AuthenticationUtil.java

public abstract class AuthenticationUtil {  
  
    public static String getUserName() {
        if (isAnonymous()) {
            return "anonymous";
        }

        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        return authentication == null ? null : authentication.getName();
    }
    
    public static boolean isAnonymous() {
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        boolean isAnonymous = AnonymousAuthenticationToken.class.isAssignableFrom(authentication.getClass());
        return isAnonymous;
    }
  
    public static boolean isAuthenticated() {
        return UserContext.getUserDetails() != null;
    }
}