CSE4413

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====== Advanced JSP ======

This week exposes custom tags in JSP pages.

===== Outline =====

  * In addition to ''core'', JSTL has many libraries whose coverage includes XML/XSL, Internationalization, Database access, Email, Regex, and Logging.
  * If JSTL does not have what is needed, create your own custom tag.
  * Three kinds of custom tags: utility-based tags, handler-based tags, and JSP-based tags.
  * The linkage between a tags and its target is done via the namespace, taglib.tld, and the tags directory.
  * Utility based tags are very simple to implement but are useful mainly for computation. This is because the static method has no access to the context's data structures.
  * Handler based tags are extremely powerful. They can access everything the servlet can access. The tag can have attributes as well as a body, and the Java method can access their contents.
  * JSP based tags are written in JSP and do not involve any Java. They are thus ideal when there is little logic but lots of presentation work.
  

===== To Do =====

  * Look at the ''labtest'' directory in the //Resource Directory//.
  * Look at ''CUSTdemo'' in the //Resource Directory// under ''jsp''.
  * Read Chapter 6 up to and excluding Section 6.7.
  * Read Chapter 8, Section 8.6 and 8.7.