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Output of the includeTag.jsp
5. Param Tag (Data Tag) Example
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 behave 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.
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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/dataTags/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 Example</title>
</head>
<body>
<h2>Param Tag Example</h2>
<ui:component>
<ui:param name=”empname”>Emp1</
ui:param><br>
<ui:param name=”empname”>Emp2</
ui:param><br>
<ui:param name=”empname”>Emp3</
ui:param>
</ui:component>
</body>
</html>
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Jan 2008 | Java Jazz Up | 47 |
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