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Subset Tag (Control Tags) Example Using Count

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In this section, we are going to describe the subset tag using the count parameter. The count parameter indicate the number of entries to be set in the resulting subset iterator.

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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Posted on: July 17, 2007

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