p.rajinikanth

 Profile Answers by p.rajinikanth 

• Jul 10th, 2007

 

The ServletContext.getRequestDispatcher method takes a String argument describing a path within the scope of the ServletContext. This path must be relative to the root of the ServletContext and begin with a '/'. The method uses the path to look up a servlet, using the servlet path matching rules, wraps it with a RequestDispatcher object, and returns the resulting object. If no servlet can be resolved based on the given path, a RequestDispatcher is provided that returns the content for that path.

The ServletContext.getNamedDispatcher method takes a String argument indicating the NAME of a servlet known to the ServletContext. If a servlet is found, it is wrapped with a RequestDispatcher object and the object is returned. If no servlet is associated with the given name, the method must return null.

To allow RequestDispatcher objects to be obtained using relative paths that are relative to the path of the current request (not relative to the root of the ServletContext), the ServletRequest.getRequestDispatcher method is provided in the ServletRequest interface. The behavior of this method is similar to the method of the same name in the ServletContext. The servlet container uses information in the request object to transform the given relative path against the current servlet to a complete path.