public class UploadImgUtils {

    private static String savePath = "";

    /**

     * 上传照片工具类

     *

     * @param file     文件

     * @param workNo   工单号

     * @param property 配置的环境（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);

        }

        //对savePath进行过赋值

        getProperties(property);

        File savePathFile = new File(savePath);

        if (!savePathFile.exists()) {

            //若不存在该目录，则创建目录

            savePathFile.mkdir();

        }

        //用工单号作为唯一的标识符

        String filename = workNo + "." + suffix;

        try {

            //将文件保存指定目录

            file.transferTo(new File(savePath + filename));

        } catch (Exception e) {

            throw new OperationException(e, ReturnCodeEnum.OPERATION_SAVE_IMG_ERROR);

        }

        //返回文件名称

        return savePath + filename;

    }

    /**

     * 读取配置文件中的信息.

     *

     * @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");

    }

}