java获取网络图片上传到OSS的方法

//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<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;

}

/**

  * 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<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();

   }

  }

}