JSP Tag Libraries in Breif

You have many options when it comes to generating dynamic content inside the JSP page.

These options are as follows :

• Scripting elements calling servlet code directly
• Scripting elements calling servlet code indirectly (by means of utility     classes)
• Beans
• Servlet/JSP combo (MVC)
• MVC with JSP expression language
• Custom tags

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Using Debug Tag with an Example

In this article we explained that to send the JSP content of the tag body to the client, one need only call the getJspBody().invoke(null) method inside the doTag method of the tag handler class.

This simplicity allows us to easily create tags that output their bodies conditionally. This functionality can be achieved by simply surrounding the getJspBody().invoke(null) invocation within an if statement.

In this section, we present an example of a custom tag that conditionally outputs its tag body. It's quite often the case when the output of the JSP page is something other than what you expected. In such a case, it's useful to have the option of seeing some debugging information right on the page without having to resort to embedding System.out.print statements throughout the page.

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