能够采集人脸并且对照数据库识别进行登录，本程序采用纯jdbc+servlet实现，有大牛觉得哪不对的，请指出，好让我这菜鸟学习学习。(It can collect face and register with database recognition. This program is implemented by pure jdbc+servlet. There is something wrong with Daniel. Please point out, so that I can lea