## 接口的使用
org.springframework.scheduling.config.ScheduledTaskHolder

- 使用ScheduledTaskHolder的程序包
  程序包 | 说明
  --- | ---
  org.springframework.scheduling.annotation | Java 5 annotation for asynchronous method execution.
  org.springframework.scheduling.config | Support package for declarative scheduling configuration, with XML schema being the primary configuration format.

- - ### org.springframework.scheduling.annotation中ScheduledTaskHolder的使用

    实现ScheduledTaskHolder的org.springframework.scheduling.annotation中的类
    限定符和类型 | 类和说明
    --- | ---
    `class` | `ScheduledAnnotationBeanPostProcessor` Bean post-processor that registers methods annotated with @`Scheduled` to be invoked by a `TaskScheduler` according to the "fixedRate", "fixedDelay", or "cron" expression provided via the annotation.

  - ### org.springframework.scheduling.config中ScheduledTaskHolder的使用

    实现ScheduledTaskHolder的org.springframework.scheduling.config中的类
    限定符和类型 | 类和说明
    --- | ---
    `class` | `ContextLifecycleScheduledTaskRegistrar` `ScheduledTaskRegistrar` subclass which redirects the actual scheduling of tasks to the `ContextLifecycleScheduledTaskRegistrar.afterSingletonsInstantiated()` callback (as of 4.1.2).
    `class` | `ScheduledTaskRegistrar` Helper bean for registering tasks with a `TaskScheduler`, typically using cron expressions.