I've never used CICS or even heard of VA JAVA, but if you have 'command' classes that are your interface to CICS, why not just write a wrapper class around those? It would have the same exact API, but in each method you would toUpperCase() the
String data before calling the 'real' command class. If you have a lot of command classes, it might not save any more time than fixing the JSPs.
If you always post from JSPs to Servlets, it shouldn't be hard to write a generic function you call at the start of doPost() that loops through the parameters and uppercases them and stores them into a params Hashtable. Then change all your calls to getParameter() to (String)params.get() on the hashtable. Ex:
No guarantees the code will run, but this is the general idea. Hope this is of some help. Your only other hope is that VA JAVA has a function you haven't read about that will take care of the upper-casing.