By establishing the mapping among user, role and right, it can decrease the cost and load of access rights management, and at the same time, it provides a good method with the implementation of portal website. 在此模型中,通过建立用户/角色/权限三者之间的映射关系,减小了权限管理的负担和代价,同时为实现个性化门户网站奠定了基础。