springboot 2.0需要添加 ServletRegistrationBean 因为springboot的默认路径不是 "/hystrix.stream"，只要在自己的项目里配置上下面的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; }