java获取网络图片上传到OSS的方法

oss不支持通过一个网络地址来上传图片，所以若想将网络上的图片上传到oss上需要走点弯路。

1、通过链接将图片下载到本地的一个文件夹下面

2、用oss上传该文件夹下的文件

3、上传完成后删除本地的文件

具体代码如下：

 //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(); 
   }
  } 
 
 } 

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。