userdaoimpl.java

hibernate入门代码适合初学者使用

package com.bluedot.persist;

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

import com.bluedot.commons.HibernateSessionFactory;
import com.bluedot.commons.HibernateUtil;
import com.bluedot.domain.Users;

public class UserDaoImpl implements UserDao {

	@Override
	public void deleteById(Long id) {
		Session session = HibernateSessionFactory.getSession();
		Transaction tx = session.beginTransaction();
		session.delete(this.findUserById(id));
		tx.commit();
	}

	@Override
	public void deleteUser(Users user) {
		Session session = HibernateSessionFactory.getSession();
		Transaction tx = session.beginTransaction();
		session.delete(user);
		tx.commit();
	}

	@Override
	public Users findUserById(Long id) {
		Session session = HibernateSessionFactory.getSession();
		return (Users) session.get(Users.class, id);
	}

	@Override
	public void insertUser(Users user) {
		Configuration cfg = new Configuration();
		cfg.configure();
		SessionFactory sf = cfg.buildSessionFactory();
		Session session = sf.openSession();
		Transaction tx = session.beginTransaction();
		session.save(user);
		tx.commit();
		session.close();
	}

	@Override
	public void updateUser(Users user) {
		Session session = HibernateUtil.getSession();
		Transaction tx = session.beginTransaction();
		session.update(user);
		tx.commit();
	}

}