1.1 What is shiro
Shiro is an open source framework of apache, a framework for rights management, which implements user authentication and user authorization.
There is spring security (formerly Acegi) in spring, which is a permission framework. It is too closely dependent on spring and is not as easy to use as shiro.
Shiro does not depend on spring. Shiro can not only implement authority management of web applications, but also C/S system and distributed system authority management. Shiro is a lightweight framework, and more and more enterprise projects begin to use shiro.
Using shiro to achieve system rights management, effectively improve development efficiency, thereby reducing development costs.