DynaActionForm Example Continued...

text zoom

Previous: Introduction to DynaActionForm Struts solution to Duplicate Form Submission (Token mechanism) :Next

2) ActionClass

package com.visualbuilder;

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

import org.apache.struts.action.ActionMessages;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
import org.apache.struts.actions.Action;

import org.apache.struts.action.DynaActionForm;

public class DynaActionFormExample extends Action{

public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
throws Exception {
DynaActionForm inputForm = (DynaActionForm)form;

        //Create object of ActionMesssages
                ActionMessages errors = new ActionMessages();
        //Check and collect errors
        if(((String)inputForm.get("name")).equals("")) {
                        errors.add("name",new ActionMessage("error.name.required"));
                 }
        if(((String)inputForm.get("email")).equals("")) {
                         errors.add("email",new ActionMessage("error.email.required"));
                }
        //Saves the error
                saveErrors(request,errors);
        return mapping.getInputForward();
      }

}

(3) JSP Page

<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html:html>
<logic:messagesPresent>
<html:messages id="msg">
<bean:write name="msg" />
</html:messages>
</logic:messagesPresent>

<logic:messagesPresent message="true">
<html:messages message="true" id="msg">
<bean:write name="msg" />
</html:messages>
</logic:messagesPresent>
<html:form action="/dynaActionExample.do" method="post">
<table>
<tr><td>Enter the name :- </td><td><html:text property="name"/> </td></tr>
<tr><td>Enter the Email:- </td><td><html:text property="email"/></td></tr>
</table>
<html:submit>Submit</html:submit>
</html:form>