SpringFramework(9)
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6、ORM
(1)ORM
l ORM:对象关系映射(Object-Relational Mapping)
l 内建支持:
Ø JDO
Ø iBATIS
Ø Hibernate
(2)Hibernate配置
l 定义DataSource和Hibernate SessionFactory
... ....DB2Dialect
(3)HibernateTemplate
l 创建HibernateTemplate
SessionFactory sessionFactory = (SessionFactory) ctx.getBean("sessionFactory");HibernateTemplate hibernate = new HibernateTemplate(sessionFactory);
l 加载和更新
Employee e = (Employee) hibernate.load(Employee.class, "000330");e.setFirstName("BOB");hibernate.update(e);
l 使用方便的方法查询
List employees = hibernate.find("from app.Employee");List list = hibernate.find("from app.Employee e where e.lastName=?","LEE",Hibernate.STRING);List list = hibernate.find("from app.Employee e where e.lastName=? and e.firstName=?",new String[] { "BOB", "LEE" },new Type[] {Hibernate.STRING , Hibernate.STRING });
l 使用回调方法查询
List list = (List) hibernate.execute(new HibernateCallback() {public Object doInHibernate(Session session)throws HibernateException {List result = session.find("from app.Employee");// do some further stuff with the result listreturn result;}});
(4)异常处理
l 传递Hibernate异常到DataAccessException层
l 采用和JDBC相同的策略
(1)ORM
l ORM:对象关系映射(Object-Relational Mapping)
l 内建支持:
Ø JDO
Ø iBATIS
Ø Hibernate
(2)Hibernate配置
l 定义DataSource和Hibernate SessionFactory
(3)HibernateTemplate
l 创建HibernateTemplate
SessionFactory sessionFactory = (SessionFactory) ctx.getBean("sessionFactory");HibernateTemplate hibernate = new HibernateTemplate(sessionFactory);
l 加载和更新
Employee e = (Employee) hibernate.load(Employee.class, "000330");e.setFirstName("BOB");hibernate.update(e);
l 使用方便的方法查询
List employees = hibernate.find("from app.Employee");List list = hibernate.find("from app.Employee e where e.lastName=?","LEE",Hibernate.STRING);List list = hibernate.find("from app.Employee e where e.lastName=? and e.firstName=?",new String[] { "BOB", "LEE" },new Type[] {Hibernate.STRING , Hibernate.STRING });
l 使用回调方法查询
List list = (List) hibernate.execute(new HibernateCallback() {public Object doInHibernate(Session session)throws HibernateException {List result = session.find("from app.Employee");// do some further stuff with the result listreturn result;}});
(4)异常处理
l 传递Hibernate异常到DataAccessException层
l 采用和JDBC相同的策略
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