Calendar calendar = Calendar.getInstance();

                /**按年月日来分*/

                int year = calendar.get(Calendar.YEAR);//得到年

                int month = calendar.get(Calendar.MONTH)+1;//得到月，因为从0开始的，所以要加1

                int day = calendar.get(Calendar.DAY_OF_MONTH);//得到天

String filename = String.valueOf(calendar.getTimeInMillis() + StrUtils.randomNumeric(5));

saveurl = Constants.ROOTPATH + url;

                String path1 = saveurl + year + "/" ;

                String path2 = saveurl + year + "/" + month + "/" ;

                String path3 = saveurl + year + "/" + month + "/" + day + "/" ;

                //建立按年月日文件夹,如果文件夹不存在,就建立新的文件夹。

                FileOperate.newFolder(path1);

                FileOperate.newFolder(path2);

                FileOperate.newFolder(path3);

                String pic_url = filename + "." + ext;

                saveurl = path3; //新的目录

                saveurl += pic_url; //保存路径

                //saveurl += filename;

                myFile.saveAs(saveurl, SmartUpload.SAVE_PHYSICAL);

                /**保存到数据库中的图片地址*/

                pic_url = year + "/" + month + "/" + day + "/" + pic_url;  //新的图片url
                

/**

     * 新建目录

     *

     * @param folderPath

     *            String 如 c:/fqf

     * @return boolean

     */

    public static void newFolder(String folderPath) {

        try {

            String filePath = folderPath;

            filePath = filePath.toString();

            java.io.File myFilePath = new java.io.File(filePath);

            if (!myFilePath.exists()) {

                myFilePath.mkdir();

            }

        } catch (Exception e) {

            //  //ln("新建目录操作出错 ");

            e.printStackTrace();

            log.error(e.getMessage(), e.fillInStackTrace());

        }

    }

public static String randomNumeric(int i) {

        return RandomStringUtils.randomNumeric(i);

    }