Struts 2 Iterator Tag Example

Let us see how to use iterator tag in struts 2, actually iterator is the best tag to use rather writing while loop to print collection of objects in jsp’s.  if we use while loop we may need to write 4 – 5 lines but we can get the same result with iterator with 1 line hah.

Example

required files….

• index.jsp
• success.jsp
• web.xml
• struts.xml
• LogingEx.java

Directory Structure

index.jsp

<META HTTP-EQUIV="Refresh" CONTENT="0;URL=iteAction.action">

success.jsp

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

  <h1>Iterator_Values</h1>
  <s:iterator value="countries">

     <s:property /><br>

  </s:iterator>
  </body>
</html>

LogingEx.java

package java4s;
import java.util.ArrayList;
import java.util.List;

import com.opensymphony.xwork2.ActionSupport;

public class LogingEx extends ActionSupport{
    private static final long serialVersionUID = 1L;
    private List countries;

    public List getCountries()
    {
          return countries;
    }

    public String execute()
    {
        countries = new ArrayList();

        countries.add("Uganda");
        countries.add("Ukraine");
        countries.add("United States");
        countries.add("United Arab Emirates");
        countries.add("United Kingdom");
        countries.add("Uruguay");
        countries.add("Uzbekistan");

        return SUCCESS;
    }

}

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>

struts.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
    <include file="struts-default.xml"/>
    <package name="a" extends="struts-default">
        <action name="iteAction" class="java4s.LogingEx">
            <result name="success">/success.jsp</result>
        </action>
    </package>
</struts>

Output

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::. About the Author .::
		Sivateja Kandula - Java/J2EE Full Stack Developer Founder of Java4s - Get It Yourself, A popular Java/J2EE Programming Blog, Love Java and UI frameworks. You can sign-up for the Email Newsletter for your daily dose of Java tutorials.