springboot photo upload tools

public class UploadImgUtils {

    private static String savePath = "";

    /**
     * Upload photos Tools
     *
     * @Param File file
     * @Param workNo work order number
     * @Param Property configuration environment (dev, prod, test)
     * @return
     * @throws OperationException
     */
    public static String uploadImg(MultipartFile file, String workNo, String property) throws OperationException {
        if (file == null) {
            throw new OperationException(ReturnCodeEnum.OPERATION_IMG_IS_NULL);
        }
        if (file.getSize() > 1024 * 1024 * 1) {
            throw new OperationException(ReturnCodeEnum.OPERATION_IMG_SIZE_LARGE);
        }
        //获取文件后缀
        String suffix = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".") + 1);
        if (!"jpg,jpeg,gif,png".toUpperCase().contains(suffix.toUpperCase())) {
            throw new OperationException(ReturnCodeEnum.OPERATION_IMG_FORM_ERROR);
        }
        // to savePath been assigned 
        getProperties (property);
        SavePathFile File = new new File (savepath);
         IF (! SavePathFile.exists ()) {
             // If the existence of the directory, create a directory 
            savePathFile.mkdir ();
        }
        // labor single number as a unique identifier 
        String filename = workNo + + "." Suffix;
         the try {
             // save the file in the specified directory 
            file.transferTo ( new new File (savepath + filename));
        } catch (Exception e) {
            throw new OperationException(e, ReturnCodeEnum.OPERATION_SAVE_IMG_ERROR);
        }
        // Returns the file name of the 
        return savepath + filename;
    }

    /**
     * Reads the configuration information in the file.
     *
     * @return
     */
    private static void getProperties(String name) {
        YamlPropertiesFactoryBean factoryBean = new YamlPropertiesFactoryBean();
        factoryBean.setResources(new ClassPathResource("application-" + name + ".yml"));
        factoryBean.afterPropertiesSet();
        Properties object = factoryBean.getObject();
        savePath = (String) object.get("operation.savePath");
    }
}

Upload file above, the following method is used to obtain the environment variable configuration file