//獲取當前項目的絕對路徑  public static String getTomcatPath(){   String nowpath;     String tempdir;   nowpath=System.getProperty("user.dir");   tempdir=nowpath.replace("bin", ""); //把bin 文件夾變到 webapps文件里面   return tempdir;  }  /** * 將圖片下載下來后，上傳到OSS * @param imgLink * @param downloadPath * @return * @throws Exception */ private String downloadImagAndUploadToOss(String imgLink,String downloadPath) throws Exception{  List<String> urlList=new ArrayList<String>();  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; }  /**   * 傳入要下載的圖片的url列表，將url所對應的圖片下載到本地   * @param urlList   * @throws Exception   */  private void downloadPicture(List<String> 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();    }  }   }