利用JAVA中的接口设计和类集一起完成了一个简单的书店模型，通过接口的设计简化了操作中查询难度，是J2EE程序开发的一个基本雏形-The use of JAVA in the type of interface design and completed the set with a simple model of the bookstore, through the interface design simplifies the query operation of the difficulty