Hibernate简单实例 Hibernate in Myeclipse

package hibernate3.object; import java.util.List; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.hibernate.LockMode; import org.hibernate.Query; import org.hibernate.criterion.Example; /** * A data access object (DAO) providing persistence and search support for * Employee entities. Transaction control of the save(), update() and delete() * operations can directly support Spring container-managed transactions or they * can be augmented to handle user-managed Spring transactions. Each of these * methods provides additional information for how to configure it for the * desired type of transaction control. * * @see hibernate3.object.Employee * @author MyEclipse Persistence Tools */ public class EmployeeDAO extends BaseHibernateDAO { private static final Log log = LogFactory.getLog(EmployeeDAO.class); // property constants public static final String NAME = "name"; public static final String ADDRESS = "address"; public static final String TITLE = "title"; public static final String SALARY = "salary"; public void save(Employee transientInstance) { log.debug("saving Employee instance"); try { getSession().save(transientInstance); log.debug("save successful"); } catch (RuntimeException re) { log.error("save failed", re); throw re; } } public void delete(Employee persistentInstance) { log.debug("deleting Employee instance"); try { getSession().delete(persistentInstance); log.debug("delete successful"); } catch (RuntimeException re) { log.error("delete failed", re); throw re; } } public Employee findById(java.lang.Integer id) { log.debug("getting Employee instance with id: " + id); try { Employee instance = (Employee) getSession().get( "hibernate3.object.Employee", id); return instance; } catch (RuntimeException re) { log.error("get failed", re); throw re; } } public List findByExample(Employee instance) { log.debug("finding Employee instance by example"); try { List results = getSession().createCriteria( "hibernate3.object.Employee").add(Example.create(instance)) .list(); log.debug("find by example successful, result size: " + results.size()); return results; } catch (RuntimeException re) { log.error("find by example failed", re); throw re; } } public List findByProperty(String propertyName, Object value) { log.debug("finding Employee instance with property: " + propertyName + ", value: " + value); try { String queryString = "from Employee as model where model." + propertyName + "= ?"; Query queryObject = getSession().createQuery(queryString); queryObject.setParameter(0, value); return queryObject.list(); } catch (RuntimeException re) { log.error("find by property name failed", re); throw re; } } public List findByName(Object name) { return findByProperty(NAME, name); } public List findByAddress(Object address) { return findByProperty(ADDRESS, address); } public List findByTitle(Object title) { return findByProperty(TITLE, title); } public List findBySalary(Object salary) { return findByProperty(SALARY, salary); } public List findAll() { log.debug("finding all Employee instances"); try { String queryString = "from Employee"; Query queryObject = getSession().createQuery(queryString); return queryObject.list(); } catch (RuntimeException re) { log.error("find all failed", re); throw re; } } public Employee merge(Employee detachedInstance) { log.debug("merging Employee instance"); try { Employee result = (Employee) getSession().merge(detachedInstance); log.debug("merge successful"); return result; } catch (RuntimeException re) { log.error("merge failed", re); throw re; } } public void attachDirty(Employee instance) { log.debug("attaching dirty Employee instance"); try { getSession().saveOrUpdate(instance); log.debug("attach successful"); } catch (RuntimeException re) { log.error("attach failed", re); throw re; } } public void attachClean(Employee instance) { log.debug("attaching clean Employee instance"); try { getSession().lock(instance, LockMode.NONE); log.debug("attach successful"); } catch (RuntimeException re) { log.error("attach failed", re); throw re; } } }