Binding problem in JSP with Spring

[Someswar Panda]

I am very new with Spring. I am trying to develop a simple login application where if login succeeds user is forwarded to a success page and if not then to the same login.jsp.
I am using 2 controllers, first one is named LoginFormController, which is derived from SimpleFormController and is used for validation purpose. 2nd one is named ResultPageController, derived from AbstractController, which is used for login logic like database fetching.
Everything is working fine except when I am tring to view the error validation messages in the login.jsp. There is some problem with the spring tag. it says it can not find the "loginData" attribute.

Employee.java

   
package model;

public class Employee
{
	private int employeeId;
	private String password;
	
	public int getEmployeeId() {
		return employeeId;
	}

	public String getPassword() {
		return password;
	}

	
	public void setEmployeeId(int employeeId) {
		this.employeeId = employeeId;
	}

	
	public void setPassword(String password) {
		this.password = password;
	}
};  

web.xml

 <?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
	<display-name>Terms</display-name>
	  
	<listener>
  		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	
	<context-param>
  		<param-name>contextConfigLocation</param-name>
  		<param-value>/WEB-INF/Terms-servlet.xml</param-value>
	</context-param>
	
	
	<servlet>
    	<servlet-name>Terms</servlet-name>
    	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    	<load-on-startup>1</load-on-startup>
  	</servlet>

  	<servlet-mapping>
    	<servlet-name>Terms</servlet-name>
    	<url-pattern>*.htm</url-pattern>
  	</servlet-mapping>
  	
  	<welcome-file-list>
		<welcome-file>login.jsp</welcome-file>
	</welcome-file-list>
	
	<jsp-config>
		<taglib>
			<taglib-uri>/spring</taglib-uri>
			<taglib-location>/WEB-INF/spring.tld</taglib-location>
		</taglib>
	</jsp-config>	
	
</web-app>   

Terms-servlet.xml

 <?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:jee="http://www.springframework.org/schema/jee"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
                        http://www.springframework.org/schema/beans/spring-beans.xsd
                        http://www.springframework.org/schema/context 
                        http://www.springframework.org/schema/context/spring-context.xsd
                        http://www.springframework.org/schema/jee 
                        http://www.springframework.org/schema/jee/spring-jee-2.5.xsd">
	 
  
  <bean id="urlMap" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
		<property name="urlMap">
			<map>
     		 <entry key="Hello.htm"><ref bean="loginFormController"/></entry>
    		 <entry key="ResultPage.htm"><ref bean="resultPageController"/></entry>
  			</map>
		</property>
	</bean>
	
		
	<!-- Controller -->
	<bean id="loginFormController" class="controller.LoginFormController">
	    <property name="loginFormValidator"><ref bean="loginFormValidator"/></property>
	    <property name="formView" value="login.jsp"/>
	    <property name="successView" value="ResultPage.htm"/>
	    <property name="commandName" value="loginData"/>
	    <property name="commandClass" value="model.Employee"/>
	</bean>
  	
  	<!-- controller of the result page -->
	<bean id="resultPageController" class="controller.ResultPageController">
		<property name="employeeDAO"> <ref bean="employeeDAO"/></property>
	</bean>
  	
  	
  	<bean id="loginFormValidator" class="controller.LoginFormValidator"/>
  	
  	<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
  		<property name="viewClass"><value>org.springframework.web.servlet.view.JstlView</value></property>
 		<property name="prefix"><value></value></property>
  		<property name="suffix"><value></value></property>
	</bean>
  	
  	
  	<!-- DAO class -->
	<bean id="employeeDAO" class="model.EmployeeDAO">
    	<property name="sessionFactory" ref="termsSessionFactory"/>
  	</bean>
  	
  	<bean id="termsDataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    	<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver"/>
    	<property name="url" value="jdbc:oracle:thin:@10.203.121.192:1521:ds011"/>
    	<property name="username" value="schandran"/>
    	<property name="password" value="schandran"/>
  	</bean>
  	
  	<bean id="termsSessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean" >
    	<property name="dataSource" ref="termsDataSource"/>
    	<property name="useTransactionAwareDataSource" value="true" />
    	<property name="mappingResources">
        	<list>
            	<value>employee.hbm.xml</value>
        	</list>
    	</property>
    	
    	<property name="hibernateProperties">  		
        	<props>
              <prop key="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</prop>
              <prop key="hibernate.show_sql">true</prop>
              <prop key="hibernate.c3p0.minPoolSize">5</prop>
              <prop key="hibernate.c3p0.maxPoolSize">200</prop>
              <prop key="hibernate.c3p0.timeout">1800</prop>
              <prop key="hibernate.c3p0.max_statement">50</prop>
              <prop key="hibernate.generate_statistics">true</prop>
              <!--<prop key="hibernate.cache.use_query_cache">true</prop>-->
          	</props>        	
    	</property>
	</bean>
	
	<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
		<property name="sessionFactory" ref="termsSessionFactory" />
	</bean>
   	
</beans>   

LoginFormController.java

   package controller;

import model.Employee;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.validation.BindException;
import org.springframework.web.servlet.mvc.SimpleFormController;
import org.springframework.web.servlet.view.RedirectView;
import org.springframework.web.servlet.ModelAndView;

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

import java.io.IOException;

