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Subset Tag (Control Tags) Example Using Start

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In this section, we are going to describe the subset tag using the start parameter. The start parameter is of integer type.

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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Posted on: July 17, 2007

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