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.
Create action classes:
First of all let us create a simple class called ControlTagAction.java which looks like:
package com.dineshonjava.struts2.action;
import java.util.ArrayList;
import java.util.List;
import com.opensymphony.xwork2.ActionSupport;
/**
* @author Dinesh Rajput
*
*/
public class ControlTagAction extends ActionSupport{
private static final long serialVersionUID = 1L;
private List<String> userList;
public String execute() {
userList = new ArrayList<String>();
userList.add("Dinesh");
userList.add("Sweety");
userList.add("Aadesh");
userList.add("Vinesh");
userList.add("Sandhya");
userList.add("Rajput");
return SUCCESS;
}
public List<String> getUserList() {
return userList;
}
public void setUserList(List<String> userList) {
this.userList = userList;
}
}
Create views
Create a file called users.jsp with the following contents:
<%@ 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="userList"> <s:property /><br> </s:iterator> </body> </html>
Configuration Files
Your struts.xml should look like:
<?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>
<constant name="struts.enable.DynamicMethodInvocation" value="false" />
<constant name="struts.devMode" value="false" />
<constant name="struts.custom.i18n.resources" value="myapp" />
<package name="default" extends="struts-default" namespace="/">
<action name="users" class="com.dineshonjava.struts2.action.ControlTagAction">
<result name="success">/users.jsp</result>
</action>
</package>
</struts>
Your web.xml should look like:
<?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_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>Struts2ControlTags</display-name>
<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>
Right click on the project name and click Export > WAR File to create a War file. Then deploy this WAR in the Tomcat’s webapps directory. Finally, start Tomcat server and try to access
URL http://localhost:8080/doj/users.
This will give you following screen:
Download Source Code
Struts2ITERATOR_Tag.zip
