<dependency>

            <groupId>org.springframework.cloud</groupId>

            <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>

        </dependency>

<dependency>   
 <groupId>org.springframework.cloud</groupId>  
  <artifactId>spring-cloud-starter-hystrix</artifactId>
</dependency>
<dependency>   
 <groupId>org.springframework.cloud</groupId> 
   <artifactId>spring-cloud-starter-hystrix-dashboard</artifactId>
</dependency><dependency>  
  <groupId>org.springframework.boot</groupId>  
  <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>

package com.cxy;

import com.netflix.hystrix.contrib.metrics.eventstream.HystrixMetricsStreamServlet;

import com.netflix.loadbalancer.BestAvailableRule;

import com.netflix.loadbalancer.IRule;

import org.mybatis.spring.annotation.MapperScan;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.boot.web.servlet.ServletRegistrationBean;

import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker;

import org.springframework.cloud.client.loadbalancer.LoadBalanced;

import org.springframework.cloud.netflix.eureka.EnableEurekaClient;

import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;

import org.springframework.cloud.openfeign.EnableFeignClients;

import org.springframework.context.annotation.Bean;

import org.springframework.web.client.RestTemplate;

/***

 * @ClassName: PersonApplication

 * @Description:

 * @Auther: 陈绪友

 * @Date: 2019/1/2816:30

 * @version : V1.0

 */

@EnableCircuitBreaker

@SpringBootApplication

@EnableEurekaClient  //开启注解，注册服务

@MapperScan("com.cxy")

@EnableFeignClients

@EnableHystrixDashboard

public class UserApplication {

    public static void main(String[] args) {

        SpringApplication.run(UserApplication.class,args);

    }

   @Bean

   // @LoadBalanced  //使用负载均衡器Ribbon

    public RestTemplate getRestTemplate(){

        return new RestTemplate();

    }

    /*@Bean

    public IRule myRule(){

        //return new RoundRobinRule();//轮询

        // return new RetryRule();//重试

        return new BestAvailableRule();

    }*/

    @Bean

    public ServletRegistrationBean getServlet(){

        HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet();

        ServletRegistrationBean registrationBean = new ServletRegistrationBean(streamServlet);

        registrationBean.setLoadOnStartup();

        registrationBean.addUrlMappings("/actuator/hystrix.stream");

        registrationBean.setName("HystrixMetricsStreamServlet");

        return registrationBean;

    }

}

java.net.UnknownHostException: loclahost

    at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method) ~[na:1.8.0_192]

    at java.net.InetAddress$.lookupAllHostAddr(InetAddress.java:) ~[na:1.8.0_192]

    at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:) ~[na:1.8.0_192]

    at java.net.InetAddress.getAllByName0(InetAddress.java:) ~[na:1.8.0_192]

    at java.net.InetAddress.getAllByName(InetAddress.java:) ~[na:1.8.0_192]

    at java.net.InetAddress.getAllByName(InetAddress.java:) ~[na:1.8.0_192]

    at org.apache.http.impl.conn.SystemDefaultDnsResolver.resolve(SystemDefaultDnsResolver.java:) ~[httpclient-4.5..jar:4.5.]

    at org.apache.http.impl.conn.DefaultClientConnectionOperator.resolveHostname(DefaultClientConnectionOperator.java:) ~[httpclient-4.5..jar:4.5.]

    at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:) ~[httpclient-4.5..jar:4.5.]

    at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:) ~[httpclient-4.5..jar:4.5.]

    at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:) ~[httpclient-4.5..jar:4.5.]

    at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:) ~[httpclient-4.5..jar:4.5.]

    at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:) ~[httpclient-4.5..jar:4.5.]

    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:) ~[httpclient-4.5..jar:4.5.]

    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:) ~[httpclient-4.5..jar:4.5.]

    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:) ~[httpclient-4.5..jar:4.5.]

    at org.springframework.cloud.netflix.hystrix.dashboard.HystrixDashboardConfiguration$ProxyStreamServlet.doGet(HystrixDashboardConfiguration.java:) ~[spring-cloud-netflix-hystrix-dashboard-2.1..RELEASE.jar:2.1..RELEASE]

    at javax.servlet.http.HttpServlet.service(HttpServlet.java:) [tomcat-embed-core-9.0..jar:9.0.]