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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
Hibernate Tutorials: Hibernate Case Study Class Hierarchy Persist Example Using Hibernate Interceptor Hibernate Questions with Answer Hibernate Many-to-Many Mapping Example Hibernate one-to-many Mapping Example Hibernate and ORM tools Spring Hibernate Example Hibernate SessionFactory Example Hibernate Mapping Class Hierarchy Hibernate Questions Hibernate SessionFactory Questions Spring Hibernate Example: Spring Hibernate Case Study


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.

In this example, I have tried to provide a very simple end to end
solution by using Struts 2 Tags , such as IF TAG, ITERATOR TAG, 
CHECKBOX TAG, CHECKBOSLIST TAG along with some of basic HTML related
Tags like FORM, textfield, submit etc.

Objective of this example is just to demonstrate ways to use Apache
Struts2 with Action class as plain POJO.



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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 etc.


<%@ taglib uri="/struts-tags" prefix="struts2"%>
<html>
<body>
<h4>Example Registration Page</h4>
<struts2:bean id="so" name="sample.SubscriptionOptions"/>
<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=":"/>
<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.

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.

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 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;
	}
}

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");
        }
}


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

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


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



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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>


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).

Hi, Nice Struts 2 Tag example and well structure code. It helped me a lot by putting together peices of code for Rapid example building and running this example in my local environment. One question though: Suppose there are two more screens after preview screen, with two buttons on preview screen as Edit and Post. On click of Edit button, next screen displayed is an editable screen with all the fields having previous details and on click of Post button, all the preview screen details are to be persisted into database?? What are the various ways one can design and implement this idea? Please help.

Hi Radha, Trying to answer your questions on how to retain checkbox value while editing the form. If you are coming back to the same screen again for editing, then I guess you might have to keep those already enter values in some form within the user session and then provide those value to appropriate element while page load. This is the best I know, just trying to find some ways if any logic available within the tag itself to retain these values automatically. If I come across some ways to do this way, will definitely share the trick over here.

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