多文件上传,同时改名，并生成缩略图
html:<script>function changeFileInput(){var num=$("fileSelect").value;while($("files").childNodes.length>0){$("files").removeChild($("files").childNodes);}for(var i=0;i<num;i++){filediv=document.createElement("div");file=document.createElement("input");file.type="file";file.name="file"+i;file.size="50";filediv.appendChild(file);$("files").appendChild(filediv);}}</script><td class="td_right"> <div id="files"> <html:file property="file" value="浏览..." size="50" onkeypress="event.returnValue=false;" ></html:file><br /> </div> <html:select property="fileSelect" size="1" onchange="changeFileInput()"><html:option value="1">1</html:option><html:option value="2">2</html:option><html:option value="3">3</html:option><html:option value="4">4</html:option><html:option value="5">5</html:option> </html:select> <input title="上传图片" class="button_y" name="upload" type="submit" value="上传图片"><span class="xing">图片小于65k</span> <html:errors/><a href="ledger.portal?action=download&id=fieldId">下载</a> <input title="图片管理" class="button_y" name="imageManage" type="submit" value="图片管理"> </td> </tr>
java:
if(request.getParameter("upload")!=null){System.out.println("---------------------upload---------------------");//struts多文件上传，JSP中<html:file>的property必须不一样！ System.out.println("----------多文件上传开始-------------"); String realPath=this.getServlet().getServletContext().getRealPath("/");if(realPath.endsWith("./")){//linux外网访问多了./ why???realPath=realPath.substring(0, realPath.length()-2);} String uploadPath = realPath + "UserFiles"+File.separator+"Image"; //上传文件存放目录 System.out.println("loadpath="+uploadPath);List<String> list = new ArrayList<String>();list.add("jpg"); list.add("jpeg"); list.add("gif"); list.add("bmp"); list.add("png");Hashtable hash=ledgerForm.getMultipartRequestHandler().getFileElements();//获得FormFile的数目,注意JSP中<html:file>的propertySystem.out.println("hash.size="+hash.size());int i=0;for (Enumeration e = hash.keys(); e.hasMoreElements(); ) { String key = (String) e.nextElement(); FormFile formfile = (FormFile) hash.get(key); String fileName = formfile.getFileName().trim(); //文件名 String contentType=formfile.getContentType();long size=formfile.getFileSize(); String extName=fileName.substring(fileName.lastIndexOf(".")+1).toLowerCase(); if(fileName==null||fileName.equals("")){//防没有文件时上传垃圾文件的bug System.out.println("文件名为空，跳出循环！");initNewsList(mapping,ledgerForm,request,response);return mapping.findForward("management");} if(!list.contains(extName)){ errors.add("error.image.contentType", new ActionMessage("error.image.contentType")); this.saveErrors(request, errors);// initNewsList(mapping,ledgerForm,request,response);// return mapping.findForward("management"); System.out.println("上传文件中有不符合扩展名要求的文件("+fileName+"),继续下一个上传文件..."); continue;//扩展名不符合要求就跳过他 } if(size>=1024*65){//65kerrors.add("error.image.size", new ActionMessage("error.image.size"));this.saveErrors(request, errors);//initNewsList(mapping,ledgerForm,request,response);//return mapping.findForward("management"); System.out.println("上传文件中有不符合大小要求的文件("+fileName+"),继续下一个上传文件..."); continue;//文件大小不符合要求就跳过他} Date date = new Date(System.currentTimeMillis()); SimpleDateFormat format = new SimpleDateFormat("yyyyMMddHHmmss");String newFileName= format.format(date)+"_"+i+"."+extName;i++; if (!"".equals(fileName)) { //不同的浏览器传上的文件名可能有区别，有的是全路径的 InputStream is = formfile.getInputStream(); OutputStream os = new FileOutputStream(uploadPath+File.separator+newFileName); int bytesRead = 0; byte[] buffer = new byte; while ((bytesRead = is.read(buffer, 0, 8192)) != -1) { os.write(buffer, 0, bytesRead); } os.close(); is.close(); } //////////////////////////////////// System.out.println("--------------图片放大缩小开始----------------"); String tempPath = realPath + "UserFiles"+File.separator+"temp"; //上传文件存放目录 int w=96; int h=-20; if(extName.equals("gif")){//解决生成gif图像时大小为0的bug extName="png"; } String oldPath=uploadPath+File.separator+newFileName;//Image文件夹 String newPath=tempPath+File.separator+newFileName;//temp文件夹 try{ Util.resize(oldPath, w, h, newPath, extName);// 图片放大缩小 }catch (Exception ex) {// TODO: handle exception System.out.println("出现异常时将原图直接写入temp文件夹，不要缩略了"); InputStream is = formfile.getInputStream(); OutputStream os = new FileOutputStream(newPath); int bytesRead = 0; byte[] buffer = new byte; while ((bytesRead = is.read(buffer, 0, 8192)) != -1) { os.write(buffer, 0, bytesRead); } os.close(); is.close(); Util.imageWidth=96;//异常时,当作96像素 Util.imageHeight=96;} System.out.println("--------------图片放大缩小结束----------------"); /////////////////////////////////////////////////// System.out.println("--------------保存缩略图/原图开始----------------"); ImageManage imageManage=new ImageManage(); imageManage.setDate(Util.getCurrentDate("yyyyMMddhhmmss")); imageManage.setImageName(newFileName);//缩略图名=原图名，只是文件夹不一样 imageManage.setUser(Util.userName); imageManage.setRemark("0"); imageManage.setWidth(Util.imageWidth);//保存图片宽高 imageManage.setHeight(Util.imageHeight); this.getLedgerService().save(imageManage); System.out.println("--------------保存缩略图/原图结束----------------");}//hash.clear(); System.out.println("----------多文件上传结束-------------"); ledgerForm.setFileSelect("1");initNewsList(mapping,ledgerForm,request,response);return mapping.findForward("management");}
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