@SuppressWarnings("deprecation")
public class LoginFormController extends SimpleFormController{

	protected final Log logger = LogFactory.getLog(getClass());
	
	private LoginFormValidator loginFormValidator;
		
		
	public void setLoginFormValidator(LoginFormValidator loginFormValidator){
		this.loginFormValidator = loginFormValidator;
		logger.info("validator::");
	}
	
	public LoginFormValidator getLoginFormValidator(){
		return this.loginFormValidator;
	}
	
		
	public ModelAndView onSubmit(HttpServletRequest request, HttpServletResponse response, Object command, BindException errors) throws Exception {
	    Employee loginData = (Employee)command;
	    request.getSession().setAttribute("loginData",loginData);
	    logger.info("user name::"+loginData.getEmployeeId()+"password::"+loginData.getPassword());
	    logger.info("onsubmit::");
	    ModelAndView modelAndView = new ModelAndView(new RedirectView(getSuccessView()));
	    logger.info("model&view::"+modelAndView);
	    return modelAndView;
    }
	
}
 

LoginFormValidator.java

  
package controller;
import model.Employee;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;


public class LoginFormValidator implements Validator{

	protected final Log logger = LogFactory.getLog(getClass());
	public boolean supports(Class clazz) {
		return clazz.equals(Employee.class);

    }
	 
	 public void validate(Object obj, Errors errors) {
	 	Employee loginData = (Employee) obj;
	 	
	 	ValidationUtils.rejectIfEmptyOrWhitespace(errors, "employeeId", "field.required", "Required field");
	 	logger.info("inside validator::");
		ValidationUtils.rejectIfEmptyOrWhitespace(errors, "password", "field.required", "Required field");
		
		
      }
    }
  

ResultPageController.java

 package controller;

import model.Employee;
import model.EmployeeDAO;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.web.servlet.mvc.AbstractController;
import org.springframework.web.servlet.mvc.Controller;
import org.springframework.web.servlet.ModelAndView;

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

import java.io.IOException;

public class ResultPageController extends AbstractController {

	protected final Log logger = LogFactory.getLog(getClass());
	private boolean login = false;
	private EmployeeDAO employeeDAO;
		
	public void setEmployeeDAO(EmployeeDAO employeeDAO) {
		this.employeeDAO = employeeDAO;
		logger.info("setter injection "+this.employeeDAO);// Object instantiated here
	}
	
	public EmployeeDAO getEmployeeDAO() {
		return this.employeeDAO;
	}   

	
	@Override
	protected ModelAndView handleRequestInternal(HttpServletRequest request,
			HttpServletResponse response) throws Exception {
		logger.info("Result Con::");
		
    	Employee loginData = (Employee)request.getSession().getAttribute("loginData");
    		
    	int userName = loginData.getEmployeeId();
		String passWord = loginData.getPassword();
		
		// login = employeeDAO.loginEmployee(124907,"1249075");
		login = employeeDAO.loginEmployee(userName,passWord);
		
		if(login == true)
		{
			return new ModelAndView("pages/success.html");
		}
		else
		{
			String fail = "Invalid Username/Password.";
			return new ModelAndView("login.jsp","fail",fail);
		}
	}

}   

login.jsp

   <%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<%@ page session="true"%>
<%@ taglib uri="http://java.sun.com/jstl/fmt" prefix="fmt" %>
<%@ taglib uri="http://java.sun.com/jstl/core_rt" prefix="c" %>
<%@taglib uri="http://www.springframework.org/tags" prefix="spring" %>
<%@taglib uri="http://www.springframework.org/tags/form" prefix="form" %>


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
            "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
 <link rel="stylesheet" type="text/css" href="pages/termStyle.css"/>
  <style type="text/css">
  form{
  width:650px;
  height:75px;
  }
  </style>
 <title>Login Page</title>
</head>

<body>
  <h1>Login</h1>
  <h3 class="fail"><c:out value="${fail}"/></h3>
  
  <form:form commandName="loginData" method="post" action="Hello.htm">
   <span class="labels">Employee ID:</span> 
   
   <form:input cssClass="inputs" path="employeeId"/><form:errors path="employeeId"></form:errors>
   
   <span class="labels">Password :</span>
   
   <form:password cssClass="inputs" cssStyle="float:left;margin-left:37px;" path="password"/><form:errors path="password"></form:errors>
   
   <a class="links" href="pages/changePassw.jsp">Change Password?</a>
   <div class="buttons">
    <input class="submits" type="submit" value="Login"/>
    <input class="submits" type="reset" value="Reset"/>
   </div>
  </form:form>
</body>
</html>
 

The error showing >>

  
15:04:03,937 INFO  [SimpleUrlHandlerMapping] Mapped URL path [/ResultPage.htm] onto handler [controller.ResultPageController@1bfc9d]
15:04:03,937 INFO  [HibernateTransactionManager] Using DataSource [org.springframework.jdbc.datasource.DriverManagerDataSource@165d9bd] of Hibernate SessionFactory for HibernateTransactionManager
15:04:04,078 INFO  [DispatcherServlet] FrameworkServlet 'Terms': initialization completed in 266 ms
15:04:41,062 ERROR [InputTag] [b]Neither BindingResult nor plain target object for bean name 'loginData' available as request attribute[/b]
java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'loginData' available as request attribute
	at org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:141)
	at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getBindStatus(AbstractDataBoundFormElementTag.java:175)
	at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getPropertyPath(AbstractDataBoundFormElementTag.java:195)
	
  

Please help !!