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Param Tag (Data Tag) Example
Posted on: July 20, 2007 at 12:00 AM

In this section, we are going to describe the param tag. The param tag is a generic tag that is used to parameterize other tags.

Param Tag (Data Tag) Example

In this section, we are going to describe the param tag. The param tag is a generic tag that is used to parameterize other tags. For example the include tag and bean tag. The parameters can be added with or without a name as a key.

The param tag has the following two parameters.

name (String) - the name of the parameter
value (Object) - the value of the parameter

Note: When you declare the param tag, the value can be defined in either a value attribute or as text between the start and end tag.
Struts behaves a bit different according to these two situations.

Case 1. <param name="empname">Amit</param> Here the value would be evaluated to the stack as a java.lang.String object.
Case 2. <param name="empname" value="Vinod"/> Here the value would be evaluated to the stack as a java.lang.Object object.

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

struts.xml

<action name="paramTag">
<result>/pages/genericTags/paramTag.jsp</result>
</action>

Now create a jsp page to see the working of the param tags.

paramTag.jsp


<%@ taglib prefix="s" uri="/struts-tags" %>



<html>

  <head>

  <title>Param Tag (Data Tag) Example</title>

  </head>

  <body>

  <h1><span style="background-color: #FFFFcc">Param Tag 

  
(Data Tags) Example!</span></h1>

  <ui:component>

  <ui:param name="empname">Vinod</ui:param><br>

  <ui:param name="empname">Amit</ui:param><br>

  <ui:param name="empname">Sushil</ui:param> 

  </ui:component>

  </body>

</html>

Output of paramTag.jsp:

Related Tags for Param Tag (Data Tag) Example:
c, string, text, parameters, object, include, key, value, tag, parameter, name, attribute, tar, define, start, tex, for, example, add, with, ram, exam, ext, bean, between, e, it, not, can, art, dde, in, no, as, sta, m, out, par, tr, tween, bea, ca, dd, j, ad, cl, declare, without, end, me, obj, param, defined, xa, when, xamp, s, ee, etw, star, at, added, k, inc, ha, ll, meter, note, mpl, follow, ea, and, ar, str, rt, xt, wing, va, tt, tw, s, s, ri, ring, th, st, alu, either, ecl, fin, je, ple, pl, nd, ol, o

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