Gang Zhang,您好! the fact is that the servlet is working right! I want to add some new function, but I want not to modify the servlet, and to use filter to control the servlet. When a method in servlet method succeful,the filter do something ,or the filter do nothing.
Thank you very much for you had answered my many questions! ======= 2004-01-08 22:08:00 您在来信中写道:======= >Do you want to write debug messages? you can either >print to standard out or print to browser screen with >the response (for testing). Or you can log to file for >checking > >Gang > >groundsea wrote: > >>Bob Withers,您好! >> >> I mean how the filter control the method when the method is succeful, which >> do not throw Exception. >> >>======= 2004-01-08 05:55:00 您在来信中写道:======= >> >> >> >>>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? >>>> >>>> 致 >>>>礼! >>>> >>>> >>>> groundsea >>>>[EMAIL PROTECTED] >>>> 2004-01-08 >>>> >>>>___________________________________________________________________________ >>>>To unsubscribe, send email to [EMAIL PROTECTED] and include in the body >>>>of the message "signoff SERVLET-INTEREST". >>>> >>>>Archives: http://archives.java.sun.com/archives/servlet-interest.html >>>>Resources: http://java.sun.com/products/servlet/external-resources.html >>>>LISTSERV Help: http://www.lsoft.com/manuals/user/user.html >>>> >>>> >>>___________________________________________________________________________ >>>To unsubscribe, send email to [EMAIL PROTECTED] and include in the body >>>of the message "signoff SERVLET-INTEREST". >>> >>>Archives: http://archives.java.sun.com/archives/servlet-interest.html >>>Resources: http://java.sun.com/products/servlet/external-resources.html >>>LISTSERV Help: http://www.lsoft.com/manuals/user/user.html >>> >>> >> >>= = = = = = = = = = = = = = = = = = = = >> >> >> 致 >>礼! >> >> >> groundsea >>[EMAIL PROTECTED] >> 2004-01-09 >> >>___________________________________________________________________________ >>To unsubscribe, send email to [EMAIL PROTECTED] and include in the body >>of the message "signoff SERVLET-INTEREST". >> >>Archives: http://archives.java.sun.com/archives/servlet-interest.html >>Resources: http://java.sun.com/products/servlet/external-resources.html >>LISTSERV Help: http://www.lsoft.com/manuals/user/user.html >> >> >> > >___________________________________________________________________________ >To unsubscribe, send email to [EMAIL PROTECTED] and include in the body >of the message "signoff SERVLET-INTEREST". > >Archives: http://archives.java.sun.com/archives/servlet-interest.html >Resources: http://java.sun.com/products/servlet/external-resources.html >LISTSERV Help: http://www.lsoft.com/manuals/user/user.html = = = = = = = = = = = = = = = = = = = = 致 礼! groundsea [EMAIL PROTECTED] 2004-01-09 ___________________________________________________________________________ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html