struts文图片上传 并存入数据库 在jsp页面显示

package com.yourcompany; 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; /** * Data access object (DAO) for domain model class Upload. * @see com.yourcompany.Upload * @author MyEclipse - Hibernate Tools */ public class UploadDAO extends BaseHibernateDAO { private static final Log log = LogFactory.getLog(UploadDAO.class); //property constants public static final String IMG = "img"; public void save(Upload transientInstance) { log.debug("saving Upload instance"); try { getSession().save(transientInstance); log.debug("save successful"); } catch (RuntimeException re) { log.error("save failed", re); throw re; } } public void delete(Upload persistentInstance) { log.debug("deleting Upload instance"); try { getSession().delete(persistentInstance); log.debug("delete successful"); } catch (RuntimeException re) { log.error("delete failed", re); throw re; } } public Upload findById( java.lang.Integer id) { log.debug("getting Upload instance with id: " + id); try { Upload instance = (Upload) getSession() .get("com.yourcompany.Upload", id); return instance; } catch (RuntimeException re) { log.error("get failed", re); throw re; } } public List findByExample(Upload instance) { log.debug("finding Upload instance by example"); try { List results = getSession() .createCriteria("com.yourcompany.Upload") .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 Upload instance with property: " + propertyName + ", value: " + value); try { String queryString = "from Upload 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 findByImg(Object img) { return findByProperty(IMG, img); } public Upload merge(Upload detachedInstance) { log.debug("merging Upload instance"); try { Upload result = (Upload) getSession() .merge(detachedInstance); log.debug("merge successful"); return result; } catch (RuntimeException re) { log.error("merge failed", re); throw re; } } public void attachDirty(Upload instance) { log.debug("attaching dirty Upload instance"); try { getSession().saveOrUpdate(instance); log.debug("attach successful"); } catch (RuntimeException re) { log.error("attach failed", re); throw re; } } public void attachClean(Upload instance) { log.debug("attaching clean Upload instance"); try { getSession().lock(instance, LockMode.NONE); log.debug("attach successful"); } catch (RuntimeException re) { log.error("attach failed", re); throw re; } } }