导致 spring mvc 出现 404 的一种情况 | Jalen's Blog = Follow your heart = A happy life

原因：web 配置文件引入了两个配置文件，一个是 spring 的，一个是 spring mvc 的，spring 配置文件下配置了包扫描，而 spring mvc 配置文件没有配置，在 spring mvc 上填上就好了

	<!-- Spring 配置 -->
	<context-param>
	<param-name>contextConfigLocation</param-name>
	<param-value>
	classpath*:spring/spring-context.xml
	</param-value>
	</context-param>

	<!-- spring mvc 配置 -->
	<servlet>
	<description>spring mvc servlet</description>
	<servlet-name>springMvc</servlet-name>
	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
	<init-param>
	<description>spring mvc 配置文件</description>
	<param-name>contextConfigLocation</param-name>
	<param-value>
	classpath*:spring/spring-mvc.xml
	</param-value>
	</init-param>
	<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
	<servlet-name>springMvc</servlet-name>
	<url-pattern>/</url-pattern>
	</servlet-mapping>

spring-context.xml 中配置的包扫描

	<!-- 配置要扫描的包 -->
	<context:component-scan base-package="com.example">
	<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
	</context:component-scan>

spring-mvc.xml 中配置的包扫描

	<!-- 自动扫描 controller 包下的所有类，使其认为 spring mvc 的控制器 -->
	<context:component-scan base-package="com.example">
	<context:include-filter type="annotation"
	expression="org.springframework.stereotype.Controller" />
	<context:include-filter type="annotation"
	expression="org.springframework.web.bind.annotation.ControllerAdvice" />
	<context:exclude-filter type="annotation"
	expression="org.springframework.stereotype.Service" />
	</context:component-scan>