分为管理员和普通用户，管理员可以对用户课程等进行增删改查等功能，普通用户只能进行查询功能等。数据库用的是mysql，jar包和数据库已完整包含。(It is divided into the administrator and the ordinary user, and the administrator can add and delete the user's course and other functions. The ordinary user can only carry out