springMvc+shiro做权限管理,过滤静态文件

在shiroFilter 和 mvc:resources中都需要配置，

如：

shiroFilter中：

<property name="filterChainDefinitions">  
    <value>  
        /css/** = anon  
        /js/** = anon  
        /img/** = anon  
    </value>  
</property> 

 在spring-mvc.xml中：

<mvc:resources mapping="/css/**" location="/css/" cache-period="2592000"/>   
<mvc:resources mapping="/img/**" location="/img/" cache-period="2592000"/>   
<mvc:resources mapping="/js/**" location="/js/" cache-period="2592000"/>