private static void listClient() {
    Transaction tx = null;
   
    //Session session = SessionFactoryUtil.getInstance().getCurrentSession();
   
    SessionFactory fact = new Configuration().configure().buildSessionFactory();
       Session   session = fact.openSession();

   
   
    try {
      tx = session.beginTransaction();
      Query query=session.createQuery("select h from com.Category h");

      List<Client_Master> clientList = session.createQuery("select h from "+Client_Master.class.getName()+" h").list();
      System.out.println("???????? "+clientList.size());
      for (Iterator iter = clientList.iterator(); iter.hasNext();) {
        Client_Master element = (Client_Master) iter.next();
//        logger.debug("{}", element);
        System.out.println(">>>>>>>> "+element.getGeography());
      }
      tx.commit();
    } catch (RuntimeException e) {
      if (tx != null && tx.isActive()) {
        try {
// Second try catch as the rollback could fail as well
          tx.rollback();
        } catch (Exception e1) {
          logger.debug("Error rolling back transaction");
        }
// throw again the first exception
        throw e;
      }


    }
  }

package com;
import java.io.Serializable;


import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name="CLIENT_MASTER")
public class Client_Master implements Serializable {

@Id
@Column(name="product_id")
@GeneratedValue(strategy=GenerationType.AUTO)
private Long product_id;

@Column(name="sub_category_id")
private Long sub_category_id;

@Column(name="product_name")
private String product_name;

@Column(name="product_website")
private String product_website;

@Column(name="product_company")
private String product_company;

@Column(name="geography")
private String geography;

@Column(name="timestamp")
private String timestamp;

@Column(name="cumulative_rating")
private Long cumulative_rating;

public Long getProduct_id() {
   return product_id;
}
public void setProduct_id(Long product_id) {
   this.product_id = product_id;
}
public Long getSub_category_id() {
   return sub_category_id;
}
public void setSub_category_id(Long sub_category_id) {
   this.sub_category_id = sub_category_id;
}
public String getProduct_name() {
   return product_name;
}
public void setProduct_name(String product_name) {
   this.product_name = product_name;
}
public String getProduct_website() {
   return product_website;
}
public void setProduct_website(String product_website) {
   this.product_website = product_website;
}
public String getProduct_company() {
   return product_company;
}
public void setProduct_company(String product_company) {
   this.product_company = product_company;
}
public String getGeography() {
   return geography;
}
public void setGeography(String geography) {
   this.geography = geography;
}
public String getTimestamp() {
   return timestamp;
}
public void setTimestamp(String timestamp) {
   this.timestamp = timestamp;
}
public Long getCumulative_rating() {
   return cumulative_rating;
}
public void setCumulative_rating(Long cumulative_rating) {
   this.cumulative_rating = cumulative_rating;
}
}

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
   <persistence-unit name="HibernateMapping">
   <class>com.Client_Master</class>
   <class>com.Category</class>
   <!-- <class>com.Search_Tolerence</class>
   <class>com.Web_Source_Master</class>
   <class>com.Web_Source_Result</class>  -->
   <properties>
   <property name="hibernate.ejb.cfgfile" value="/hibernate.cfg.xml" />
   </properties>
   </persistence-unit>
</persistence>

<?xml version='1.0' encoding='UTF-8'?>
<!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="connection.datasource">HibernateMapping</property>
      -->
      <property name="connection.url">
         jdbc:postgresql://localhost/mediaAnalytics
      </property>
      <property name="connection.username">postgres</property>
      <property name="connection.driver_class">
         org.postgresql.Driver
      </property>
      <property name="dialect">
         org.hibernate.dialect.PostgreSQLDialect
      </property>
      <property name="connection.password">admin@123</property>
      <property name="transaction.factory_class">
         org.hibernate.transaction.JDBCTransactionFactory
      </property><!--  thread is the short name for      org.hibernate.context.ThreadLocalSessionContext      and let Hibernate bind the session automatically to the thread    -->
      <property name="current_session_context_class">thread</property>
      <!-- this will show us all sql statements -->
      <property name="hibernate.show_sql">true</property>

      <!--
         <mapping class="com.Client_Master" />
      -->


      <!-- mapping files
         <mapping resource="de/laliluna/example/Honey.hbm.xml" />
      -->

   </session-factory>
</hibernate-configuration>