Custom tags in jsp example

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In this chapter, we will discuss the Custom Tags in JSP. A custom tag is a user-defined JSP language element.

Jsp tag library

Custom tags in java

Jsp tags

Tld file in jsp

Custom tag in html

When a JSP page containing a custom tag is translated into a servlet, the tag is converted to operations on an object called a tag handler. The Web container then invokes those operations when the JSP page's servlet is executed.

JSP tag extensions lets you create new tags that you can insert directly into a JavaServer Page.

The JSP 2.0 specification introduced the Simple Tag Handlers for writing these custom tags.

To write a custom tag, you can simply extend SimpleTagSupport class and override the doTag() method, where you can place your code to generate content for the tag.

Create "Hello" Tag

Consider you want to define a custom tag named <ex:Hello> and you want to use it in the following fashion without a body −

<ex:Hello />

To create a custom JSP tag, you must first create a Java class that acts as a tag handler.

Let us now create the HelloTag class as follows −

package com.tutorialspoint; import javax.servlet.js