本系统首先需要登陆才能进行操作，实现功能为：对学生对象的增、删、改、查等操作，



系统权限不是太强。有兴趣的同学可在studentAction中的每个方法加上权限处理（即在每个方法



开始时先判断用户是否存在）

-needs of the system first landing operation can be carried out to achieve functional : Students object to the growth, delete, change, Zha operational, the system competence is not too strong. Interested students can studentAction of each method with authority (that is, in every way first judgment at the beginning of the existence of users)