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| Struts2 Tags |
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evaluates to ‘false’ and <s:elseif > tag evaluates
to ‘true’ then the body of the <s:elseif > tag is
processed. If the condition in <s:if > tag and <s:elseif > tags evaluates to ‘false’ then only
the <s:else > tag is processed.
IfControlTag.jsp
<%@ taglib prefix=”s” uri=”/struts-tags” %>
<html>
<head>
<title>Struts 2 if/elseif/else Control Tag
Example</title>
</head>
<body>
<s:set name=”technologyName”
value=”%{‘Java’}”/>
<s:if
test=”%{#technologyName==’Java’}”>
<div><s:property
value=”%{#technologyName}” /></div>
</s:if>
<s:elseif
test=”%{#technologyName==’Jav’}”>
<div><s:property
value=”%{#technologyName}” /></div>
</s:elseif>
<s:else>
<div>Technology Value is not Java</
div>
</s:else>
</body>
</html>
In the IfControlTag.jsp only <s:if> tag
evaluates to true, we get the output equal to “Java”.
Output:
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2. Append Tag (Control Tags) Example
The append tag is a generic tag that is used
to merge multiple iterators into one iterator.
Append Iterator tag is used to append
iterators to form an appended iterator
through which the entries goes from one
iterator to another after each respective
iterator is exhausted of entries. Create two
lists in the action class and populate them
with various items as shown in the“AppendTag” class.
AppendTag.java
package net.javajazzup;
import
com.opensymphony.xwork2.ActionSupport;
import java.util.*;
public class AppendTag extends
ActionSupport{
private List list1;
private List list2;
public String execute()throws Exception{
list1 = new ArrayList();
list1.add(“JAVA”);
list1.add(“HTML”);
list1.add(“CSS”);
list1.add(“AJAX”);
list1.add(“JAVA SCRIPT”);
list2 = new ArrayList();
list2.add(“Soft. Engg.”);
list2.add(“Sr. Soft. Engg.”);
list2.add(“Team Leader”);
list2.add(“Project Manager”);
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Dec 2007 | Java Jazz Up | 42 |
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