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/**     * 图片上传     * @param file     * @return     * @throws IOException     * https://blog.csdn.net/softwave     * 2018-05-21 20:55:38     */    public String uploadFileWithoutWatermark(MultipartFile file) throws IOException{    	FileUtil fileUtil=new FileUtil();    	InputStream inputStream = file.getInputStream();//MultipartFile转成InputStream    	String extName=fileUtil.getFileType(file);//文件扩展名    	OSSClient ossClient = new OSSClient(ENDPOINT, ACCESS_KEY_ID, ACCESS_KEY_SECRET);    	String fileName=StringUtil.generatePrimaryKey();    	// 上传文件流    	PutObjectResult putObjectResult= ossClient.putObject(BUCKET_NAME, fileName+"."+extName, inputStream);    	String ret=putObjectResult.getETag();// 关闭client    	ossClient.shutdown();    	if(ret.equals("")){    		return "";    	}else{    		return HTTP_HOST+"/"+fileName+"."+extName;    	}    }

直接传入Spring Boot的MultipartFile对象来上传文件。