Hibernate的增刪查改

增加：

//獲得session
Configuration configuration = new Configuration();
ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();
SessionFactory sessionFactory = configuration.configure().buildSessionFactory(serviceRegistry);
Session session = sessionFactory.openSession();

//開啓事務
Transaction transaction = session.beginTransaction();

//新增
session.persist(user);//user爲想要新增的對象

//先提交事務後關閉session
transacition.commit();
session.close();

刪除：

///獲得session
Configuration configuration = new Configuration();
ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();
SessionFactory sessionFactory = configuration.configure().buildSessionFactory(serviceRegistry);
Session session = sessionFactory.openSession();

//開啓事務
Transaction transaction = session.beginTransaction();

//刪除
session.delete(user);//user爲想要刪除的對象

//先提交事務後關閉session
transacition.commit();
session.close();

查詢（查詢可不開啓事務）：

//獲得session
Configuration configuration = new Configuration();
ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();
SessionFactory sessionFactory = configuration.configure().buildSessionFactory(serviceRegistry);
Session session = sessionFactory.openSession();

String hql = "from User where id=:id";
Query query = session.createQuery(hql);
query.setParameter("id", 21);//參數
List objectList = query.list();//轉化成列表
session.close();

修改：

//獲得session
Configuration configuration = new Configuration();
ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();
SessionFactory sessionFactory = configuration.configure().buildSessionFactory(serviceRegistry);
Session session = sessionFactory.openSession();

//開啓事務
Transaction transaction = session.beginTransaction();

//更新
session.update(user);//user爲想要更新的對象

//先提交事務後關閉session
transacition.commit();
session.close();