实现图书管理功能，借出、归还、续借等 用到java和sql数据库一起编写而成的 -Management functions to achieve the book, lending, return, renewal, such as used with java and sql database has been prepared by the

一个简单的图书管理系统的java实现.主要是实现数据库里数据的操作。-A simple library management system realistic by java languange.