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| Struts2 Tags |
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9. 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. Create a list in the action class and
populate it with various items as shown in the “SubsetTag” class.
SubsetTag.java
package net.javajazzup;
import
com.opensymphony.xwork2.ActionSupport;
import java.util.*;
public class SubsetTag extends ActionSupport
{
private List list;
public String execute() throws Exception{
list = new ArrayList();
list.add(new Integer(100));
list.add(new Integer(200));
list.add(new Integer(300));
list.add(new Integer(150));
list.add(new Integer(400)); |
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return SUCCESS;
}
public List getList(){
return list;
}
}
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>
<h2>Subset Tag Example</h2>
<s:subset source=”list” count=”3">
<s:iterator>
<s:property /><br>
</s:iterator>
</s:subset>
</body>
</html>
Output:
Output displays only three items because
count=3.
10. Subset Tag (Control Tags) Example
Using Start
In this section, we are going to describe the
subset tag using the start parameter. The
start parameter is of integer type. It
indicates the starting index (eg. first entry is
0) of entries in the source (needed to make
available as the first entry in the resulting
subset iterator). Create a list in the action
class and populate it with various items as
shown in “SubsetTag” class.
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Dec 2007 | Java Jazz Up | 49 |
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