apache shiro用户登录成功后jsp页面的css样式为什么显示异常？

在配置shiro之前这些都是显示的出来的

然后shiro配置里关于样式的权限配置：

<!-- Shiro的Web过滤器 -->
    <bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">
        <property name="securityManager" ref="securityManager"/>
        <property name="loginUrl" value="/login"/>
        <property name="filters">
            <util:map>
                <entry key="authc" value-ref="formAuthenticationFilter"/>
                <entry key="sysUser" value-ref="sysUserFilter"/>
            </util:map>
        </property>
        <property name="filterChainDefinitions">
            <value>
                /assets/** = anon
                /common/** = anon
                /css/** = anon
                /images/** = anon
                /js/** = anon
                /login = authc
                /logout = logout
                /authenticated = authc
                /** = authc
            </value>
        </property>
    </bean>

样式目录结构是：