This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
I am pretty sure that case must match between your form and the parameters on the url. So if your form has a property roleId with a method setRoleId then the url should use "roleId". Struts will take care of populating the values in your form.