Spring AOP 的切点切在Controller上没有起作用的问题。

做下笔记，以防忘记。

在Spring MVC 中使用面向切面编程，感觉所有的配置、切面、切点的编写都没有写错，但是当切点切在@Controller注解的类的方法上时就不起作用。当切点切在的其他的非@Controller注解的方法上时就起作用。

解决办法：在SpringMVC的配置文件中的加入一下代码即可解决：

<aop:aspectj-autoproxy proxy-target-class="true"></aop:aspectj-autoproxy>

至于原因：看网上的说法，目前不明觉厉。

The aspects and the beans to be applied needs to be in the same ApplicationContext but ApplicationContext is not aware of WebApplicationContext .

Indeed your controller (annotated by @Controller) and your aspects (annotated by @Aspect) should be in the same Spring context.

Usually people define their controllers in the dispatch-servlet.xml or xxx-servlet.xml and their service beans (including the aspects) in the main applicationContext.xml. It will not work.

When Spring initializes the MVC context, it will create a proxy for your controller but if your aspects are not in the same context, Spring will not create interceptors for them. 

参考：http://yjian84.iteye.com/blog/1920787