org.springframework.core.annotation

## 注释类型 Order

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

  `@Order` defines the sort order for an annotated component.

  The `value()` is optional and represents an order value as defined in the `Ordered` interface. Lower values have higher priority. The default value is `Ordered.LOWEST_PRECEDENCE`, indicating lowest priority (losing to any other specified order value).

  NOTE: Since Spring 4.0, annotation-based ordering is supported for many kinds of components in Spring, even for collection injection where the order values of the target components are taken into account (either from their target class or from their `@Bean` method). While such order values may influence priorities at injection points, please be aware that they do not influence singleton startup order which is an orthogonal concern determined by dependency relationships and `@DependsOn` declarations (influencing a runtime-determined dependency graph).

  Since Spring 4.1, the standard `Priority` annotation can be used as a drop-in replacement for this annotation in ordering scenarios. Note that `@Priority` may have additional semantics when a single element has to be picked (see `AnnotationAwareOrderComparator.getPriority(java.lang.Object)`).

  Alternatively, order values may also be determined on a per-instance basis through the `Ordered` interface, allowing for configuration-determined instance values instead of hard-coded values attached to a particular class.

  Consult the javadoc for `OrderComparator` for details on the sort semantics for non-ordered objects.

  从以下版本开始:
    2.0
  作者:
    Rod Johnson, Juergen Hoeller
  另请参阅:
    `Ordered`, `AnnotationAwareOrderComparator`, `OrderUtils`, `Priority`

- - ### 可选元素概要

    可选元素
    限定符和类型 | 可选元素和说明
    --- | ---
    `int` | `value` The order value.

- - ### 元素详细资料

    - #### value

          public abstract int value

      The order value.

      Default is `Ordered.LOWEST_PRECEDENCE`.

      另请参阅:
        `Ordered.getOrder()`
      默认值:
        2147483647