3.2 spring-boot-dependencies 与 spring-boot-parent 作为 parent
    image.pngimage.pngimage.png

    5 自动装配
    image.png

    image.png

    6 Production-ready

    Provide production-ready features such as metrics, health checks and externalized configuration.

    management . endpoints . web . exposure. include=*

    6.4

    7.3
    元注解 Meta-Annotations 能标注在其它注解上面的注解