系统可以采用任何一种流行的，Java支持的数据库，本系统采用了Microsoft公司的SQL Server2000作为后台数据库。通过对现在流行的一些Icq的参考，建立数据库，名为javaicq,数据库共建立两个表，一个是用户的基本信息,包括呢称，Jicq号码等。一个是用户的好友表，包括用户自己的号码和好友的号码。-system can use any of the popular Java database support, the system uses Microsoft's SQL Server 2000 database as a background. Right now through some popular Icq reference database, called javaicq, has set up two database tables, a user's basic information, including infant, Jicq numbers. One is the user's buddy list, including the user's own numbers and the number of friends.