@Service
public class PaymentHystrixService {
 @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback",commandProperties = {
      @HystrixProperty(name = "circuitBreaker.enabled", value = "true"),       //是否開(kāi)啟斷路器
      @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"),  //請(qǐng)求數(shù)達(dá)到后才計(jì)算
      @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "10000"), //休眠時(shí)間窗
      @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "60"), //錯(cuò)誤率達(dá)到多少跳閘
  })
  public String paymentCirtuitBreaker(@PathVariable("id")Integer id){
   if(id<0){
     throw new RuntimeException("****id不能為負(fù)數(shù)");
   }
   String randomNum= IdUtil.simpleUUID();

   return Thread.currentThread().getName()+"\t"+"調(diào)用成功，編號(hào)"+randomNum;

  }
  public String paymentCircuitBreaker_fallback(@PathVariable("id")Integer id){
    return "id不能為負(fù)數(shù)，請(qǐng)稍后重試，o(╥﹏╥)o+"+id;
  }

<dependencies>
    <dependency>
      <groupId>com.bai</groupId>
      <artifactId>cloud-api-common</artifactId>
      <version>${project.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>
    </dependency>
    <!--監(jiān)控-->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
    </dependency>
    <!--eureka client-->
    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
    </dependency>
    <!--熱部署-->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-devtools</artifactId>
      <scope>runtime</scope>
      <optional>true</optional>
    </dependency>
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <optional>true</optional>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
    </dependency>
  </dependencies>

@SpringBootApplication
@EnableHystrixDashboard
public class HystrixDashboard9001 {
  public static void main(String[] args) {
    SpringApplication.run(HystrixDashboard9001.class,args);
  }
}

/**
     * 此配置是為了服務(wù)監(jiān)控而配置，與服務(wù)容錯(cuò)本身無(wú)關(guān)，springcloud升級(jí)后的坑
     * ServletRegistrationBean因?yàn)镾pringBoot的默認(rèn)路徑不是 “/hystrix.stream"
     * 只要在自己的項(xiàng)目里配置上下的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;
    }