ActionMessages msgs = new ActionMessages();

 TestUploadForm upForm = (TestUploadForm)form;  String  fileName = upForm.getPhoto().getFileName();//获取上传文件名称  int fileByteSize = upForm.getPhoto().getFileSize();//获取上传文件大小 -Byte    if(fileByteSize > BYTE_SIZE){//验证图片大小   msgs.add("photoSize", new ActionMessage("error.photo_size_empty"));   saveMessages(request, msgs);   return new ActionForward("/html/circle/album_add.vm?sid="+clForm.getSid(),false);  }    String fn = fileName.substring(fileName.lastIndexOf("."));  if( fn.equalsIgnoreCase(".jpg") || fn.equalsIgnoreCase(".gif")){//验证图片格式   Calendar calendar = new GregorianCalendar();   Date trialTime = new Date();   calendar.setTime(trialTime);   //使用当前时间创建保存图片的文件夹   String timePath = calendar.get(Calendar.YEAR)+"\\"+(calendar.get(Calendar.MONTH)+1)+"\\"+calendar.get(Calendar.DAY_OF_MONTH);   File uploadPath = new File(this.getServlet().getServletContext().getRealPath("uploads")+"\\photo\\"+timePath);   if(!uploadPath.exists())uploadPath.mkdirs();//如果文件夹不存在 创建文件夹   //设置存放图片的绝对地址   File upliadFile = new File(this.getServlet().getServletContext().getRealPath("uploads")+"\\circlePhoto\\"+timePath+"\\"+fileName);   BufferedOutputStream bos = null;   BufferedInputStream bis = null;   try {    bis = new BufferedInputStream(upForm.getPhoto().getInputStream());    Image img = javax.imageio.ImageIO.read(bis);    int photoWidth  = img.getWidth(null);    int photoHeight = img.getHeight(null);    //图片规格 不符合规范...生成略缩图    if (photoWidth > WIDTH || photoHeight > HEIGHT) {     BufferedImage bi = new BufferedImage(WIDTH, HEIGHT,BufferedImage.TYPE_INT_RGB);     bi.getGraphics().drawImage(img, 0, 0, WIDTH, HEIGHT, null);     bos = new BufferedOutputStream(new FileOutputStream(upliadFile));     JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(bos);     encoder.encode(bi);    } else {//包存原有图片大小     BufferedImage bi = new BufferedImage(photoWidth, photoHeight,BufferedImage.TYPE_INT_RGB);     bi.getGraphics().drawImage(img, 0, 0, photoWidth, photoHeight, null);     bos = new BufferedOutputStream(new FileOutputStream(upliadFile));     JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(bos);     encoder.encode(bi);    }    String path = (timePath+"\\"+fileName).replace("\\","/");        /**     * 最后向数据库中保存 图片地址     **/       }catch(Exception e){    e.printStackTrace();   }finally{    try{     if (bis != null)bis.close();     if (bos != null)bos.close();    }catch(IOException e) {     e.printStackTrace();    }   }  }else{   //格式不正确   msgs.add("photoType", new ActionMessage("error.photo_type_empty"));   saveMessages(request, msgs);   return new ActionForward("/html/circle/album_add.vm?sid="+clForm.getSid(),false);  }

 

第一次自己写上传操作.由很多不足的地方希望大家多多指教

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