There are multiple 'methods' in HTTP which you can use to call web respources. GET and POST and the most common.
'Typically' (and this is a bit of a generalisation) resources get called using 'GET', although the actual method in some cases is not important. In the case where you don't care, some people allow the same piece of code to execute for both the 'GET' and 'POST' calls.
It is eqivalent to:
Personally I don't do this. Servlets respond to GET, POST, or both, but when it responds to both it behaves differently for each. Others will disagree.