1.首先要先引入hibernate的jar包和相应数据库的驱动
2.配置hibernate.cfg.xml和相关bean的hbm.xml文件。
3.开启Configuration，SessionFactory 。
Configuration cfg = new Configuration().configure(); SessionFactory sf = cfg.buildSessionFactory();
4.打开session
Session sess1 = sf.openSession();
5.开启事物
Transaction transaction = sess1.beginTransaction();
6.开始增删改查
插入操作：
work.setCode(request.getParameter("code")); work.setName(request.getParameter("name")); work.setDetail(request.getParameter("detail")); work.setCount(Integer.parseInt(request.getParameter("count"))); sess1.save(work);transaction.commit();
修改操作：
String hql = "from Work where code='"+code+"'"; Query<Work> query= (sess4.createQuery(hql)); Work work = query.list().get(0); work.setName(name); work.setDetail(detail); work.setCount(count); transaction.commit();
查询操作：
String hql = "from Work where name='"+name+"'"; Query<Work> query= sess4.createQuery(hql); Work a = query.uniqueResult(); Work work = null; if (a != null) { work = query.list().get(0); }else{ work = null; } transaction.commit();
删除操作：
String hql = "delete from Work where code='"+code+"'"; int query = sess3.createQuery(hql).executeUpdate(); transaction.commit();
注：每次进行操作之后必须commit来将缓冲区内容清空并提交事务，不提交会造成锁的不释放。
flush()和clear()同样也是清空缓冲区提交事务的方法，但不建议使用。
事务执行完毕后要close
