I am developing a Struts 2-Spring 3-Hibernate 4 integrated web application.Whenever I run the application on web server it is always giving Null Pointer exception because of Session Factory being null.
Please suggest me some solution as I am stuck in this problem for a long time.
I have placed spring configuration file,Dao Implementation class and web.xml as follows:

spring-config.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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location">
<value>/WEB-INF/databaseConfig.properties</value>
</property>
</bean>
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${db.driverClassName}" />
<property name="url" value="${db.databaseurl}" />
<property name="username" value="${db.username}" />
<property name="password" value="${db.password}" />
</bean>

<bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">

<property name="packagesToScan" value="in.nic.eservicebook.pojo" />
<property name="dataSource" ref="dataSource" />
<property name="annotatedClasses">
<list>
<value>in.nic.eservicebook.pojo.Title</value>
<value>in.nic.eservicebook.pojo.BloodGroup</value>
<value>in.nic.eservicebook.pojo.Community</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${hibernate.dialect}</prop>
<prop key="hibernate.show_sql">${hibernate.show_sql}</prop>

</props>
</property>
</bean>


<bean id="MasterDao" class="in.nic.eservicebook.dao.MasterDaoImpl">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>

</beans>

MasterDaoImpl.java

package in.nic.eservicebook.dao;

import in.nic.eservicebook.pojo.BloodGroup;
import in.nic.eservicebook.pojo.Community;
import in.nic.eservicebook.pojo.Title;
import in.nic.util.HibernateUtil;
import java.util.List;
import org.hibernate.HibernateException;
import org.hibernate.SessionFactory;

import org.hibernate.Session;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;

public class MasterDaoImpl implements MasterDao {

SessionFactory sessionFactory;


public SessionFactory getSessionFactory() {
return sessionFactory;
}


public void setSessionFactory(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}


@SuppressWarnings("unchecked")
public List<Title> listTitle() {
List<Title> titleList = null;
Session session=null;

try {
session = getSessionFactory().getCurrentSession();
session.beginTransaction();


titleList=(List<Title>)session.createQuery("from Title").list();
session.getTransaction().commit();
}
catch (Exception e) {
e.printStackTrace();
session.getTransaction().rollback();

}

finally
{
session.close();
}
return titleList;
}


@SuppressWarnings("unchecked")
public List<BloodGroup> listBloodGroup() {
List<BloodGroup> bloodGroupList = null;
Session session = getSessionFactory().openSession();
session.beginTransaction();
try {


bloodGroupList=(List<BloodGroup>)session.createQuery("from BloodGroup").list();
session.getTransaction().commit();

}
catch (Exception e) {
e.printStackTrace();
session.getTransaction().rollback();

}

finally
{
session.close();
}
return bloodGroupList;
}

@SuppressWarnings("unchecked")
public List<Community> listCommunity() {
List<Community> communityList = null;
Session session = getSessionFactory().openSession();
session.beginTransaction();
try {


communityList=(List<Community>)session.createQuery("from Community").list();
session.getTransaction().commit();
}
catch (Exception e) {
e.printStackTrace();
session.getTransaction().rollback();

}
finally
{
session.close();
}
return communityList;
}

}

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>esb</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring-config.xml
</param-value>
</context-param>
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.FilterDispatcher </filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<welcome-file-list>
<welcome-file>eservicebook/index.jsp</welcome-file>
</welcome-file-list>
</web-app>