JSP is designed for the presentation layer in the web applications but it needs to contain the logic or code inside the page to control the way it presents the visual elements. Since JSP was borned, scriptlet has been used intensively therefore the JSP pages become messy and difficult to maintain. The HTML mixed with JSP scriptlet and opening and closing brace make JSP page even hard to extend.
In June 2002, JavaServer Pages standard library (JSTL) specification 1.0 was first released. JSTL provided a new ways for JSP author to work with different elements with standard friendly tags. The current version of the JSTL is 1.2 which was started in 2004 so we will use JSTL 1.2 for all the tutorials.
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