hibernate annotations

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

	<session-factory>

		<!-- Database connection settings -->
		<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
		<property name="connection.url">jdbc:mysql://localhost:3306/bookshop</property>
		<property name="connection.username">root</property>
		<property name="connection.password">123456</property>

		<!-- JDBC connection pool (use the built-in) -->
		<property name="connection.pool_size">1</property>

		<!-- SQL dialect -->
		<property name="dialect">org.hibernate.dialect.HSQLDialect</property>

		<!-- Enable Hibernate's automatic session context management -->
		<property name="current_session_context_class">thread</property>

		<!-- Disable the second-level cache -->
		<property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>

		<!-- Echo all executed SQL to stdout -->
		<property name="show_sql">true</property>

		<!-- Drop and re-create the database schema on startup -->
		<property name="hbm2ddl.auto">update</property>

		<mapping class="com.demo.hibernate.model.T_Book" />

	</session-factory>

</hibernate-configuration>

package com.demo.hibernate.model;

import javax.persistence.Entity;
import javax.persistence.Id;

@Entity
public class T_Book {

	private int id;
	private String name;
	private String author;
	private String press;
	private double price;
	
	@Id
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getAuthor() {
		return author;
	}
	public void setAuthor(String author) {
		this.author = author;
	}
	public String getPress() {
		return press;
	}
	public void setPress(String press) {
		this.press = press;
	}
	public double getPrice() {
		return price;
	}
	public void setPrice(float price) {
		this.price = price;
	}
}

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

import com.demo.hibernate.model.T_Book;



public class Application {

	public static void main(String[] args) {
		
		T_Book b=new T_Book();
		b.setId(100002);
		b.setName("book1");
		b.setAuthor("author1");
		b.setPress("press1");
		b.setPrice(23);
		
		Configuration cfg=new Configuration();
		SessionFactory factory=cfg.configure().buildSessionFactory();
		Session session=factory.openSession();
		
		session.beginTransaction();
		session.save(b);
		session.getTransaction().commit();
		
		session.close();
		factory.close();
	}
}