There is no reason to have a main method in a web application. It may have been useful for debugging during application development,
but such a method should never make it into production. Having a main method in a web application opens a door to the application logic
that an attacker may never be able to reach (but watch out if one does!), but it is a sloppy practice and indicates that other problems may be
present.
This rule raises an issue when a main method is found in a servlet or an EJB.
public class MyServlet extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
if (userIsAuthorized(req)) {
updatePrices(req);
}
}
public static void main(String[] args) { // Noncompliant
updatePrices(req);
}
}