Parameters for filter, cleaner way?

Question

I'm writing a filter and want to exclude some directories from that filter. Right now i've got this:

 <filter>
        <filter-name>myFilter</filter-name>
        <filter-class>filter.aFilter</filter-class>
        <init-param>
            <param-name>excludePatterns</param-name>
            <param-value>/css,/images</param-value>
        </init-param>
    </filter>

I was wondering if there is a cleaner way than the comma seperated values, which I have to split in my filter. Is there a pure xml way of specifying multiple parameters in the web.xml file for your filter?

Thanks in advance