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Struts Tutorials: Struts2 Tag CheckBoxList
, Checkbox, Iterator, IF Struts2 Tag Library Example Struts2 Tiles Example Struts2 Tiles I18N Example Struts2 Questions Struts Tiles I18N Example Struts Eclipse MVC Struts2 Tags Struts2 Example and Tutorial Struts MVC Struts2 Validation
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Please be informed that NONE of the design/code from this
page is claiming to be some sort of best practices and we DO NOT expect
any of our visitor/reader of this page to assume this as some sort of
best practice for any context and should not be using this 
as it is without appropriate evaluation to their, so to say, 
specific programming context.

This page intends only to provide bit and piece of known ways  for
doing some sort of example and may not be fit for any other purpose.

Extending the already existing example of example registration web application,
that is using textfield, if, checkbox, and checkboxlist Struts2 Tags.
I am goind to add couple of Radio buttons to the exsiting screen, and
try to use Struts2 RadioTag.

Objective of this example is just to demonstrate ways to use Apache
Struts2 with Action class as plain POJO and screens are using Struts2 Tags,
such as IF Tag, TextField Tag, Checkbox Tag, CheckboxList Tag, and now
Radio Tag to be used in this example.



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There are two screens, one is the main screen for user to enter certain
data, and the other screen displays this set of data in form of preview.

User data should flow to the Action class and to corresponding bean
and then this data will be shown in preview form to the user in another
screen.

As shown below:


As shown in this images, we have two screens, so two JSP pages, index.jsp
and preview.jsp files.
index.jsp
The main JSP file that holds some of textfield tag, form tag, checkbox tag
and chechboxlist tag, along with these Tags, I am going to ass Radio Tag as
well etc.


<%@ taglib uri="/struts-tags" prefix="struts2"%>
<html>
<body>
<h4>Example Registration Page</h4>
<struts2:bean id="so" name="sample.SubscriptionOptions"/>
<struts2:bean id="consentOption" name="sample.ConsentOptions"/>
<struts2:form method="post" action="myexample" namespace="/sample">
<table>
<tr><td><struts2:textfield key="myBean.userName" label="Name "/></td></tr>
<tr><struts2:textfield key="myBean.roll" label="Roll "/></td></tr>
<tr><td><struts2:textfield key="myBean.section" label="Section "/></td></tr>
<tr><struts2:textfield key="myBean.stdClass" label="Std/Class "/></td></tr>
<struts2:checkbox key="myBean.newsLetterOption" label="Subscription for News Letters "/>
<struts2:checkboxlist label="Other Subscription Options " key="myBean.subscriptionOptions" list="so" labelSeparator=":"/>
<struts2:radio label="You opinion " key="myBean.consentOptions" list="consentOption" labelSeparator=":"/>
<tr><td colspan="2"><struts2:submit value="Register"/></td></tr>
</table>
</struts2:form>
</body>
</html>


Looking at this JSP file, one can find out the action class name and namespce
action name is myexample and namespace is /sample.
Looking at the struts.xml file, one can find the Action class.
This index.jsp page is just a form that will accept user input and pass on
all these values to corresponding fields in Action class, i.e, MyExample.java.
This will be much clearer once you shall see the corresponding struts.xml
file as shown below:

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>
    <package name="goodexample" namespace="/sample" extends="struts-default">
        <action name="myexample" class="sample.MyExample" method="preview">
	        <result name="preview">/preview.jsp</result>
	    </action>
    </package>
</struts>


So the Action class "sample.MyExample" has a private instance variable 
as myBean and a preview method as follows:

Myexample.java

package sample;
/**
 * This code is provided "AS IS" without any guaranty
 * Use of this code only for educational and learning
 * purpose only.
 * Author: Amit
 * Contact : usingframeworks@gmail.com
 * Date: 16-Feb-2009
 */
import java.util.Map;
/**
 * This is the Action POJO class
 */
public class MyExample {
	private MyBean myBean;
    public String preview() throws Exception {
		return "preview";
    }
    public void setMyBean(MyBean argMyBean) {
        myBean = argMyBean;
    }
    public MyBean getMyBean() {
        return myBean;
    }
}


Now Mybean is the class that is holding all the variables those will
be accepting values from Struts2 Tags from index.jsp file.
Now I am going to add another variable "consentOptions" of type java.util.List
and corresponding setter and getter methods.

