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Java Database Connectivity (JDBC) is the bridge between the Java world and the database world. Spring Data JPA is a library that adds an extra layer of abstraction on top of the ORM JPA implementation. Hibernate is the most popular ORM (Object Relational Mapping) framework for working with a database, I leave it as my choice. The only thing you need to specify is the host for your database, and password password to access it to the database.