hibernate 课件 hibernate 课件

package com.hygj.dao; import org.hibernate.Session; import org.hibernate.Transaction; import com.hygj.util.DbConn; public class BaseDAO { public void save(Object obj){ Session session = DbConn.getSession(); Transaction tran = session.beginTransaction(); try { session.save(obj); tran.commit(); } catch (Exception e) { // TODO: handle exception tran.rollback(); } finally{ session.close(); } } public void update(Object obj){ Session session = DbConn.getSession(); Transaction tran = session.beginTransaction(); try { session.update(obj); tran.commit(); } catch (Exception e) { // TODO: handle exception tran.rollback(); } finally{ session.close(); } } public void saveOrUpdate(Object obj){ Session session = DbConn.getSession(); Transaction tran = session.beginTransaction(); try { session.saveOrUpdate(obj); tran.commit(); } catch (Exception e) { // TODO: handle exception tran.rollback(); } finally{ session.close(); } } public Object getById(int id , Class cls){ Object obj = new Object(); Session session = DbConn.getSession(); Transaction tran = session.beginTransaction(); try { obj = session.get(cls, id); tran.commit(); } catch (Exception e) { // TODO: handle exception tran.rollback(); } finally{ session.close(); } return obj; } public void delete(Object obj){ Session session = DbConn.getSession(); Transaction tran = session.beginTransaction(); try { session.delete(obj); tran.commit(); } catch (Exception e) { // TODO: handle exception tran.rollback(); } finally{ session.close(); } } }