JSP built-in object session error problem

Eclipse always prompts for errors when setting up a session for a user in a JSP, but the syntax is correct, so check out his error message:

A bit misleading me, I thought to not import which class, but think about, JSP nine large built-in objects are not required to import the class, it must be the wrong side,

I paste the code from other places about the session copy run, I found that can be used, I will step through the code and my Code side of the different,

Sure enough

At the beginning of the study when the page's session property is set to false, meaning that the page does not support the session, so it caused my page error.

Remove the session= "false" to make it.

JSP built-in object session error problem