Hibernate编写通用数据库操作代码

insert方法
public void insert(Object o){
Session session = HibernateSessionFactory.currentSession();
Transaction t = session.beginTransaction();
session.save(o);
t.commit();
HibernateSessionFactory.clossSession();
}

delete方法
public void delete(Object o,Serializable id){
Session session = HibernateSessionFactory.currentSession():
Transaction t = session.beginTransaction();
Object o = session.get(o.class,id);
if(o!=null){
session.delete(o);
}
t.commit();
HibernateSessionFactory.clossSession();
}

update方法
public void update(Object o,Serializable id){
Session session = HibernateSessionFactory.currentSession();
Transaction t = session.beginTransaction();
session.update(o,id);
t.commit();
HibernateSessionFactory.clossSession();
}

基于HQL的通用select方法
public ArrayList select(String sql){
Session session = HibernateSessionFactory.currentSession();
Query query = createQuery(sql);
List list = query.list();
HibernateSessionFactory.clossSession();
return (ArrayList)list;
}

基于SQL的通用select方法
public ArrayList select(String sql) throws Exception{
Session session = HibernateSessionFactory.currentSession();
Connection con = session.connection();
PreparedStatement pstmt = con.preparedStatement(sql);
ResultSet rs = pstmt.executeQuery();
ResultSetMetaData rsmd = rs.getMetaData();
Hashtable ht = null;
ArrayList array = new ArrayList();
while(rs.next()){
ht = new Hashtable();
for(int i=0;i<rsmd.getColumnCount();i++){
ht.put(rsmd.getColumnName(i+1),rs.getObject(i+1));
}
array.add(ht);
}
HibernateSessionFactory.clossSession();
return array;