解决无法引入spring-cloud-starter-netflix-hystrix-dashboard

加入依赖：

<dependency> 这两个依赖配合才引入了dashboard
            <groupId>com.netflix.hystrix</groupId>
            <artifactId>hystrix-javanica</artifactId>
            <version>RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-netflix-hystrix-dashboard</artifactId>
        </dependency>

再重新导入即可；完成后可删除上面的两个依赖，只需要下面这个就行

 <!--hytrix dashbord组件依赖 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>
        </dependency>