MyBean.java

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

public class MyBean
{
	private String userName;
	private String roll;
	private String section;
	private String stdClass;
	private List subscriptionOptions;
	private List consentOptions;
	private boolean newsLetterOption;

	public String getUserName() {
		return this.userName;
	}
	public void setUserName(String argUserName) {
		userName = argUserName;
	}
	public String getRoll() {
		return this.roll;
	}
	public void setRoll(String argRoll) {
		roll = argRoll;
	}
	public String getSection() {
		return this.section;
	}
	public void setSection(String argSection) {
		section = argSection;
	}
	public String getStdClass() {
		return this.stdClass;
	}
	public void setStdClass(String argStdClass) {
		stdClass = argStdClass;
	}
	public List getSubscriptionOptions() {
	    return subscriptionOptions;
	}
	public void setSubscriptionOptions(List argSubscriptionOptions) {
		subscriptionOptions = argSubscriptionOptions;
	}
	public void setNewsLetterOption(boolean argNewsLetterOption) {
		newsLetterOption = argNewsLetterOption;
	}
	public boolean getNewsLetterOption() {
		return newsLetterOption;
	}
	public void setConsentOptions(List argConsentOptions) {
        consentOptions = argConsentOptions;
	}
	public List getConsentOptions() {
		return consentOptions;
	}
}


And another class file that holds all the hard coded subscription options
for this example, those are to be shown in checkbox list as labels.

SubscriptionOptions.java

package sample;
import java.util.ArrayList;

public class SubscriptionOptions extends ArrayList
{
        public SubscriptionOptions() {
          super();
          add("Technical Support");
          add("Business Support");
          add("HR Support");
          add("Help Desk Emails");
        }
}


Just like Subscription options, I have introduced another class "ConsentOptions.java".
This class file holds all the labels for the radio buttons, like for this example,
these are "Agree" and "Disagree" .
ConsentOptions.java

package sample;
import java.util.ArrayList;

public class ConsentOptions extends ArrayList
{
	public ConsentOptions() {
          super();
          add("Agree");
          add("Disagree");
	}
}


Once all the fields in MyBean are populated with values from index.jsp
screen, then these values are to be shown in preview page, so comes the
preview.jsp file. There is a slight change in this preview.jsp file, to include
Radio button selectioned value, either Agree or Disagree.

preview.jsp

<%@ taglib uri="/struts-tags" prefix="struts2"%>
<html>
<head></head>
<body>
<h2>Preview Page</h2>
<table>
<tr><td>
<b><font color="green">Name : </font>
</td><td><struts2:property value="myBean.userName"/></td></tr>
<tr><td><b><font color="green">Roll No. : </font></b></td><td>
<struts2:property value="myBean.roll"/></td></tr>
<tr><td><b><font color="green">Section : </font>
</b></td><td><struts2:property value="myBean.section"/></td></tr>
<tr><td><b><font color="green">Std/Class : </font>
</b></td><td><struts2:property value="myBean.stdClass"/></td></tr>
<tr><td>
<b><font color="green">New Letter Subscription :</font></b></td><td>
<struts2:if test="myBean.newsLetterOption">
Yes
</struts2:if>
<struts2:else>
No
</struts2:else>
</td></tr>
<tr><td valign="top"><b><font color="green">Other Subscription Options:</font></b></td><td>
<struts2:iterator id="a" value="myBean.subscriptionOptions">
<struts2:property value="a"/>
<br>
</struts2:iterator>
</td></tr>

<tr><td valign="top"><b><font color="green">User consent Option selected :</font></b></td><td>
<struts2:iterator id="b" value="myBean.consentOptions">
<struts2:property value="b"/>
<br>
</struts2:iterator>
</td></tr>

</table>
</body>
</html>


If you are interested in setting up this example in tomcat web server,
following are some other files details such as

web.xml

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

<!DOCTYPE web-app
    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
    "http://java.sun.com/dtd/web-app_2_3.dtd">

<web-app>
    <display-name>Struts Blank</display-name>
  <filter>
  <filter-name>sample-filter</filter-name>
  <filter-class> 
    org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
  </filter-class>
  </filter>
  <filter-mapping>
    <filter-name>sample-filter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>




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And as I am using Struts 2.1.6 version, then you may have to download
all dependent JAR files from 
http://struts.apache.org/download.cgi

Author of this article/writeup has expressed his/her willingness

to help or guide users with any technical difficulties he/she faces while working with the example code environment setting up, running and resolving any such exception raised during compile or at runtime. You may ask for any technical doubt or seek technical help related to this article by using following form to reach for technical help from the Author for FREE. This article's Author shall be reading your request and responding within reasonable time (no resolution timeframe defined as such).

I'm trying to display a list of objects resulting from a query with option to select one of the results by using a radio button. but since i'm using a struts2 radio tag, the display is happening in the horizontal direction. i want to make a scrollable display with one result in each row with a corresponding radio button. thanks in advance sree

In this existing example, by providing template and appropriate radio1.ftl file, as shown below: <struts2:radio label="You opinion " key="myBean.consentOptions" list="consentOption" labelSeparator=":" template="radio1"/> radio1.ftl located in /template/xhtml/radio1.ftl <tr><td colspan="2"> <table> <tr><td valign="top"> Your Opinion: </td><td> <div> <#list consentOption as c> <input type="radio" name="myBean.consentOptions" />${c}<br/> </#list> </div> </td></tr></table> </td></tr> This is showing the radio button one below the other. Possibilities are endless and one can try to show UI components the way one desire. I am not saying this is a better way of doing or achieving this objective but one can explore Freemaker and many more utilities for doing this.

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