Java获取网络图片上传到OSS

╰+哭是因爲堅強的太久メ 2022-06-01 08:07 138阅读 0赞

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();  
                }
            }  
    
        }