Springs own bean postprocessors

I was reading folowing lines and I did not understand clearly.
Springs own bean postprocessors
The Spring framework itself uses several implementations of BeanPostProcessor
under the covers. For example, ApplicationContextAwareProcessor is a Bean-
PostProcessor that sets the application context on beans that implement the
ApplicationContextAware interface. You do not need to register
ApplicationContextAwareProcessor yourself. It is preregistered by the application
context itself.

Learn how to automatically apply aspects to application beans
using DefaultAdvisorAutoProxyCreator, which is a BeanPostProcessor that creates
AOP proxies based on all candidate advisors in the container.
Any ideas, resources,sample code,links, highly appreciated. thanks in advance.
Who is Participating?
objectsConnect With a Mentor Commented:
post processers are beans that perform some processing o your bean after it has been created.
spring provides use few post processors when it is wiring up your application
you can also add your own, or use some of the processors it provides
for example the DefaultAdvisorAutoProxyCreator will create proxies for your beans

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