LoadBalanced public IRule
myRule(){ return new RandomRule(); } }
Ribbon自带的七种负载均衡策略：
我们这儿使用的是随机，默认为轮询
2. 主启动类添加注解
代码如下：
@SpringBootApplication(excludeName = "MyRuleConfig") @EnableFeignClients
@RibbonClient(name = "CLOUD-PAYMENT-SERVICE",configuration =
MyRuleConfig.class) public class OrderFeignMain80 { public static void
main(String[] args) { SpringApplication.run(OrderFeignMain80.class, args); } }
首先就是要排除自己创建的配置类。
然后添加@RibbonClient注解，可以覆盖掉默认的策略，name为服务名称，configuration为自己创建的配置类。
总结
其他策略包括自己实现的策略都是这个方法，其实和Ribbon单独实现服务调用与负载均衡的时候是一样的。
