Subset Tag (Control Tags) Example

In this section, we are going to describe the subset tag. The subset tag is a generic tag that takes an iterator and outputs a subset of it. It delegates to org.apache.struts2.util.SubsetIteratorFilter internally to perform the subset functionality.

Add the following code snippet into the struts.xml file.

struts.xml

<action name="subsetTag" class="net.roseindia.subsetTag">
<result>/pages/genericTags/subsetTag.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.

subsetTag.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">

  <s:iterator>

  <s:property /><br>

  </s:iterator>

  </s:subset>

  </body>

</html>

Output of Subset Tag:

Subset Tag (Control Tags) Example

Subset Tag (Control Tags) Example

Subset Tag (Control Tags) Example

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