Spring MVC case insensitive URLs

Question

I have looked for the answer to this on Google and stackoverflow, but unfortunately the solutions provided either assume a lot of prior knowelege about Spring MVC and Java or are about case insensitivity with annotations.

Because of this I am not sure how to adapt these solutions to my own problem, hence the reason for this new question about it.

What I want to do sounds simple. I have a dispatcher-servlet.xml file with the following block of XML in it:

<bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
        <property name="mappings">
            <props>
                <prop key="*.htm">pageController</prop>
                <prop key="*.html">pageController</prop>
                <prop key="/cms/*">pageController</prop>
                <prop key="/admin/*">adminController</prop>
            </props>
        </property>
    </bean>

I want the /cms/* and /admin/* keys to be case insensitive, but being new to both Java and Spring MVC, I don't understand how I should go about doing this.

For example, even if someone types /CMS/ or /Cms/ I want it to use the pageController whereas at the moment it will just display a 404 page.

Would anyone be able to explain to me exactly what I would have to do to achieve my desired result?

Any help would be greatly appreciated!

Edit:

As per Rupok's answer I have added a class to extend AntPathMatcher.

Unfortunately being new to this I do not know how to "set this back on the SimpleUrlHandlerMapping".

Would anybody be able to point me in the right direction?

Answer 1

Rupok's answer got me started in the right direction but I needed to change the implementation a little to get it to work.

public class CaseInsensitiveAntPathMatcher extends AntPathMatcher {
    @Override
    protected boolean doMatch(String pattern, String path, boolean fullMatch, Map<String, String> uriTemplateVariables) {
        return super.doMatch(pattern.toLowerCase(), path.toLowerCase(), fullMatch, uriTemplateVariables);
    }
}

match(String,String) and sever other method delegate to doMatch(String,String,boolean,Map).

Also, since I am using a org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping I needed to plug in my new matcher like this

<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
    <property name="order" value="0" />
    <property name="pathMatcher">
        <bean class="youpackage.CaseInsensitiveAntPathMatcher" />
    </property>
</bean>