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: 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