Java EE (J2EE) Tutorial for beginners Part18 - Implement existing user authentication, Sign In form

Java EE (J2EE) Tutorial for beginners Part18 - Setup existing user authentication functionality and implement user name availability validation when creating new user. Source code: https://github.com/ArthurVin/jee-tutorial-youtube Java EE (J2EE) Tutorial for beginners in one integration: Spring Framework + Spring Webflow + Spring Security + JPA (Hibernate) + JSF 2.0 (PrimeFaces) + Apache Maven 2 + Apache Tomcat + Subclipse + Oracle RDBMS + Eclipse IDE