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public interface Component组件用于实现某个特定的功能,可以自由进行扩展。 一般情况下,组件需要注册,并且需要提供一个无参构造方法,以便正确启用。
Component can be used to implement some specific function, and is extensible. Normally, it should be registered and provide a no-arg constructor to be enabled correctly.