给朋友写的读取硬盘序列号的程序，用j2ee编写，代码清晰易懂，附有简略的文档-Wrote to a friend to read the hard disk serial number of the procedures used to prepare j2ee, code clear and understandable, with a brief document

这是一个基于j2ee的图书管理系统的程序-This is a j2ee-based library management system procedures. . . . . . . .