原始的类必须都有注解 @RefreshScope
引用该类的地方有 @RefreshScope 才会刷新 @Value 注入的值
EnvironmentManager
https://spring.io/guides/gs/centralized-configuration/ https://www.devglan.com/spring-cloud/refresh-property-config-runtime https://www.oodlestechnologies.com/blogs/Reload-External-Configuration-on-Runtime-in-Spring-Boot
https://stackoverflow.com/questions/49311068/refreshscope-and-refresh-not-working
spring-cloud/spring-cloud-config#290
https://www.jianshu.com/p/7acefd689b6f
http://www.scienjus.com/spring-cloud-refresh/
https://www.safaribooksonline.com/library/view/building-microservices-with/9780134192468/02_08.html