annotation-config, annotation-driven, compont-scan 区别

<context:annotation-config> declares support for general annotations such as @Required, @Autowired, @PostConstruct, and so on.

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<mvc:annotation-driven /> declares explicit support for annotation-driven MVC controllers (i.e. @RequestMapping, @Controller, although support for those is the default behaviour), as well as adding support for declarative validation via @Valid and message body marshalling with @RequestBody/ResponseBody.

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<context:annotation-config>: Scanning and activating annotations for already registered beans in spring config xml.

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<context:component-scan>: Bean registration + <context:annotation-config>

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参考资料：

1、annotation-config, annotation-driven, compont-scan 区别
http://blog.youkuaiyun.com/catoop/article/details/50068573

2、Difference between <context:annotation-config> vs <context:component-scan>
https://stackoverflow.com/questions/7414794/difference-between-contextannotation-config-vs-contextcomponent-scan

3、What’s the difference between<mvc:annotation-driven /> and <context:annotation-config />in servlet?
https://stackoverflow.com/questions/3977973/whats-the-difference-between-mvcannotation-driven-and-contextannotation

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