Explain the life cycle methods of a Servlet

Asked By irenelampitao 0 points N/A Posted on - 09/30/2011

What is the difference between the getRequestDispatcher(String path) method of javax.servlet.ServletRequest interface and javax.servlet.ServletContext interface?

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Answered By mustehsan_ikram 0 points N/A #83969

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!

 

 

 

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• Posted on - 10/04/2011
• Question Category: Development Software