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).
Add the following code snippet into the struts.xml
file.
struts.xml
<action name="subsetTagStartWith" class="net.roseindia.subsetTag">
<result>/pages/genericTags/subsetTagStartWith.jsp</result>
</action> |
Create a list in the action class and populate it
with various items as shown in "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 start
is of integer type and 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).
subsetTagStartWith.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" start="2">
<s:iterator>
<s:property /><br>
</s:iterator>
</s:subset>
</body>
</html>
|
Output of Subset Tag:
Here the items displayed are 100, 85, 500. Items displayed starts from
2nd index of the List.
|
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