<dependencies><dependency><groupId>cn.kgc</groupId><artifactId>eureka-common-school</artifactId><version>1.0-SNAPSHOT</version></dependency><!--@EnableDiscoveryClient--><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-netflix-eureka-client</artifactId></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-netflix-hystrix</artifactId></dependency><!--@EnableHystrixDashboard--><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId></dependency><!--@EnableCircuitBreaker--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency><!--@EnableFeignClients--><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-openfeign</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency></dependencies>

server.port=8765
spring.application.name=hystrix-dashboard
eureka.client.serviceUrl.defaultZone=http://localhost:8761/eureka/
# 将feign集成的断路器设置成有效状态
feign.hystrix.enabled=true
# 加载所有的端点
management.endpoints.web.exposure.include="*"

package cn.kgc.feign;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.RequestMapping;/*FeignClient的name属性值和eureka_client_product的appliaction属性文件找那个的spring.application.name保持一致
fallback属性指定容错处理类
springcloud默认已经为feign整合了hystrix，只要hystrix在项目中，使用feign就会
默认使用熔断器处理所欲的请求
熔断器模式类似于生活中的电路保险丝，当电流抄在可能银帆危险时就会自动断开，使用熔断器模式，
如果请求出现异常，所有的请求都会直接返回而不会等待或阻塞，这样可以减少资源的浪费。
熔断器还有一种半开的状态，当熔断器发现异常后悔进入半打开状态，此时会定时接受
一个请求来检测系统是否恢复，如果请求调用成功，代表系统已经恢复正常，救护关掉熔断器，
否则继续打开*/
@FeignClient(name="client-school-provider",fallback = StudentFeignFallBack.class)
public interface StudentFeign {//下面的调用接口标准要和eureka-client-provider中的controller请求方法必须保持一致@RequestMapping("/data.do")public String stuData();}

package cn.kgc.feign;import org.springframework.stereotype.Component;//容错处理类
@Component
public class StudentFeignFallBack implements StudentFeign{@Overridepublic String stuData() {return "服务器异常，请稍后在尝试登陆";}
}

package cn.kgc.controller;import cn.kgc.feign.StudentFeign;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;@RestController
public class StudentController {@Autowiredprivate StudentFeign studentFeign;@RequestMapping("/studata.do")public String showOptionsData(){return studentFeign.stuData();}
}