Tuscany SCA与Spring、Hibernate整合实例-简洁方法

package com.test.dao; import java.util.List; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.hibernate.LockMode; import org.springframework.context.ApplicationContext; import org.springframework.orm.hibernate3.support.HibernateDaoSupport; public class BaseDAO extends HibernateDaoSupport { private static final Log log = LogFactory.getLog(BaseDAO.class); private static BaseDAO instance=null; public BaseDAO(){ instance=this; } protected void initDao() { // do nothing } /** * 插入新实例 * @param transientInstance */ public void save(Object transientInstance) { log.debug("saving "+transientInstance.getClass().getName()+" instance"); try { getHibernateTemplate().save(transientInstance); log.debug("save successful"); } catch (RuntimeException re) { log.error("save failed", re); throw re; } } /** * 删除一实例 * @param persistentInstance */ public void delete(Object persistentInstance) { log.debug("saving "+persistentInstance.getClass().getName()+" instance"); try { getHibernateTemplate().delete(persistentInstance); log.debug("delete successful"); } catch (RuntimeException re) { log.error("delete failed", re); throw re; } } /** * 通过主键查询，得到唯一实例 * @param type * @param id * @return */ public Object findById(Class type, java.lang.Integer id) { log.debug("getting "+type.getName()+" instance with id: " + id); try { Object instance = getHibernateTemplate().get( type.getName(), id); return instance; } catch (RuntimeException re) { log.error("get failed", re); throw re; } } /** * 查找typ类型所有实例 * @param type * @return */ public List findAll(Class type) { log.debug("finding all "+type.getName()+ " instances"); try { String queryString = "from "+type.getName(); return getHibernateTemplate().find(queryString); } catch (RuntimeException re) { log.error("find all failed", re); throw re; } } /** * 更新实例，保证实例中id为已有 * @param detachedInstance * @return */ public Object merge(Object detachedInstance) { log.debug("saving "+detachedInstance.getClass().getName()+" instance"); try { Object result = getHibernateTemplate().merge( detachedInstance); log.debug("merge successful"); return result; } catch (RuntimeException re) { log.error("merge failed", re); throw re; } } /* public List findByExample(BaseEntity instance) { log.debug("finding BaseEntity instance by example"); try { List results = getHibernateTemplate().findByExample(instance); 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 BaseEntity instance with property: " + propertyName + ", value: " + value); try { String queryString = "from BaseEntity as model where model." + propertyName + "= ?"; return getHibernateTemplate().find(queryString, value); } catch (RuntimeException re) { log.error("find by property name failed", re); throw re; } } public void attachDirty(Student instance) { log.debug("attaching dirty Student instance"); try { getHibernateTemplate().saveOrUpdate(instance); log.debug("attach successful"); } catch (RuntimeException re) { log.error("attach failed", re); throw re; } } public void attachClean(Student instance) { log.debug("attaching clean Student instance"); try { getHibernateTemplate().lock(instance, LockMode.NONE); log.debug("attach successful"); } catch (RuntimeException re) { log.error("attach failed", re); throw re; } }*/ public static StudentDAO getFromApplicationContext(ApplicationContext ctx) { return (StudentDAO) ctx.getBean("StudentDAO"); } }