sqlite轻量级数据库，文件型数据库，不需要安装数据库服务器。非常适合较小型需要数据库的程序。对sqlite 地城接口进行了封装。此数据库用起来十分方便-sqlite lightweight database, file database, no need to install the database server. Very suitable for smaller needs a database program. Town of sqlite interface of the package. This is very convenient to use the database