Java+sql教务系统大作业

改编一位大佬的，我做了界面优化，有几个sql为修改的废的。 sql名字为Administrators只需修改sa的名字

 属性            大小     日期    时间   名称
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     目录           0  2018-12-18 16:21  大作业\
     文件       70227  2018-12-07 09:53  大作业\1.jpg
     文件       50411  2018-12-07 09:53  大作业\2.jpg
     文件       63225  2018-12-07 09:54  大作业\3.jpg
     文件      300354  2018-12-10 15:02  大作业\44.jpg
     文件       22841  2018-12-07 09:55  大作业\5.jpg
     文件       21054  2018-12-07 09:55  大作业\6.jpg
     文件       34122  2018-12-07 09:55  大作业\7.jpg
     文件          80  2018-12-06 17:51  大作业\adm.sql
     目录           0  2018-12-09 15:33  大作业\API\
     文件        3181  2018-12-09 15:31  大作业\API\allclasses-frame.html
     文件        2701  2018-12-09 15:31  大作业\API\allclasses-noframe.html
     文件        3595  2018-12-09 15:31  大作业\API\constant-values.html
     文件        3583  2018-12-09 15:31  大作业\API\deprecated-list.html
     目录           0  2018-12-09 15:31  大作业\API\edu\
     目录           0  2018-12-09 15:31  大作业\API\edu\yxs\
     目录           0  2018-12-09 15:31  大作业\API\edu\yxs\sqldemo\
     文件        8434  2018-12-09 15:31  大作业\API\edu\yxs\sqldemo\Check.html
     目录           0  2018-12-09 15:31  大作业\API\edu\yxs\sqldemo\class-use\
     文件        4082  2018-12-09 15:31  大作业\API\edu\yxs\sqldemo\class-use\Check.html
     文件        4093  2018-12-09 15:31  大作业\API\edu\yxs\sqldemo\class-use\ClassM.html
     文件        4126  2018-12-09 15:31  大作业\API\edu\yxs\sqldemo\class-use\ClassMadd.html
     文件        4159  2018-12-09 15:31  大作业\API\edu\yxs\sqldemo\class-use\ClassMupdate.html
     文件        4049  2018-12-09 15:31  大作业\API\edu\yxs\sqldemo\class-use\CM.html
     文件        4082  2018-12-09 15:31  大作业\API\edu\yxs\sqldemo\class-use\CMadd.html
     文件        4115  2018-12-09 15:31  大作业\API\edu\yxs\sqldemo\class-use\CMupdate.html
     文件        4104  2018-12-09 15:31  大作业\API\edu\yxs\sqldemo\class-use\DLframe.html
     文件        4104  2018-12-09 15:31  大作业\API\edu\yxs\sqldemo\class-use\GLframe.html
     文件        4060  2018-12-09 15:31  大作业\API\edu\yxs\sqldemo\class-use\SCM.html
     文件        4093  2018-12-09 15:31  大作业\API\edu\yxs\sqldemo\class-use\SCMadd.html
     文件        4071  2018-12-09 15:31  大作业\API\edu\yxs\sqldemo\class-use\SCmg.html
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