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spring boot 2.1.X 版本中融合 Greenwich.M2 的 spring cloud

一. feign + hystrix dashboard 整合

gradle 中需要导入的依赖,( SpringCloudVersion = ‘2.1.0.M2’)

dependencies {
    compile(
        "org.springframework.boot:spring-boot-starter-actuator",
        "org.springframework.cloud:spring-cloud-starter-openfeign:${SpringCloudVersion}",
        "org.springframework.cloud:spring-cloud-starter-netflix-hystrix:${SpringCloudVersion}",
        "org.springframework.cloud:spring-cloud-starter-netflix-hystrix-dashboard:${SpringCloudVersion}",
        "org.springframework.cloud:spring-cloud-starter-netflix-eureka-client:${SpringCloudVersion}"
    )

}

``

在主程序启动类中加入@EnableHystrixDashboard注解，开启hystrixDashboard。

package pers.roamer.spring.cloud.feign.client;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.hystrix.EnableHystrix;
import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;
import org.springframework.cloud.openfeign.EnableFeignClients;

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

在浏览器中输入 http://127.0.0.1:8765/actuator/hystrix
在此界面的 url 中录入： http://127.0.0.1:8765/actuator/hystrix.stream

注意: 在这里要加入actuator
如果这里出现， Unable to connect to Command Metrix Stream.

需要在applicaiton.yaml 中加入下面一段:（注意最后的*一定要加上引号，不然会启动报错。）
```
#解决 在 spring boot 2.0 下 hystrix.stream 404的错误
management:
    endpoints:
        web:
            exposure:
                include: '*'
```
如果一直出现 loading 的界面。