Explain the life cycle methods of a Servlet

 

Request Dispatcher can be retrieved by 2 methods

 

1. From a ServletRequest

 

RequestDispatcher view = request.getRequestDispatcher(?mPage.jsp?); 

 

The getRequestDispatcher() method in ServletRequest takes a String path for the resource to which you are forwarding the request. If the path starts with a forward slash (?/?), the Container sees that as "starting from the root of this web app". If the path does NOT start with a forward slash, it's considered relative to the original request. 

 

2. From ServletContext

 

RequestDispatcher view = getServletContext().getRequestDispatcher(?/mPage.jsp?); 

 

Like the equivalent method in ServletRequest, this getRequestDispatcher() method takes a String path for the resource to which you're forwarding the request, EXCEPT you cannot specify a path relative to the current resource (the one that received this request). That means you must start the path with a forward slash!