Shiro是apache旗下一个开源框架，它将软件系统的安全认证相关的功能抽取出来，实现用户身份认证，权限授权、加密、会话管理等功能，组成了一个通用的安全认证框架(Shiro is an open source framework of Apache's software system, it will be security related functions extracted, user authentication, authorization, encryption, session