<?xml version="1.0"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
  <session-factory>
    <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
    <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
    <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/xyz</property>
    <property name="hibernate.connection.username">root</property>
    <property name="hibernate.connection.password">password</property>
   
<!--    <property name="hibernate.c3p0.max_size">20</property>
    <property name="hibernate.c3p0.max_statements">50</property>
    <property name="hibernate.c3p0.min_size">3</property>
    <property name="hibernate.c3p0.timeout">3000</property>
    <property name="hibernate.c3p0.idle_test_period">3000</property>
    <property name="connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>    -->
   
    <mapping resource="com\illustrations\hibernate\hbm\Tbillusrevisions.hbm.xml"/>
    <mapping resource="com\illustrations\hibernate\hbm\Tbuser.hbm.xml"/>
    <mapping resource="com\illustrations\hibernate\hbm\Tbcmm.hbm.xml"/>
    <mapping resource="com\illustrations\hibernate\hbm\Tbuserrole.hbm.xml"/>
    <mapping resource="com\illustrations\hibernate\hbm\Tbprogram.hbm.xml"/>
    <mapping resource="com\illustrations\hibernate\hbm\Tbcmmrevisions.hbm.xml"/>
    <mapping resource="com\illustrations\hibernate\hbm\Tbrole.hbm.xml"/>
    <mapping resource="com\illustrations\hibernate\hbm\Tbillustrations.hbm.xml"/>
    <mapping resource="com\illustrations\hibernate\hbm\Tblmenu.hbm.xml"/>
  </session-factory>
</hibernate-configuration>

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!--
    Mapping file autogenerated by MyEclipse Persistence Tools
-->
<hibernate-mapping>
    <class name="com.illustrations.hibernate.pojo.Tbillusrevisions" table="tbillusrevisions" catalog="mbdillustrations">
        <id name="illusRevPk" type="java.lang.Integer">
            <column name="illus_rev_pk" />
            <generator class="increment"></generator>
        </id>
        <many-to-one name="tbillustrations" class="com.illustrations.hibernate.pojo.Tbillustrations" fetch="select">
            <column name="illus_id_fk" />
        </many-to-one>
        <many-to-one name="tbcmmrevisions" class="com.illustrations.hibernate.pojo.Tbcmmrevisions" fetch="select">
            <column name="cmm_rev_fk" />
        </many-to-one>
        <property name="illusRevNum" type="java.lang.Integer">
            <column name="illus_rev_num" />
        </property>
        <property name="illusRevAuthor" type="java.lang.String">
            <column name="illus_rev_author" length="45" />
        </property>
        <property name="illusRevIllustrator" type="java.lang.String">
            <column name="illus_rev_illustrator" length="45" />
        </property>
        <property name="illusRevDate" type="java.util.Date">
            <column name="illus_rev_date" length="10" />
        </property>
        <property name="illusRevComments" type="java.lang.String">
            <column name="illus_rev_comments" length="45" />
        </property>
        <property name="illusRevStatus" type="java.lang.String">
            <column name="illus_rev_status" length="45" not-null="true" />
        </property>
    </class>
</hibernate-mapping>

public class HibernateSessionFactory {

    /**
     * Location of hibernate.cfg.xml file. Location should be on the classpath
     * as Hibernate uses #resourceAsStream style lookup for its configuration
     * file. The default classpath location of the hibernate config file is in
     * the default package. Use #setConfigFile() to update the location of the
     * configuration file for the current session.
     */
    private static String CONFIG_FILE_LOCATION = "com/illustrations/hibernate/hibernate.cfg.xml";
    private static final ThreadLocal<Session> threadLocal = new ThreadLocal<>();
    private static Configuration configuration = new Configuration();
//    private static Class hiberClass = HibernateSessionFactory.class;
//    public static final String KEY_NAME = hiberClass.getName();
    private static org.hibernate.SessionFactory sessionFactory;
    private static String configFile = CONFIG_FILE_LOCATION;

//    static {
//        try {
//            configuration.configure(configFile);
//            sessionFactory = configuration.buildSessionFactory();
//        } catch (Exception e) {
//            System.err.println("%%%% Error Creating SessionFactory %%%%");
//        }
//    }
    private HibernateSessionFactory() {
    }

