<mark>服務熔斷處理是在服務端實現的，與消費端沒有關系</mark>。為了方便演示熔斷效果，在這里搭建一個服務端模塊。 <br/> 步驟如下： **1. 構建服務端模塊：cloud-provider-hystrix-payment8001** **2. 在當前模塊的`pom.xml`中添加 hystrix 依賴** ```xml <dependencies> <!--hystrix --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-hystrix</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> ... </dependencies> ``` **3. 當前模塊的`resources/application.yml`** ```yml server: port: 8001 eureka: client: service-url: defaultZone: http://www.eureka7001.com:7001/eureka/,http://www.eureka7002.com:7002/eureka/ spring: application: name: cloud-payment-service ``` **4. 在當前模塊的啟動類上標注注解`@EnableCircuitBreaker`** ```java @SpringBootApplication @EnableDiscoveryClient @EnableCircuitBreaker public class PaymentHystrixMain8001 { public static void main(String[] args) { SpringApplication.run(PaymentHystrixMain8001.class, args); } /** * 此配置是為了服務監控而配置，與服務容錯本身無關，springcloud升級后的坑 * ServletRegistrationBean因為springboot的默認路徑不是/hystrix.stream * 只要在自己的項目里配置下面的Servlet就可以了 */ @Bean public ServletRegistrationBean getServlet() { HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet(); ServletRegistrationBean registrationBean = new ServletRegistrationBean(streamServlet); registrationBean.setLoadOnStartup(1); registrationBean.addUrlMappings("/hystrix.stream"); registrationBean.setName("HystrixMetricsStreamServlet"); return registrationBean; } } ``` **5. 構建完成！**