spring 笔记2:Spring MVC : Did not find handler method for 问题的解决

日志显示为：

Looking up handler method for path /***
Did not find handler method for [/***]
No mapping found for HTTP request with URI [/springMVC/***] in DispatcherServlet with name 'spring'
Successfully completed request

网上很多人的解决方法都无效，最后才找到一个解决方法：

applicationContext.xml 里面不能<context:component-scan /> controller的包,

就是写了的话,那也得把controller的包用context:exclude-filter 去掉

<!-- 扫描注解对象 -->
<context:component-scan base-package="org.fgq.study">
    <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>

https://www.oschina.net/question/1015582_125252?sort=default&p=2

更深层的原因未知。spring文档中没有找到线索。