How to lauch java program on server from web page

I have a simple java program that take some parameters to create an image. I want to set up a website in which the user can choose the parameters and, from his ok pressed, the server runs the program. When the program has finished, an image is on the server so the web user can see the result. How can I do that? Which technology I need? Something like JSP or only java installed on the server? Normally, hosting services have this possibility by default or I have to choose some advanced options? Just to have an idea... Thanks!