Ask HN: Standard Java webapp for managing user accounts?

I'm creating a Java servlet-based web application that needs to have the standard user account functions such as: - Creating a new user accounting including name, email and password - Storing the user details in a JDBC database using a strong password hash - Log in / logging out - Sending an email if the user forgot their password - Allow user to change their profile details, including password and email Is there a standard, open-source project I can use to save me the time of implementing this myself?