studentdaoimpl.java

近几年来

package tarena.business;

import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;

import org.hibernate.*;
import tarena.pojo.Student;
import tarena.util.HibernateCallback;
import tarena.util.HibernateTemplate;

public class StudentDAOImpl {
	public boolean save(final Session session, final Student student) {
		return new HibernateTemplate().save(session, new HibernateCallback() {
			public Object execute(Session session) throws HibernateException {

				session.save(student);
				return null;
			};
		});
	}

	public boolean delete(final Session session, final Student student) {
		return new HibernateTemplate().delete(session, new HibernateCallback() {
			public Object execute(Session session) throws HibernateException {

				session.delete(student);
				return null;
			};
		});
	}

	public boolean update(final Session session, final Student student) {
		return new HibernateTemplate().delete(session, new HibernateCallback() {
			public Object execute(Session session) throws HibernateException {

				session.update(student);
				return null;
			};
		});
	}

	public Student find(final Session session, final Integer id) {
		return (Student) new HibernateTemplate().find(session, new HibernateCallback() {
			public Object execute(Session session) throws HibernateException {

				return session.load(Student.class, id);
			};
		});
	}

	public Student find(final Session session, final String name) {
		return (Student) new HibernateTemplate().find(session, new HibernateCallback() {
			public Object execute(Session session) throws HibernateException {

				Query query = session
						.createQuery("from Student s where s.name='" + name
								+ "'");
				// query.setString("name", name);
				query.setMaxResults(1);
				return query.uniqueResult();
			};
		});
	}

	public Map find(final Session session) {
		return (Map) new HibernateTemplate().find(session, new HibernateCallback() {
			public Object execute(Session session) throws HibernateException {

				Map results = new TreeMap();
				List list = session.createQuery("from Student").list();
				for (Iterator it = list.iterator(); it.hasNext();) {
					Student student = (Student) it.next();
					results.put(student.getId(), student);
				}
				return results;
			};
		});
	}
}