org.springframework.context.annotation

## 注释类型 DependsOn

-     @Target(value={TYPE,METHOD})
       @Retention(value=RUNTIME)
       @Documented
      public @interface DependsOn

  Beans on which the current bean depends. Any beans specified are guaranteed to be created by the container before this bean. Used infrequently in cases where a bean does not explicitly depend on another through properties or constructor arguments, but rather depends on the side effects of another bean's initialization.

  A depends-on declaration can specify both an initialization-time dependency and, in the case of singleton beans only, a corresponding destruction-time dependency. Dependent beans that define a depends-on relationship with a given bean are destroyed first, prior to the given bean itself being destroyed. Thus, a depends-on declaration can also control shutdown order.

  May be used on any class directly or indirectly annotated with `Component` or on methods annotated with `Bean`.

  Using `DependsOn` at the class level has no effect unless component-scanning is being used. If a `DependsOn`-annotated class is declared via XML, `DependsOn` annotation metadata is ignored, and `<bean depends-on="..."/>` is respected instead.

  从以下版本开始:
    3.0
  作者:
    Juergen Hoeller

- - ### 可选元素概要

    可选元素
    限定符和类型 | 可选元素和说明
    --- | ---
    `String[]` | `value`

- - ### 元素详细资料

    - #### value

          public abstract String[] value

      默认值:
        {}