Update

14/02/2021, the book's website http://pdf.coreservlets.com/ is no longer online. We switched the download link to the Oracle's Java Servlet tutorial page.

From the Back Cover

The J2EE(TM) Platform has become the technology of choice for developing professional e-commerce applications, interactive Web sites, and Web-enabled applications and services. Servlet and JSP(TM) technology is the foundation of this platform: it provides the link between Web clients and server-side applications. In this 2nd edition of the worldwide bestseller, the authors show you how to apply the latest servlet and JSP capabilities. Unlike other books that treat servlet or JSP technology in isolation, Core Servlets and JavaServer Pages provides a unified treatment, showing you when servlet technology is best, when the JSP approach is preferred, and when (and how) servlets and JSP should work together.