整理照片用的，扫描路径下所有图片，查看exif信息，生成md5码，并根据这信息整理到指定文件夹下。避免大量图片重复存储。(Sort out the photos, scan all the pictures under the path, check the EXIF information, generate the MD5 code, and sort the information into the specified folder according to this information. Avoid a large number of images to repeat storage.)