说明：  一、课程设计要求： 1、用到书上（课本或实验册）上的至少三个实例； 2、用到至少两种布局和至少四种组件； 3、用到对话框； 4、用到对数据库的查询、删除、添加和修改； 5、最好用到输入输出流； 6、具有一定的实际意义。
(A curriculum design requirements: 1, used in the book (textbook or experimental volumes) on at least three instances 2, used at least two layout and at least four components 3, use the dialog box 4, with to query the database, delete, add and modify 5, the best to use input and output streams 6, has a certain practical significance.)