//上传xls文件到临时目录        if (! ServletFileUpload.isMultipartContent(request)) return;        DiskFileItemFactory factory = new DiskFileItemFactory();  // 建立factory        factory.setSizeThreshold(4*1024*1024);  // 设定缓存大小        ServletFileUpload upload = new ServletFileUpload(factory);        upload.setFileSizeMax(5120000);//5M                File srcFile = null;        try {            List<FileItem> items = upload.parseRequest(request);            for (FileItem item : items) {                if (!item.isFormField()) {                    String ext = StringUtils.substringAfterLast(item.getName(), ".").toLowerCase();                      //过滤文件格式                    if(StringUtils.isEmpty(ext) || !"xls".equalsIgnoreCase(ext)) {                        System.out.println("Unsupport file type: "+ext);                        throw new Exception("Unsupport file type: "+ext);                    }                                        String fileName = Long.toString(Calendar.getInstance().getTimeInMillis())+"."+ext;                   //临时目录                   String srcFilePath = "/tmp/" + fileName;                   srcFile = new File(srcFilePath);                   if (srcFile.exists()) {                       continue;                   }                   item.write(srcFile);                }            }        }catch (SizeLimitExceededException e){            e.printStackTrace();                    return;        }catch (FileUploadException fupEx) {            fupEx.printStackTrace();            return;        }

System.out.println("Upload url file begins ");    try {        String srcURL = request.getParameter("srcURL");        if(srcURL==null || srcURL.trim().length()<=0) {            throw new Exception("No url found ");        }                String ext = StringUtils.substringAfterLast(srcURL, ".").toLowerCase();          //初级过滤文件格式        if(app.getFileExts()!=null && !app.getFileExts().contains(ext)) {            throw new Exception("Unsupport file type: "+ext);        }                String fileName = Long.toString(Calendar.getInstance().getTimeInMillis())+"."+ext;        String srcFilePath = "/tmp/" + fileName;        URL urlfile = null;        HttpURLConnection httpUrl = null;        BufferedInputStream bis = null;        BufferedOutputStream bos = null;        File saveFile = new File(srcFilePath);        //file wall        String proxy = "192.168.1.1";        String port = "8080";        Properties systemProperties = System.getProperties();        systemProperties.setProperty("http.proxyHost",proxy);        systemProperties.setProperty("http.proxyPort",port);        try{            urlfile = new URL(srcURL);            httpUrl = (HttpURLConnection)urlfile.openConnection();            httpUrl.setConnectTimeout(3000);            httpUrl.setReadTimeout(60000);            httpUrl.connect();            bis = new BufferedInputStream(httpUrl.getInputStream());        }catch(Exception e)        {            e.printStackTrace();            System.out.println("Souce url connect failed:"+srcURL+" by "+e.getMessage());            return;        }        try{            int count = 0;            int size = 0;            bos = new BufferedOutputStream(new FileOutputStream(saveFile));            byte[] b = new byte[1024];            while((count=bis.read(b))!=-1) {                bos.write(b, 0, count);                size +=count;                if(size>=app.getFileSize()) {                    System.out.println("File size exceeded max limit ");                     return;                }            }        }catch(Exception e)         {            e.printStackTrace();            System.out.println("Save url file failed:"+srcURL+" by "+e.getMessage());            return;        }finally{            try{                bos.flush();                bis.close();                httpUrl.disconnect();            }catch(Exception e)            {                System.out.println(e.toString());            }        }