The ServletContext class is important in web application, often times, you need this class get the information of current deployed servlet container. Here’s a trick to show you how to get ServletContext in JSF2, via FacesContext. ServletContext servletContext = (ServletContext) FacesContext .getCurrentInstance().getExternalContext().getContext(); References ServletContext JavaDoc FacesContext JavaDoc
Many servlet’s developers are confuse about the different between “ServletConfig” and “ServletContext”. Actually the “ServletContext” name is quite confusing, it should change to “AppConfig” or “AppContext” in the future release 🙂 ContextConfig 1) This is one per “web application”, access globally by all the servlets’ class 2) web.xml – within the web-app element and outside …
Here’s a serlvet code example to demonstrate how to pass a parameter to whole web application by using ServletContext “init-param” in web.xml. In the deployment descriptor (web.xml) Put your parameter value in “init-param” and make sure outside the “servlet” element <servlet> <servlet-name>ServletName</servlet-name> <servlet-class>com.mkyong.ServletDemo</servlet-class> </servlet> <context-param> <param-name>email</param-name> <param-value>[email protected]</param-value> </context-param> Servlet code public void doGet(HttpServletRequest request, HttpServletResponse …