How to use RequestDispatcher to include or forward to a web resource ?

ServletContext.getRequestDispatcher(String path)

• A RequestDispatcher object can be used to forward a request to the resource or to include the resource in a response.
• The resource can be dynamic or static.
• The path must begin with a "/" and is interpreted as relative to the current context root.

ServletRequest.getRequestDispatcher(String path)

• The pathname specified may be relative, although it cannot extend outside the current servlet context.
• If the path begins with a "/" it is interpreted as relative to the current context root.