用java语言简单实现数据库的初步功能，包括用户端、存储、查询、优化等功能，是初学DBMS设计者的很好范例。-Java language with a simple function of the realization of the initial database, including the client, storage, query, optimization and other functions, is a good learning example DBMS designers.

Java实现的简单数据库，实现简单查询，增加，删除，修改操作-Java implementation of a simple database to achieve a simple query, add, delete, modify operation