该实习为《Java EE实用教程（第二版）》的综合应用实现，设计具有代表性的网上学生成绩管理系统，实现了对学生，课程及成绩的增加，删除，修改，查找功能。(This practice design has the representative online student achievement management system, realizes the increase, the deletion, the revision, the search function to the stude