dao+c/s+jfrom做的考试系统界面美观,且有登陆界面,后续还要加上验证码,实现与数据库的连接. 这个系统实现类随机出题,何题型的难易程度控制,是个不可多得的好例子-to do the exam system dao+c/s+jfrom beautiful interface, and the login screen, follow-up verification code must be added to achieve the connection with the data