Subset Tag (Control Tags) Example Using Count
In this section, we are going to describe the subset
tag using the count parameter. The count parameter indicates the
number of entries to be set in the resulting subset iterator.
Add the following code snippet into the struts.xml
file.
struts.xml
<action name="subsetTagCount" class="net.roseindia.subsetTag">
<result>/pages/genericTags/subsetTagCount.jsp</result>
</action> |
Create a list in the action class and populate it
with various items as shown in the "subsetTag"
class.
subsetTag.java
package net.roseindia;
import com.opensymphony.xwork2.ActionSupport;
import java.util.*;
public class subsetTag extends ActionSupport {
private List myList;
public String execute() throws Exception{
myList = new ArrayList();
myList.add(new Integer(50));
myList.add(new Integer(20));
myList.add(new Integer(100));
myList.add(new Integer(85));
myList.add(new Integer(500));
return SUCCESS;
}
public List getMyList(){
return myList;
}
}
|
Now create a jsp page using <s:subset>
and <s:iterator> tags
as shown in the subsetTag.jsp
page. The subset tag takes an iterator and outputs a subset of it. The
parameter count is of integer type and it sets the number of entries to
be kept in the resulting subset iterator.
subsetTagCount.jsp
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<title>Subset Tag Example!</title>
</head>
<body>
<h1><span style="background-color: #FFFFcc">Subset Tag Example!</span></h1>
<s:subset source="myList" count="3">
<s:iterator>
<s:property /><br>
</s:iterator>
</s:subset>
</body>
</html>
|
Output of Subset Tag:
Output displays only three items because count=3.
|
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