//获取当前项目的绝对路径 
 public static String getTomcatPath(){ 
  String nowpath;   
  String tempdir; 
  nowpath=System.getProperty("user.dir"); 
  tempdir=nowpath.replace("bin", ""); //把bin 文件夹变到 webapps文件里面 
  return tempdir; 
 } 
 /**
 * 将图片下载下来后，上传到OSS
 * @param imgLink
 * @param downloadPath
 * @return
 * @throws Exception
 */
 private String downloadImagAndUploadToOss(String imgLink,String downloadPath) throws Exception{
  List urlList=new ArrayList();
  urlList.add(imgLink);
  String imgName=DateUtil.formatDate(new Date(), "yyyyMMddhhmmss")+UuidUtil.createUUID()+".jpg";
  downloadPicture(urlList,downloadPath,imgName);
 String key="carAlbum/"+imgName;
 String imgUrl=OSSObjectAPI.genOssPicUrl(OSSObjectAPI.XI_AN_BUCKET_NAME,OSSObjectAPI.XIAN_ACCESS_ID,OSSObjectAPI.XIAN_ACCESS_KEY,
  "http://oss-cn-zhangjiakou.aliyuncs.com/",downloadPath+imgName,key);
 FileUtil.delete(downloadPath+imgName);
 return imgUrl;
 } 
 /** 
  * 传入要下载的图片的url列表，将url所对应的图片下载到本地 
  * @param urlList 
  * @throws Exception 
  */ 
 private void downloadPicture(List urlList,String path,String imgName) throws Exception { 
  if(urlList==null||urlList.size()==0){
   return;
  }
  URL url = null; 
  FileOutputStream fileOutputStream =null;
  InputStream inputStream =null;
  for (String urlString : urlList) { 
   try { 
     url = new URL(urlString);
     HttpURLConnection connection = (HttpURLConnection) url.openConnection();
     connection.addRequestProperty("User-Agent","Mozilla/5.0 (Windows NT 6.1; WOW64; rv:55.0) Gecko/20100101 Firefox/55.0");
     connection.setConnectTimeout(10 * 1000);
     connection.setReadTimeout(15 * 1000);
     inputStream = connection.getInputStream();
     byte[] buffer = new byte[1024];
     int length;
     fileOutputStream= new FileOutputStream(path+ File.separator+ imgName);
     while ((length = inputStream.read(buffer)) != -1) {
      fileOutputStream.write(buffer, 0, length);
     }
   } catch (Exception e) { 
    e.printStackTrace(); 
   } finally{
    inputStream.close();
    fileOutputStream.flush();
    fileOutputStream.close(); 
   }
  } 
 
 }