Unable to fix java.lang.IllegalStateException: Unable to retrieve EntityManagerFactory for unitName
James P Dean
posted 2 years ago
I am trying to learn JSP and servlets by making a project. My goal is NOT to focus on JPA, ORM and persistence or even EJB for now. So, please do not tell me to read a tutorial or book on that. Unfortunately, I am not supposed to use SQL queries to interact with the database. Instead, I used pre-written JPA code to manage the persistence while I focus on jsp and servlets.