HQL inner join

package com.bjsxt.hibernate;

import java.util.HashSet;
import java.util.Set;

public class Customer {

	private int id;
	private String name;
	private Set<Order> orders = new HashSet<Order>();
	
	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 Set<Order> getOrders() {
		return orders;
	}
	public void setOrders(Set<Order> orders) {
		this.orders = orders;
	}	
	
}

package com.bjsxt.hibernate;

public class Order {

	private int id;
	private String number;
	private Customer customer;
	
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getNumber() {
		return number;
	}
	public void setNumber(String number) {
		this.number = number;
	}
	public Customer getCustomer() {
		return customer;
	}
	public void setCustomer(Customer customer) {
		this.customer = customer;
	}	
	
}

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
	<class name="com.bjsxt.hibernate.Customer" table="t_customers">
		<id name="id">
			<generator class="native"></generator>
		</id>
		
		<property name="name"></property>
		<set name="orders">
			<key column="customerId"></key>
			<one-to-many class="com.bjsxt.hibernate.Order"/>
		</set>
    </class>
	
</hibernate-mapping>

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
	<class name="com.bjsxt.hibernate.Order" table="t_orders">
		<id name="id">
			<generator class="native"></generator>
		</id>
		
		<property name="number"></property>
		<many-to-one name="customer" column="customerId" class="com.bjsxt.hibernate.Customer" cascade="save-update" />
    </class>
</hibernate-mapping>

package com.bjsxt.test;

import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.tool.hbm2ddl.SchemaExport;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;

import com.bjsxt.hibernate.Customer;
import com.bjsxt.hibernate.Order;

public class HibernateORMappingTest {
	private static SessionFactory sessionFactory;
	
	@BeforeClass
	public static void beforeClass() {
			sessionFactory = new Configuration().configure().buildSessionFactory();
	}
	@AfterClass
	public static void afterClass() {
		sessionFactory.close();
	}
	
	@Test
	public void testSave() {
		Session session = sessionFactory.openSession();
		Transaction tx = session.beginTransaction();
		Customer customer = new Customer();
		customer.setName("rose");
		Order order = new Order();
		order.setNumber("2011012401");
		order.setCustomer(customer);
		session.save(order);
		tx.commit();
		session.close();
	}
	
	@Test
	public void testQuery() {
		Session session = sessionFactory.openSession();
		String hql = "from Customer c inner join c.orders as o where c.id=1";
		Query query = session.createQuery(hql);
		List<Object[]> result = query.list();
		for(Object[] obj : result) {
			Customer customer = (Customer)obj[0];
			Order order = (Order)obj[1];
			System.out.print(customer.getId() + "  " + customer.getName() + "  "
					+ order.getNumber());
			System.out.println();
		}
	}
	
	@Test
	public void testQuery2() {
		Session session = sessionFactory.openSession();
		String hql = "select c.id,c.name,o.number from Customer c inner join c.orders as o";
		Query query = session.createQuery(hql);
		List<Object[]> result = query.list();
		for(Object[] row : result) {
			for(int i = 0; i < row.length; i++) {
				System.out.print(row[i] + "  ");
			}
			System.out.println();
		}
	}
	
	@Test
	public void testSchemaExport() {
		new SchemaExport(new Configuration().configure()).create(false, true);
	}
	
	public static void main(String[] args) {
		beforeClass();
	}
}