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Struts2 - Optgroup Tag (Form Tags)

In this section, we are going to describe the optgroup tag. The optgroup tag is a UI tag that creates an optgroup component which needs to reside within a select tag <s:select>.

Add the following code snippet into the struts.xml file.

struts.xml
<action name="optgroupTag">
   <result>/pages/uiTags/optgroupTag.jsp</result>
</action>

Create a jsp using the tag <s:optgroup> within the <s:select> tag. It creates an optgroup component. This tag contains few parameters:
The label parameter sets the label attribute In our case we have set it to "Hardware" and "Software".


optgroupTag.jsp

<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
  <head>
  <title>Optgroup Tag Example!</title> 
  </head>
  <body>
 <h1><span style="background-color: #FFFFcc">Optgroup Tag Example!
</span></h>
 <s:form>
 <s:select label="Please Select"
  name="select"
 list="%{#{'PROGRAMMING':'Programming', 'DATABASE':'DataBase',
   'WEBAPPLICATION':'WebApplication'}}">
  <s:optgroup label="Hardware"
  list="%{#{'CPU':'Centeral Processing Unit','MOUSE':'Mouse',
    'KEYBOARD':'Keyboard'}}" />
  <s:optgroup label="Software"
  list="%{#{'SYSTEM SOFTWARE':'System Software','APPLICATION 
  SOFTWARE':'Application Software'}}" />
  </s:select>
  </s:form>
  </body>
</html>

Output of the optgroupTag.jsp:

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