Have you used HFSJ? Or any other web developer certification book? If not then buy one. I would strongly suggest HFSJ. It has covered more than 95% of the topics. In my case, I've not at all refered the specs which is not good at the same time. If I had time for that, I would obviously go for that. You're in the same position I guess. So, I would suggest to read such topics from any of the certification or JSP/Servlet book.
Work Hard, Expect The Worst...<br /> <br />Bimal R. Patel<br />(SCJP 1.2, SCWCD 1.4)