版权声明：【show me the code ,change the world】 https://blog.csdn.net/yangshangwei/article/details/85042142
版本说明
先说下使用的spring cloud和spring boot的版本
Disable HystrixCommands For FeignClients By Default
https://github.com/spring-cloud/spring-cloud-netflix/issues/1277
新建子module
父工程microservice-spring-cloud右键新建Maven Module 命名为：micorservice-consumer-movie-feign-hystrix ,为了简单我们把micorservice-consumer-movie-feign的内容copy到该子模块,修改下application.yml中的spring.application.name即可。
application.yml中开启Hystrix
server:
port: 7901
spring:
application:
name: micorservice-consumer-movie-feign-hystrix
#eureka
eureka:
client:
service-url:
defaultZone: http://artisan:artisan123@localhost:8761/eureka
instance:
prefer-ip-address: true
instance-id: ${spring.application.name}:${spring.application.instance_id:${server.port}}
# Disable HystrixCommands For FeignClients By Default
# https://github.com/spring-cloud/spring-cloud-netflix/issues/1277
feign:
hystrix:
enabled: true
如果是application.property ，请设置 feign.hystrix.enabled=true
修改Feign接口
使用fallback属性指定回退类
回退类 也需要实现上面的接口，同时需要标注@Component让其成为受spring管理的bean
测试
- 启动microservice-discovery-eureka，注册中心
- 启动micorservice-provider-user，服务提供者
- 启动micorservice-consumer-movie-feign-hystrix，服务消费者开启了Hystrix
访问http://localhost:8761/ 确认下服务已经注册成功。
访问 http://localhost:7901/movie/1
{"id":1,"username":"artisan1","name":"小工匠一","age":10,"balance":100.00}
功能正常，OK。
现在停掉micorservice-provider-user
访问 http://localhost:7901/movie/1 ，进入了回退方法
{"id":1,"username":"默认用户","name":null,"age":null,"balance":null}
再次启动 micorservice-provider-user
再次访问 http://localhost:7901/movie/1
{"id":1,"username":"artisan1","name":"小工匠一","age":10,"balance":100.00}
功能正常，OK。