businessservice.java

hibernate的经典练习

package com.ghy.test6;

import java.util.Iterator;
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;

public class BusinessService {

	/**
	 * 组成关系
	 */

	public static SessionFactory sessionFactory;
	static {
		try {

			Configuration cfg = new Configuration();
			cfg.addClass(Customers.class);
			sessionFactory = cfg.buildSessionFactory();
		} catch (Exception e) {
			// TODO: handle exception
		}

	}

	public void saveCustomers() {
		Session session = sessionFactory.openSession();
		Transaction ts = null;
		try {
			ts = session.beginTransaction();
			HomeAddress home = new HomeAddress("吉林", "长春", "经纬路", "130000",
					new Customers());
			ComAddress com = new ComAddress("辽宁", "沈阳", "五爱街", "100000",
					new Customers());
			Customers customers = new Customers("高洪宇", home, com);
			home.setCustomers(customers);
			com.setCustomers(customers);
			session.save(customers);

			ts.commit();

		} catch (Exception e) {
			// TODO: handle exception
			if (ts != null)
				ts.rollback();
			e.printStackTrace();
		} finally {
			session.close();
		}

	}

	public void searchCustomers() {
		Session session = sessionFactory.openSession();
		Transaction ts = null;
		try {
			ts = session.beginTransaction();
			Query query = session
					.createQuery("from Customers c where c.homeAddress.city = :city");
			query.setString("city", "长春");
			List list = query.list();
			for (Iterator iterator = list.iterator(); iterator.hasNext();) {
				Customers object = (Customers) iterator.next();
				System.out.println(object.getId());
				System.out.println(object.getComAddress().getCode());

			}

			ts.commit();

		} catch (Exception e) {
			// TODO: handle exception
			if (ts != null)
				ts.rollback();
			e.printStackTrace();
		} finally {
			session.close();
		}
	}

	public void test() {
//		saveCustomers();

		 searchCustomers();
	}

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		BusinessService bs = new BusinessService();
		bs.test();

	}

}