问题
when user login one side and another user login from same password and user name (from another machine ) ,at that time first user logout from automatically on every time when second user invalidate the first session. I am using the server side session , i have login flag in data base user is already login or not .any idea friends
回答1:
It is better if you try with Spring Security Single Sign-On implementation.
This link may be useful to you http://www.mkyong.com/tutorials/spring-security-tutorials/
来源：https://stackoverflow.com/questions/26138381/how-to-invalidate-the-session-in-spring-web-flow