How to use its session management system (session), to achieve access control when java web uses the shiro framework in a project that is separated from the front and back ends?

the project we developed is a shiro framework that separates the foreground from the background and uses the backstage framework. The problem now is that the foreground and background systems are two sets of systems. How to achieve a function similar to single sign-on?
provides a user login solution, preferably with a complete demo,. Thank you!

Jan.08,2022
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b2b7f2-2ba9a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b2b7f2-2ba9a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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