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Radio Tag :

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html:radio Tag - This Tag renders an HTML element of type radio, populated from the specified property of the bean associated with our current form.

Radio Tag <html:radio>:

     

html:radio Tag - This Tag renders an HTML <input> element of type radio, populated from the specified property of the bean associated with  our current form.

Note : This tag is only valid when nested inside a form tag body.

Name Description
disabled The disabled attribute set to true if this input field should be disabled.
name The attribute name of the bean whose properties are consulted when rendering the current value of this input field. If not specified, the bean associated with the form tag we are nested within is utilized
property The corresponding bean property for this radio tag.
value The value of the radio tag.

Example Illustrating the use of the Radio<html:radio> tag.
Here you will learn to use the Struts Html <html:radio> tag. 
We will cover an example that will show a working of<html:radio> tag.

Example code :
Creating Form Bean
Develop a simple Form Bean  class RadioTagActionForm.java

package ActionForm;

import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;

public class RadioTagActionForm extends 
org.apache.struts.action.ActionForm{

  
  
  private String indian;
  
  private String american;
  
  public String getIndian() {
  return indian;
  }
  
  public void setIndian(String string) {
  indian = string;
  }
  public String getAmerican() {
  return american;
  }
  
  public void setAmerican(String string) {
  american = string;
  }
  
  public RadioTagActionForm() {
  super();
  
  }

}

Creating an Action Class :

Develop a simple action class RadioTagAction .java.


package action;

import ActionForm.RadioTagActionForm;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForward;

public class RadioTagAction extends Action {
 
 private final static String SUCCESS = "success";
  
 public ActionForward execute(ActionMapping mapping, ActionForm  form,
  HttpServletRequest request, HttpServletResponse response)
  throws Exception {
  
  if(form!=null){
  
 RadioTagActionForm radiaTagActionForm=(RadioTagActionForm)form;
 System.out.println("radiaTagActionForm"
+radiaTagActionForm.getAmerican
());
 }  
  return mapping.findForward(SUCCESS);
  
  }
}

Defining form Bean in struts-config.xml file :
Add the following entry in the struts-config.xml file for defining the form bean .
<form-bean name="RadioTagActionForm" type="ActionForm.RadioTagActionForm"/>

Developing the Action Mapping in the struts-config.xml
Here, Action mapping helps to select the Form Bean, Action Class etc, specific requests.

<action input="/" name="RadioTagActionForm" path="/RadioTagAction" 
  
scope="request" type="action.RadioTagAction" validate="false">

<forward name="success" path="/redioTagOutPut.jsp"/>

</action>

Developing the RadioTag.jsp page :

<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>
<%taglib uri="http://jakarta.apache.org/struts/tags-bean" prefix="bean" %>
<%taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html" %>
<%taglib uri="http://jakarta.apache.org/struts/tags-logic" prefix="logic"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">

<html>
  <head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <title>RadioTag</title>
  <font color="#FFFF33">Plz select Option for Demo  ---></font>s
  </head>
 <body bgcolor="#999933"
  <h3><font color="#FFFF33">RadioTag</font></h3>  
  <html:form action="/RadioTagAction">  
  <h3>Indian</h3><html:radio name="RadioTagActionForm" 
  
property="indian" value="Indian"  disabled="false"/>
  <h3>American</h3><html:radio name="RadioTagActionForm" 
  property=
"american" value="American" disabled="false"/>
  <html:submit/>
  </html:form>
  
  </body>
</html>
 

Developing the redioTagOutPut.jsp page :

<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>
<%taglib uri="http://jakarta.apache.org/struts/tags-bean" prefix="bean" %>
<%taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html" %>
<%taglib uri="http://jakarta.apache.org/struts/tags-logic" prefix="logic"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
  <head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <title><font color="#FFFF33">OUT PUT</font></title>
  </head>
 <a href="RadioTag.jsp">Go Back.........</a><br/> 
  <body bgcolor="#999933">
  
  <h3><font color="#FFFF33">OUT PUT</font></h3> 
  <h3><font color="#FFFF33">Selected Value is.......</font></h3>
  <bean:write name="RadioTagActionForm" property="indian"/>
  <bean:write name="RadioTagActionForm" property="american"/>
  
  </body>
</html>

Add the following line in the index.jsp to call the form.

<a href="RadioTag.jsp">RadioTagDemo</a><br/>

Building and Testing the Example  :
Build and deploy and Test  the application . Open the browser and navigate to the RadioTag.jsp page. 
Your browser displays the following page.

Don't select  option  on the RadioTag.jsp  page, and see the output.

Output:

Now select the option on  the RadioTag.jsp ,

Output:

Above demo  Displays the working of<html:radio>tag.

     
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Posted on: January 10, 2008

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Comments:2
Lan
October 7, 2011
Using a radio tag to set a form property

I'm new-ish to struts and I'm particularly stuck on an area of struts code which has to do with the radio button. no matter what I do I can't get anything but a false value from the following: (CostForm) <td align="left" width="200px" colspan="2"> <html:radio property="responsableBool" value="false"/>No <html:radio property="responsableBool" value="true"/>Yes </td> It is then initialised from this piece of code: CostForm costform = (CostForm) form; Cost cost= new Cost(); costform.populateModel(cost); and the populateModel just has: PropertyUtils.copyProperties(cost,this);
Lan
October 7, 2011
Using two radio properties to set a value

I'm new-ish to struts and I'm particularly stuck on an area of struts code which has to do with the radio button. no matter what I do I can't get anything but a false value from the following: (CostForm) <td align="left" width="200px" colspan="2"> <html:radio property="responsableBool" value="false"/>No <html:radio property="responsableBool" value="true"/>Yes </td> It is then initialised from this piece of code: CostForm costform = (CostForm) form; Cost cost= new Cost(); costform.populateModel(cost); and the populateModel just has: PropertyUtils.copyProperties(cost,this);
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