After logging in to the web application, I want to keep displaying the login user name on each screen.

The problem i am having

I don't know how it works, so I don't know what to implement.


-Immediately before the screen transition, the user name displayed on the screen is acquired and passed to the next screen as a parameter at the time of screen transition.

Supplementary information (FW/tool version, etc.)

Language: Java
FW: Spring Boot


I mentioned in the problem that I'm having "I don't know what kind of implementation to do", but I haven't implemented it yet.
In addition, the login function has not been implemented, and we are starting with a function that we can think of on our own.