spring中classpath

http://blog.csdn.net/wlwlwlwl015/article/details/48134763

Maven 项目的 classpath 理解

applicationContext.xml放在maven的src/main/resources下，将web.xml中的<param-value>配置如下。

<servlet>
        <servlet-name>springMvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:applicationContext.xml</param-value>
        </init-param>
        <load-on-startup>2</load-on-startup>
    </servlet>  

如下异常：Could not open ServletContext resource [/WEB-INF/applicationContext.xml

原因：如果不特意指定参数名为contextConfigLoction的<context-parameter>元素，那么spring的ContextLoderListener监听器就会在/WEB-INF/下去寻找并加载该目录下的名为applicationContext.xml这个文件。

解决：

 <context-param>
         <param-name>contextConfigLocation</param-name>
         <param-value>classpath:applicationContext.xml</param-value>
     </context-param>  

     <listener>
         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
     </listener>