Iterator Tag (Control Tags) Example

In this section, we are going to describe the Iterator tag. Iterator tag is used to iterate over a value. An iterable value can be either of: java.util.Collection, java.util.Iterator.

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

struts.xml

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

Create an action class as shown:

iteratorTag.java


package net.roseindia;

import com.opensymphony.xwork2.ActionSupport;

import java.util.*;



public class iteratorTag extends ActionSupport{

  

  private List myList;

  

  public String execute()throws Exception{

    myList = new ArrayList();

    myList.add("Fruits");

    myList.add("Apple");

    myList.add("Mango");

    myList.add("Orange");

    myList.add("Pine Apple");

    return SUCCESS;

  }



  public List getMyList(){

    return myList;

  }

}

The following example retrieves the value of the getMyList() method of the current object on the value stack and uses it to iterate over. The <s:property/> tag prints out the current value of the iterator.

iteratorTag.jsp


<%@ taglib prefix="s" uri="/struts-tags" %>



<html>

  <head>

    <title>Iterator Tag Example!</title>

  </head>

  <body>

    <h1><span style="background-color: #FFFFcc">Iterator Tag Example!</span></h1>

      <s:iterator value="myList">

        <s:property /><br>

      </s:iterator>

  </body>

</html>

Output of An Iterator Tag Example:

Current Comments

6 comments so far (post your own) View All Comments Latest 10 Comments:

Respected Sir,

I want to hold a unique names for the <s:select ----/> tags during its loop.
for example:
****************************************************
<s:iterator value="xyz">
<s:select name="a" headerKey="1" headerValue="--Select --"
list="sortedRatings" />
</s:iterator>
******************************************************
Here in the code for each iteration i want to assign a unique name.

Is it possible or not

Posted by kishore on Saturday, 10.11.08 @ 16:35pm | #81017

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Hi I am trying to display a ArrayList of lists using struts2 iterator tag.

private void dataReady(){
for (int itr = 0; itr < 12; itr++)
{
tempList = new ArrayList();
for(int tillItr = 0; tillItr < this.terminalList.size(); tillItr++)
{
tempList.add(this.transactions[itr][tillItr]);
tempList.add(this.unitsSold[itr][tillItr]);
}
tempList.add(this.peakBlocks[itr]);
tempList.add(this.incCtr[itr]);
tempList.add(this.percentages[itr]);
this.dataList.add(tempList);
}
}

Now I have tempList which is a list of int and long values and dataList which is a list of tempLists.

I need to use the struts2 iterator tag and display it on the screen.

Is there any way of doing it?

If Iterator is not possible then is there anything else I can use?

Posted by Amol on Wednesday, 09.10.08 @ 20:22pm | #78542

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Hi,

I am trying to iterarte a session variable of type HashMap<String, List> using the following code, but it's not producing any markup..

<s:iterator value="#session.physicalArchives" id="physicalArchives">
<s:property value="key" />
<s:property value="value"/>
</s:iterator>

Posted by Rushikesh on Monday, 02.11.08 @ 17:53pm | #47908

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How can I edit the elements in the collection. Is there a way to create textfields for every fruit on one page and allow editing their names?

Posted by Piotr Falenczyk on Thursday, 02.7.08 @ 18:38pm | #47524

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How to iterate among nested arraylist collection..?

Posted by Sawan on Tuesday, 07.31.07 @ 09:54am | #22274

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How to pass any list object back to action class?
Suppose list containes a set of user object. And in my action class I want all the user object in the list.

Posted by Arpan on Friday, 07.27.07 @ 15:07pm | #22045

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