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This article introduces the relevant knowledge of "what is the tomcat session generation mechanism". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

The tomcat underlying maintains a ConcurrentHashMap whose key is jessionId and its value is session

After initiating a request from a browser, tomcat will first parse the request header to see if there is a cookie with the corresponding name (JessionId). In some cases, it will look for session based on this cookie value. If it is not found, it will be created, and the session will be returned if it is not found. This leads to the same sessionId if the same browser logs in to two accounts without special treatment.

Solution: clear the cookie value of jessionId when requesting background

Do not use the default session generation mechanism of tomcat

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