/** * 查询图片,在Dao中 * */ public byte[] queryPhoto(String id) { byte[] b = null; List l = null; try { session = HibernateSessionFactory.getSession(); Transaction tran = session.beginTransaction(); Query q = session .createQuery("select new Project(ppicture) from Project where id=? and xdelete=0 "); q.setString(0, id); l = q.list(); System.out.println("photo size"+l.size()); Project s = (Project) l.get(0); b = s.getPpicture(); tran.commit(); } catch (Exception e) { e.printStackTrace(); } finally { HibernateSessionFactory.closeSession(); } return b; }
/**在Action中*/
public class ProjectShowPictAction extends Action {
public ActionForward execute(ActionMapping mapping, ActionForm actionform, HttpServletRequest request, HttpServletResponse response) throws Exception { String id=request.getParameter("id"); byte[] photo=null; ProjectDao pd=new ProjectDao(); if(id!=null&&!"".equals(id)){ photo=pd.queryPhoto(id); if(photo!=null){ response.setContentType("image/*"); response.getOutputStream().write(photo); response.getOutputStream().close(); } } return null; }}
/**在jsp页面中*/
<html:form action="/projectedit" enctype="multipart/form-data">
<img src="projectshowpict.do?id=<bean:write name="projectdetailform" property="pid" />" width="100" height="100"/> </td>
