j2ee user authentication

https://www.google.com/?gws_rd=ssl#q=j2ee+user+authentication

http://www.javaworld.com/article/2072850/java-security/j2ee-security–container-versus-custom.html

https://docs.oracle.com/cd/E19253-01/817-6087/dgsecure.html

http://www.developer.com/security/article.php/3467801/Securing-J2EE-Applications-with-a-Servlet-Filter.htm

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=8&cad=rja&uact=8&ved=0CFIQtwIwB2oVChMIkNiypZzFyAIVStQeCh1-4gsf&url=http://www.youtube.com/watch?v=_uMdTPWsSSA&usg=AFQjCNE-7q1ZPEDFxjScI-Ztajh1nlyAHg&bvm=bv.105039540,d.cWw