    /**
     * Returns the ThreadLocal Session instance. Lazy initialize the
     * <code>SessionFactory</code> if needed.
     *
     * @return Session
     * @throws HibernateException
     */
    public static Session getSession() throws HibernateException {
        Session session = (Session) threadLocal.get();
        if (session == null || !session.isConnected()) {
            if (sessionFactory == null) {
                try {
                    configuration.configure(CONFIG_FILE_LOCATION);
                    sessionFactory = configuration.buildSessionFactory();
                } catch (Exception e) {
                    System.err.println("%%%% Error Creating SessionFactory %%%%");
                    e.printStackTrace();
                }
            }
            session = sessionFactory.openSession();
            threadLocal.set(session);
        }
        return session;
    }

    /**
     * Rebuild hibernate session factory
     *
     */
    public static void rebuildSessionFactory() {
        try {
            Configuration configure = configuration.configure(configFile);
            sessionFactory = configuration.buildSessionFactory();
        } catch (Exception e) {
            System.err
                    .println("%%%% Error Creating SessionFactory %%%%");
            e.printStackTrace();
        }
    }

    /**
     * Close the single hibernate session instance.
     *
     * @throws HibernateException
     */
    public static void closeSession() throws HibernateException {
        Session session = (Session) threadLocal.get();
        threadLocal.set(null);

        if (session != null) {
            session.close();
        }
    }

    /**
     * return session factory
     *
     */
    public static org.hibernate.SessionFactory getSessionFactory() {
        return sessionFactory;
    }

    /**
     * return session factory
     *
     * session factory will be rebuilded in the next call
     */
    public static void setConfigFile(String configFile) {
        HibernateSessionFactory.configFile = configFile;
        sessionFactory = null;
    }
}

Struts Problem Report
Struts has detected an unhandled exception:

Messages: 
File: com/illustrations/hibernate/dao/HibernateSessionFactory.java
Line number: 59


--------------------------------------------------------------------------------

Stacktraces
java.lang.NullPointerException
    com.illustrations.hibernate.dao.HibernateSessionFactory.getSession(HibernateSessionFactory.java:59)
    com.illustrations.hibernate.dao.BaseHibernateDAO.getSession(BaseHibernateDAO.java:13)
    com.illustrations.hibernate.dao.TbuserDAO.findUser(TbuserDAO.java:187)
    com.illustrations.actions.login.LoginAction.execute(LoginAction.java:51)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

[b]And in the Console:[/b]
%%%% Error Creating SessionFactory %%%%
org.hibernate.InvalidMappingException: Could not parse mapping document from resource com\illustrations\hibernate\hbm\Tbillusrevisions.hbm.xml
   at org.hibernate.cfg.Configuration.addResource(Configuration.java:569)
   at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1587)
   at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1555)
   at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1534)
   at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1508)
   at org.hibernate.cfg.Configuration.configure(Configuration.java:1428)
   at com.illustrations.hibernate.dao.HibernateSessionFactory.getSession(HibernateSessionFactory.java:52)
   at com.illustrations.hibernate.dao.BaseHibernateDAO.getSession(BaseHibernateDAO.java:13)
   at com.illustrations.hibernate.dao.TbuserDAO.findUser(TbuserDAO.java:187)
   at com.illustrations.actions.login.LoginAction.execute(LoginAction.java:51)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:601)
   at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:450)
   at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:289)
   at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:252)
   at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:256)
   at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
   at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:167)
   at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
   at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
   at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:265)
   at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)
   at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
   at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
   at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138)
   at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
   at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:239)
   at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
   at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
   at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:239)
   at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
   at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
   at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:191)
   at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
   at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:73)
   at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
   at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:91)
   at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
   at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:252)
   at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
   at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)
   at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
   at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)
   at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
   at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145)
   at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
   at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171)
   at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
   at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
   at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:161)
   at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
   at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
   at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
   at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:193)
   at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
   at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:189)
   at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
   at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)
   at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:563)
   at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
   at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
   at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
   at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
   at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:999)
   at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:565)
   at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
   at java.lang.Thread.run(Thread.java:722)
Caused by: org.hibernate.DuplicateMappingException: Duplicate class/entity mapping com.illustrations.hibernate.pojo.Tbillusrevisions
   at org.hibernate.cfg.Mappings.addClass(Mappings.java:118)
   at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:145)
   at org.hibernate.cfg.Configuration.add(Configuration.java:669)
   at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:504)
   at org.hibernate.cfg.Configuration.addResource(Configuration.java:566)
   ... 78 more