teacherdaoimpl.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.Teacher;
import tarena.util.HibernateCallback;
import tarena.util.HibernateTemplate;

public class TeacherDAOImpl {
	public boolean save(final Session session, final Teacher teacher) {
		return new HibernateTemplate().save(session, new HibernateCallback() {
			public Object execute(Session session) throws HibernateException {
				
				session.save(teacher);
				return null;
			};
		});
	}
	
	public boolean delete(final Session session, final Teacher teacher) {
		return new HibernateTemplate().delete(session, new HibernateCallback() {
			public Object execute(Session session) throws HibernateException {
				
				session.delete(teacher);
				return null;
			};
		});		
	}
	
	public boolean update(final Session session, final Teacher teacher) {
		return new HibernateTemplate().update(session, new HibernateCallback() {
			public Object execute(Session session) throws HibernateException {
				
				session.update(teacher);
				return null;
			};
		});		
	}	

	public Teacher find(final Session session, final Integer id) {
		return (Teacher)new HibernateTemplate().find(session, new HibernateCallback() {
			public Object execute(Session session) throws HibernateException {
				
				return session.load(Teacher.class, id);
			};
		});		
	}

	public Teacher find(final Session session, final String name) {
		return (Teacher)new HibernateTemplate().find(session, new HibernateCallback() {
			public Object execute(Session session) throws HibernateException {
				
				Query query = session.createQuery("from Teacher t where t.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 Teacher").list();
				for(Iterator it=list.iterator();it.hasNext();) {
					Teacher teacher = (Teacher)it.next();
					results.put(teacher.getId(), teacher);
				}			
				return results;
			};
		});		
	}
}