From the documentation: Struts2\'s Advanced Wildcard Mappings:
Advanced Wildcards
From 2.1.9+ regular expressions can be
@Andrea solution is the good one, but I had some problems:
So, I use this really close stack instead:
input,back,cancel,browse
input,back,cancel,browse
By the way, this is based on the default paramsPrepareParamsStack and on Andrea answer.