Head First Servlets and JSP, 2nd Edition

Classic tags have a different lifecycle

Simple tags are simple—it’s all about doTag(). But with classic tags, there’s a doStartTag() and a doEndTag(). And that brings up an interesting problem—when and how is the body evaluated? There’s no doBody() method, but there is a doAfterBody() method that’s called after the body is evaluated and before the doEndTag() runs.