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Posted on 2006-07-14
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Last Modified: 2008-01-09
Hi,
what's the difference between :

1)
getServletContext().getRequestDispatcher(urlErreur).forward(request,response);

2)
request.getRequestDispatcher(urlErreur).forward(request,response);


I'm new to JSP thank you.
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Question by:matthew016
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by:kaliyugkaarjun
kaliyugkaarjun earned 100 total points
ID: 17113296
Difference between
request.getRequestDispatcher("url").forward(request,response);

and

getServletConfig().getServletContext().getRequestDispatcher("url").forward(request,response);

One : you can pass relative URL address when using request.getRequestdispather, and absolute URL address when using ServletConfig.getRequestDispatcher.

Two: All request details are not passed when using ServletConfig.getRequestDispatcher. May be it is the query string parameters for the current page that does not reach the page where request is forwarded.

Also go thr this link for more info

http://forum.java.sun.com/thread.jspa?threadID=650087&messageID=3824146
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by:kaliyugkaarjun
ID: 17113299
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Expert Comment

by:pankilmpatel
ID: 17119671
Hi,

request.getRequestDispatcher(path): In order to create it we need to give the relative path of the resource, context.getRequestDispatcher(path): In order to create it we need to give the absolute path of the resource.

Regards,
pankil Patel
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by:matthew016
ID: 17120802
I use
getServletContext().getRequestDispatcher("index.jsp").forward(request,response);
so it's a relative path and it works well
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by:
pankilmpatel earned 400 total points
ID: 17121030
hi,

REQUEST: relative paths that are relative to the path of the current request (not relative to the root of the ServletContext),
CONTEXT: relative to the root of the ServletContext and begin with a '/'.

you can refer following link for more understanding.
http://java.boot.by/wcd-guide/ch03s05.html

For reference..
http://www.techinterviews.com/?p=148
http://www.knowd.co.jp/tech/skeletons/repositry/j2ee/servlet/caseofdispatcher.html

Regards,
Pankil
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