相册开发 struts spring javaEE ajax

package struts.action; import java.io.PrintWriter; import java.util.Iterator; import java.util.List; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; import org.apache.struts.action.Action; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; import org.jdom.Document; import org.jdom.Element; import org.jdom.output.Format; import org.jdom.output.XMLOutputter; import comm.Page; import services.ImageServices; import tools.SpringUnit; import bean.ImageBean; public class UpLoadAction extends Action { private PrintWriter out = null; private ImageServices services=null; public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception { services=(ImageServices) SpringUnit.getBean("imageServicesImpl"); out=response.getWriter(); String action=request.getParameter("action").trim(); if(action.equalsIgnoreCase("addpic")){ addPic(request,response); } else if(action.equalsIgnoreCase("listPic")){ listPic(request,response); }else if(action.equalsIgnoreCase("delPic")){ delPic(request,response); } return null; } private void delPic(HttpServletRequest request, HttpServletResponse response) { int id=-1; try{ id=Integer.parseInt(request.getParameter("id").trim()); }catch (Exception e) { id=-1; } services.deleImg(id); listPic(request, response); } private void listPic(HttpServletRequest request, HttpServletResponse response) { response.reset(); response.setCharacterEncoding("GBK"); response.setContentType("application/xml"); Document doc = new Document(); Page page=page(request, response); List<ImageBean> lst=page.getDispList(); Element root= new Element("root"); Element element= new Element("msg"); element.setAttribute("pageId",page.getPageId()+""); element.setAttribute("pageCount",page.getPageCount()+""); element.setAttribute("pageSize",page.getPageSize()+""); root.addContent(element); for(ImageBean bean:lst){ if(!(bean.getBys()==null)){ element= new Element("listes"); element.setAttribute("id",bean.getId()==0?"no":bean.getId()+""); element.setAttribute("url",bean.getBys()==null?"no":"servlet/ShowPic?id="+bean.getId()); root.addContent(element); } } doc.addContent(root); XMLOutputter outputter = new XMLOutputter(Format.getPrettyFormat() .setEncoding("iso-8859-1")); try { outputter.output(doc, out); } catch (Exception ex) { } } private Page page(HttpServletRequest request,HttpServletResponse response){ String pageId; try{ pageId=request.getParameter("pageId").trim(); if(pageId==null||pageId.equalsIgnoreCase("")){ pageId="0"; } }catch (Exception e) { pageId="0"; } Page page=new Page(-1,services.listImg()); page.computePage(pageId); return page; } private void addPic(HttpServletRequest request, HttpServletResponse response) { DiskFileItemFactory factory=new DiskFileItemFactory(); ServletFileUpload file=new ServletFileUpload(factory); try { List lst=file.parseRequest(request); Iterator it=lst.iterator(); while(it.hasNext()){ FileItem fileItem=(FileItem)it.next(); if(fileItem.isFormField()){ } else{ byte buf[]=fileItem.get(); ImageBean bean=new ImageBean(); bean.setBys(buf); services.addImg(bean); request.setAttribute("upLoad message","上传成功"); }} }catch (Exception e) { request.setAttribute("upLoad message","上传失败"); e.printStackTrace(); } } }