Showing posts from November, 2013

Tip: Parent controller to handle exception in Spring MVC

Spring MVC is a powerful framework and I got a tip that can be useful. Spring MVC uses the technique of something called Controller which can be bound to handle the different user request to do a prerequisites before showing the user a specific page he requested. In case you got many controllers and you need to handle the common exceptions for your application. You can do that by making a parent class which I prefer to call Parent Controller that can handle the exception as the bellow examples shows. Then you can extend that class in your other different controllers. import org.springframework.web.bind.annotation.ExceptionHandler; import org.springframework.web.servlet.ModelAndView; public class ParentController { private ModelAndView modelAndView; @ExceptionHandler(NullPointerException.class) public ModelAndView handleNullPointerException(NullPointerException e) { // Display the error page modelAndView = new ModelAndView("404"); modelAndView.addObject("m