Spring 中配置申明式的配置信息

<!-- Spring root -->
<context-param>
<param-name>contextClass</param-name>
<param-value>
org.springframework.web.context.support.AnnotationConfigWebApplicationContext
</param-value>
</context-param>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>org.baeldung.spring</param-value>  <!-- 指定要有@Configuration申明的类路径 -->
</context-param>

<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>  <!-- 还是跟以前一样 -->