File list (Check if you may need any files):
ExamSystem\main.jsp
..........\SignUp.jsp
..........\query.jsp
..........\alter.jsp
..........\1.jpg
..........\success0.jsp
..........\xieyi.jsp
..........\c.jpg
..........\error3.jsp
..........\error0.jsp
..........\error2.jsp
..........\check.jsp
..........\staff.jsp
..........\WEB-INF\新建 文本文档.txt
..........\.......\web.xml
..........\.......\classes\DB.java
..........\.......\.......\SignUpAction.java
..........\.......\.......\AlterAction.java
..........\.......\.......\QueryAction.java
..........\.......\.......\AddSubject.java
..........\.......\.......\AddAction.java
..........\.......\.......\Student.java
..........\.......\.......\PayAction.java
..........\.......\.......\CheckAction.java
..........\.......\.......\CheckItAction.java
..........\.......\.......\LoginAction.java
..........\.......\.......\Staff.java
..........\.......\.......\one\Student.class
..........\.......\.......\...\Staff.class
..........\.......\.......\...\LoginAction.class
..........\.......\.......\...\QueryAction.class
..........\.......\.......\...\AlterAction.class
..........\.......\.......\...\AddAction.class
..........\.......\.......\...\AddSubject.class
..........\.......\.......\...\SignUpAction.class
..........\.......\.......\...\PayAction.class
..........\.......\.......\...\DB.class
..........\.......\.......\...\CheckAction.class
..........\.......\.......\...\CheckItAction.class
..........\.......\lib\msbase.jar
..........\.......\...\mssqlserver.jar
..........\.......\...\msutil.jar
..........\.......\classes\one
..........\.......\classes
..........\.......\lib
..........\WEB-INF
ExamSystem