When the final filter in a chain calls doFilter() the service method of the
servlet is called. If the servlet throws an exception it can be caught and
acted upon by a filter if you wish.

try
{
  doFilter(req, resp, chain);
}
catch (Exception e)
{
   // the servlet failed
}

Regards,
Bob

At 02:18 PM 1/8/2004 +0800, you wrote:
>SERVLET-INTEREST£¡
>
>       when a method of a servlet is successful, its filter begin to
> do something, or the filter not do anything.
>   I want to know, in filter how to know whether that method is successful?
>
>¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ÖÂ
>Àñ£¡
>
>
>¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡groundsea
>¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡sunyh@(protected)
>¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡2004-01-08
>
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