File: Main.java
import org.hibernate.Session;
public class Main {
public static void main(String[] args) throws Exception {
HibernateUtil hibernateUtil = new HibernateUtil();
hibernateUtil
.executeSQLCommand("create table Product(id int, name varchar, description varchar, price decimal(6,2), supplierid int)");
hibernateUtil
.executeSQLCommand("create table Supplier (id int , name varchar)");
hibernateUtil
.executeSQLCommand("create table Software(id int, name varchar, description varchar, price decimal(6,2), supplierid int, version varchar)");
Session session = hibernateUtil.getSession();
Supplier superCorp = new Supplier();
superCorp.setName("Supplier1");
session.save(superCorp);
Supplier megaInc = new Supplier();
megaInc.setName("Supplier2");
session.save(megaInc);
Product mouse = new Product("Product1","first product", 20.0);
mouse.setSupplier(superCorp);
superCorp.getProducts().add(mouse);
session.flush();
Product mouse2 = new Product("Product2","second product", 22.0);
mouse2.setSupplier(superCorp);
superCorp.getProducts().add(mouse2);
Product keyboard = new Product("Product3", "third product", 30.0);
keyboard.setSupplier(megaInc);
megaInc.getProducts().add(keyboard);
Software webBrowser = new Software("Web Browser","new browser", 75.0, "2.0");
webBrowser.setSupplier(superCorp);
superCorp.getProducts().add(webBrowser);
Software email = new Software("Email","email client", 49.99, "4.1 Edition");
email.setSupplier(megaInc);
megaInc.getProducts().add(email);
session.flush();
session.close();
hibernateUtil.checkData("select * from Product");
hibernateUtil.checkData("select * from Software");
hibernateUtil.checkData("select * from Supplier");
}
}
File: Product.hbm.xml
PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
select product.price from Product product
select product.price from Product as product
File: Product.java
public class Product
{
private int id;
private Supplier supplier;
private String name;
private String description;
private double price;
public Product()
{
super();
}
public Product(String name, String description, double price)
{
super();
this.name = name;
this.description = description;
this.price = price;
}
public String getDescription()
{
return description;
}
public void setDescription(String description)
{
this.description = description;
}
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 Supplier getSupplier()
{
return supplier;
}
public void setSupplier(Supplier supplier)
{
this.supplier = supplier;
}
public double getPrice()
{
return price;
}
public void setPrice(double price)
{
this.price = price;
}
}
File: Software.hbm.xml
PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
File: Software.java
public class Software extends Product
{
private String version;
public Software()
{
super();
}
public Software(String name, String description, double price, String version)
{
super(name, description, price);
this.setVersion(version);
}
public String getVersion()
{
return version;
}
public void setVersion(String version)
{
this.version = version;
}
}
File: Supplier.hbm.xml
PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
File: Supplier.java
import java.util.ArrayList;
import java.util.List;
public class Supplier
{
private int id;
private String name;
private List products = new ArrayList();
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 List getProducts()
{
return products;
}
public void setProducts(List products)
{
this.products = products;
}
}
File: HibernateUtil.java
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.Statement;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class HibernateUtil {
Session session;
Statement st;
public HibernateUtil() throws Exception{
SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();
session = sessionFactory.openSession();
// Load the JDBC driver.
Class.forName("org.hsqldb.jdbcDriver");
System.out.println("Driver Loaded.");
// Establish the connection to the database.
String url = "jdbc:hsqldb:data/tutorial";
Connection conn = DriverManager.getConnection(url, "sa", "");
System.out.println("Got Connection.");
st = conn.createStatement();
}
public Session getSession(){
return session;
}
public void executeSQLCommand(String sql) throws Exception {
st.executeUpdate(sql);
}
public void checkData(String sql) throws Exception {
ResultSet rs = st.executeQuery(sql);
ResultSetMetaData metadata = rs.getMetaData();
for (int i = 0; i < metadata.getColumnCount(); i++) {
System.out.print("\t"+ metadata.getColumnLabel(i + 1));
}
System.out.println("\n----------------------------------");
while (rs.next()) {
for (int i = 0; i < metadata.getColumnCount(); i++) {
Object value = rs.getObject(i + 1);
if (value == null) {
System.out.print("\t ");
} else {
System.out.print("\t"+value.toString().trim());
}
}
System.out.println("");
}
}
}
File: hibernate.cfg.xml
"-//Hibernate/Hibernate Configuration DTD//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
org.hsqldb.jdbcDriver
jdbc:hsqldb:data/tutorial
sa
1
org.hibernate.dialect.HSQLDialect
org.hibernate.context.ManagedSessionContext
false
false
org.hibernate.cache.NoCacheProvider
true