spring - Is <context: annotation-config> necessary for annotation @Resource , @PostConstruct and @PreDestroy? -

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i new in spring , want know if write @resource or @postconstruct or @predestroy annotation on method of class necessary add "context: annotation-config" tag in xml file register method.

my confusion @resource or @postconstruct or @predestroy jsr-250 annotation not specific spring-framework why "context: annotation-config" tag added in config file(spring.xml).

i know applicable @required , @autowired annotation.

can explain please ?

the thing that, no matter annotation is, doesn't anything, kind of mark tell other thing means. , when add context: annotation-config in xml file, when start tomcat or other load environment of spring, when found context: annotation-config, register beans spring has implemented scan class find annotation @resource or @postconstruct or @predestroy, , thing do, such instantiate bean, bind value , on.


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