实现对文档的加密解密功能，能方便的完成此项任务-Implementation of document encryption and decryption functions, to facilitate the completion of the mission

本程序给出了多种常见文档基于文档内容的智能识别，以及文档是否加密自动识别。-This program gives a variety of common document based on the intelligent identification document content, and whether the document encryption automatic identification.