userdao.java

模仿当当网基于struts+hierbernate与mysql的商务网站。

package org.whatisjava.dang.dao;

import org.hibernate.FlushMode;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.whatisjava.dang.domain.User;

public class UserDao {

	public void addUser(User user) {
		Session session=HbSessionFactory.getSession();
		Transaction tst=session.beginTransaction();
		session.save(user);
		tst.commit();
		session.close();
	}


	public User getByEmail(String email) {
		Session session=HbSessionFactory.getSession();
		session.setFlushMode(FlushMode.NEVER);
		Query query=session.createQuery("from User u where u.email=?");
		query.setString(0, email);
		User user=(User)query.uniqueResult();
		session.close();
		return user;
	}


	public User getByNickname(String nickname) {
		Session session=HbSessionFactory.getSession();
		session.setFlushMode(FlushMode.NEVER);
		Query query=session.createQuery("from User u where u.nickname=?");
		query.setString(0, nickname);
		User user=(User)query.uniqueResult();
		session.close();
		return user;
	}



	public void update(User user) {
		Session session=HbSessionFactory.getSession();
		Transaction tst=session.beginTransaction();
		session.update(user);
		tst.commit();
		session.close();
	}


	public User getById(int id) {
		Session session=HbSessionFactory.getSession();
		session.setFlushMode(FlushMode.NEVER);
		User user=(User)session.get(User.class, id);
		session.close();
		return user;
	}

}