(This project was written in the fourth unit of Beida Qingniao. It uses hibernate, spring MVC and spring. Spring MVC is included in the spring structure, so it can also be said that it is an SH box. It also uses jquery, json and ztree. Note: This project only ends the menu, role and user classes of the login function, and there are more than ten classes that have not been written. Because no one cooperated when writing at that time, one person can only write so many, and there is no time to write later, for reference only!)