Friday, August 20, 2004

Calling 'return' in a JSP, avoiding sendRedirect(...) problems

A not too uncommon runtime error occurs by trying to call response.sendRedirect(...) twice on a single JSP or calling response.sendRedirect(...) while writing any output to a servlet or JSP output stream.

A trick that I use to avoid this problem is to simply 'return' immediately after calling response.sendRedirect(...). This is required because the page is not redirected instantly - it occurs after all the output to the page is written.

Simple trick, but I never see this in other people's JSP code, so I thought that it was worth mentioning it.

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