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In a JSP-based web application, let’s say I’m hosting my static content on a CDN, but during development I want serve that content from my web application — just to make life easy.
How do I make the URL for my static content dynamic in a way that any JSP can automatically see it?
Do I define some singleton class to contain all my settings and just grab an instance of that from my JSP? Is there some way to make some parameters available to all JSPs? Or is there some other way altogether?
You need this set as request or servlet context attribute. It can be done in a
Filter(per request) or (better, as BalusC suggested) –ServletContextListener. You put a request attribute calledstaticRootand then all URLs to static resources:<img src="${staticRoot}/images/logo.ong" />The setting can be read at startup by the filter from a properties file (usually placed outside the .war file), so that you can supply different properties for different environments.