This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
You cannot define two different configuration files for a single module. If you want to define more than one configuration file, you must also define more than one module. My suggestion would be to define a separate module named "estatistica". The entries in your web.xml file would look like this:
Then, if you wanted to call an action defined in struts-estatistica.xml, you would have to prepend "/estatistica" to the action call, for example: