In Struts2 login validation, when we submitt the form without input then it shows error but when we again submit it then it doesnt call setter and then it hang out also.

**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>
    <constant name= struts.enable.DynamicMethodInvocation  value= false  />
    <constant name= struts.devMode  value= false  />
    <constant name= struts.convention.result.path  value= /pages  />
    <constant name= struts.convention.action.packages  value= com.icici.recon  />
    <constant name= struts.custom.i18n.resources  value= global  />

    <package name= default  extends= struts-default, json-default  namespace= / >
        <action name= index  class= com.credentek.recon.sms.action.IndexAction >
            <result>/pages/index.jsp</result>
        </action>

        <action name= indexLogin  class= com.credentek.recon.sms.action.IndexAction  method= login >
            <result>/pages/sms/login.jsp</result>
        </action>

        <action name= login  class= com.credentek.recon.sms.action.LoginAction >
            <result >/pages/sms/login.jsp</result>
        </action>

        <action name= showmenu  class= com.credentek.recon.sms.action.LoginAction  method= showmenu >
            <result name= success >pages/menu/menu.jsp</result>
            <result name= error >pages/menu/blank1.jsp</result>
        </action>

    </package>
</struts>



**LoginAction.java**

package com.credentek.recon.sms.action;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.lang.StringUtils;
import org.apache.log4j.Logger;
import org.apache.struts2.ServletActionContext;
import org.apache.struts2.interceptor.SessionAware;
import com.credentek.recon.sms.dao.LoginDAO;
import com.credentek.recon.sms.dao.LoginDAOImpl;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class LoginAction extends ActionSupport implements SessionAware {

    private static final long serialVersionUID = -8841529855335717596L;

    private final Logger log = Logger.getLogger(LoginAction.class);

    private Map<String, Object> session;
    private String userID;

    private String welcomeDetails;
    private String loginDetails;

    private boolean implementationStatus;

    private String subSystem;


    private LoginDAOImpl loginDAO = new LoginDAOImpl();


    public String execute() {

        log.info( Loading login page... );

        log.info( Login page loaded successfully. );

        return SUCCESS;
    }

    public String showmenu() {

        log.info( showmenu  );
System.out.println( show menu.... );
        if(userID.equalsIgnoreCase(  ) || userID == null){
            System.out.println( no user ID..... );
            return ERROR;
        }
        System.out.println( USER ID..... );
        HttpServletRequest request = (HttpServletRequest) ActionContext
        .getContext().get(ServletActionContext.HTTP_REQUEST); 

        log.info( Validating login information... );

        String dateFormat = loginDAO.getDateFormat();
        if(!  .equals(dateFormat)) {
            session.put( dateFormat , dateFormat);
            log.info( Date Format set to   + dateFormat);
        } else {
            session.put( dateFormat ,  dd/MM/yyyy );
            log.error( Date Format is not set properly, please set dateFormat parameter in Parameter table );
        }

        SimpleDateFormat sdf = new SimpleDateFormat(dateFormat); 

        String businessDate =  sdf.format(new Date());

        session.put( userID , userID);
        session.put( userName , userID); 
        session.put( businessDate ,  30/04/2012 );
        session.put( subSystem , subSystem);
        String moduleID = loginDAO.getModuleDetails(subSystem);

        log.info( moduleID is set to   + moduleID );    

        session.put( moduleID , moduleID);

        session.put( lastLoginDate ,    );
        session.put( lastBusinessDate ,    );
        session.put( currencyFormat ,    );

        dateFormat = dateFormat.replace( yy ,  y );
        dateFormat = dateFormat.replace( E ,  D );
        dateFormat = dateFormat.replace( DD ,  D );
        if(StringUtils.countMatches(dateFormat,  MMMM ) == 1)
            dateFormat = dateFormat.replace( MMMM ,  MM );
        else if(StringUtils.countMatches(dateFormat,  MMM ) == 1)
            dateFormat = dateFormat.replace( MMM ,  M );
        else if(StringUtils.countMatches(dateFormat,  MM ) == 1)
            dateFormat = dateFormat.replace( MM ,  mm );
        else if(StringUtils.countMatches(dateFormat,  M ) == 1)
            dateFormat = dateFormat.replace( M ,  m );

        session.put( datePickerFormat , dateFormat);
        log.info( DatePicker format set to   + dateFormat); 

        log.info( Login successfull. Login Information =   + session);

        welcomeDetails =  Welcome   + userID;

        sdf = new SimpleDateFormat( dd MMMM, yyyy HH:mm:ss z );
        loginDetails =  Current Login :   + sdf.format(new Date());

        log.info( Login Details: User-   + userID +  ,   + loginDetails);

        implementationStatus = true;

        request.getSession().setMaxInactiveInterval(60 * 60); 

        return SUCCESS;
    }

    public void setSession(Map<String, Object> session) {
        this.session = session;
    }

    public String getUserID() {
        return userID;
    }

    public void setUserID(String userID) {
        this.userID = userID;
    }

    public String getWelcomeDetails() {
        return welcomeDetails;
    }

    public void setWelcomeDetails(String welcomeDetails) {
        this.welcomeDetails = welcomeDetails;
    }

    public String getLoginDetails() {
        return loginDetails;
    }

    public void setLoginDetails(String loginDetails) {
        this.loginDetails = loginDetails;
    }

    public boolean isImplementationStatus() {
        return implementationStatus;
    }

    public void setImplementationStatus(boolean implementationStatus) {
        this.implementationStatus = implementationStatus;
    }

    public String getSubSystem() {
        return subSystem;
    }

    public void setSubSystem(String subSystem) {
        this.subSystem = subSystem;
    }

}



**index.jsp**

<%@ page language= java  contentType= text/html; charset=ISO-8859-1 
   pageEncoding= ISO-8859-1 %>

<%@ taglib prefix= s  uri= /struts-tags %>
<%@ taglib prefix= sj  uri= /struts-jquery-tags %>

<!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  />
    <meta http-equiv= Content-Style-Type  content= text/css  />
    <meta http-equiv= pragma  content= no-cache  />
    <meta http-equiv= cache-control  content= no-cache  />
    <meta http-equiv= expires  content= 0  />
    <meta http-equiv= keywords  content= struts2, jquery, jquery-ui, plugin, showcase, jqgrid  />
    <meta http-equiv= description  content= Debit Card Reconciliation System  />

    <link href= styles/layout.css  rel= stylesheet  type= text/css  />

    <link rel= stylesheet  href= styles/styles.css  type= text/css  />  

    <!--[if lte IE 7]>
        <link href= styles/patch_layout.css  rel= stylesheet  type= text/css  />
    <![endif]-->

    <!-- This files are needed for AJAX Validation of XHTML Forms -->
    <script type= text/javascript  src= ${pageContext.request.contextPath}/struts/utils.js ></script>
    <script type= text/javascript  src= ${pageContext.request.contextPath}/struts/xhtml/validation.js ></script>

    <script type= text/javascript  src= js/jquery.js ></script>

    <sj:head debug= true  compressed= false  jquerytheme= humanity  loadFromGoogle= false  ajaxhistory= false  defaultIndicator= myDefaultIndicator  defaultLoadingText= Please wait ... />

    <!-- This file includes necessary functions/topics for validation and all topic examples -->
    <script type= text/javascript  src= js/showcase.js ></script>
    <script type= text/javascript  src= js/common.js ></script>
    <script type= text/javascript  src= js/right.js ></script>
    <script type= text/javascript  src= js/date.js ></script>

    <script type= text/javascript  src= js/ui/jquery.ui.datepicker.js ></script>
    <script type= text/javascript  src= js/jquery.tablesorter.js ></script>
    <script type= text/javascript  src= js/jquery.tablesorter.pager.js ></script>
    <script type= text/javascript  src= js/jquery.tablesorter.filter.js ></script>
    <script type= text/javascript  src= js/ui/jquery.ui.core.js ></script>
    <script type= text/javascript  src= js/ui/jquery.ui.widget.js ></script>
    <script type= text/javascript  src= js/ui/jquery.ui.mouse.js ></script>
</head>

<body>
    <div class= page_margins >
        <div class= page >
            <table width= 100%  border= 0  class= ui-widget-header >
            <tr>
                <td width= 40% ><div id= headline >
                    <h1 class= ui-state-default  style= background: none; border: none; >Login Attempt </h1>
                    <h4 class= ui-state-default  style= background: none; border: none; >Login  <i><small>Login</small></i></h4>
                    <img id= myDefaultIndicator  src= images/ajax-loader.gif  alt= Loading...  style= display:none />
                </div></td>
                <td width= 30% ><div id= subSystemInfo  class= ui-state-default  style= background: none; border: none;font-size: 20px; ></div> </td>

                <td width= 30% >
            <div >
                <div style= float: right; >                 
                    <s:form id= themeform  action= setlocale  theme= simple >
                        <div id= languageBox >
                            <span>

                            </span>
                            <span>

                            </span>
                        </div>
                        <sj:submit id= submitForm  formIds= themeform  listenTopics= formTopic  cssStyle= display: none;  />

                    </s:form>

                    <div class= ui-state-default  style= background: none; border: none; padding-top: 3px; padding-bottom: 3px; float: right; ><span id= userInfo ></span><span><a id= logout  href= index.action ></a></span></div><br>

                    <div id= loginInfo  class= ui-state-default  style= background: none; border: none;float: right; ></div>

                </div>



            </div>
            </td>
            </tr>
            </table>

            <div id= menu ></div>

            <s:url id= urlLogin  action= login  />
            <sj:div id= main  href= %{urlLogin}  cssStyle= height:320px >
                <img id= indicator  src= images/indicator.gif  alt= Loading...  />
            </sj:div>

            <!-- begin: #footer -->
            <div id= footer >
                Copyright © 2012, CredenTek Software & Consultancy Private Limited. <a href= http://www.credentek.com/  target= _blank >www.credentek.com</a>
            </div>
        </div>
    </div>

    <div class= curtain  id= loading-filter  style= display:none; height: 850px; >
        <div style= margin-top: 200px; text-align: center; >  
            <img src= images/loading.gif  width= 110  height= 90  alt= loading ... />
        </div>
    </div>
</body>
</html>



**login.jsp**

<%@ taglib prefix= s  uri= /struts-tags %>
<%@ taglib prefix= sj  uri= /struts-jquery-tags %>

<div id= col3  align= center  style= width: 100%; >
    <div id= col3_content  align= center  class= clearfix  style= width: 90%; >
        <s:url id= urlShowMenu  action= showmenu />
        <%-- <sj:a id= loginLink >Login</sj:a> --%>

        <table cellpadding= 0  cellspacing= 7   border= 0  width= 100% >
            <tr valign= top >
                <td width= 35% ><img src= images/icicibank.jpg  width= 250px ></td>
                <td><br></br><br></br><br></br></td>
                <td  width= 35%  align= right >
                </td>
            </tr>
            <tr>
                <td>
                </td>
                <td>
                    <h4 class= ui-state-default  style= background: none; border: none; >Login</h4>
                </td>
                <td>
                </td>
            </tr>

            <tr>
                <td></td>
                <td>
                <hr></hr>
                </td>
                <td></td>
            </tr>

            <tr>
                <td></td>
                <td>
                    <s:form id= loginForm  theme= simple >
                    <table cellpadding= 0  cellspacing= 15  border= 3  width= 100%  >


                        <tr style= border:0px; >
                            <td width= 50%  style= border:0px;  align= left >User Name </td>
                            <td width= 50%  style= border:0px; >
                                <s:textfield id= userID  cssClass= searchInputText  name= userID ></s:textfield>
                            </td>
                        </tr>
                        <tr style= border:0px; >
                            <td style= border:0px;  align= left >Password </td>
                            <td style= border:0px; ><s:password id= password  cssClass= searchInputText  /></td>
                        </tr>
                        <tr style= border:0px; >
                            <td style= border:0px;  align= left >Sub-System</td>
                            <td style= border:0px; ><s:select name= subSystem  list= { Nostro , CMS }  cssStyle= width:132px  cssClass= searchInputText /></td>
                        </tr>

                        <tr align= right  style= border:0px; >
                            <td align= right  colspan= 2  style= border:0px; >
                                <sj:submit id= loginBtn  name= Logn  href= %{urlShowMenu}  targets= menu  button= true ></sj:submit>    

                            </td>
                        </tr>
                    </table>

                    </s:form>
                </td>
                <td></td>
            </tr>
    </table>

    </div>

    <!-- IE Column Clearing -->
    <div id= ie_clearing > </div>
</div>

<script type= text/javascript >

    $(document).ready(function() {

        $( #bankName ).focus();

        $( #loginBtn ).click(function()
        {
            $( #main ).empty();
        });

    });

</script>

September 17, 2012 at 6:16 PM

Please visit the following links:

http://www.roseindia.net/struts/struts/struts2.2.1/tags/LonginValidation.html

http://www.roseindia.net/struts/struts2/struts2validation.shtml