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Java persistence with JPA and Hibernate: Entities and relationships

The Jakarta Persistence API (JPA) is a Java specification that bridges the gap between relational databases and object-oriented programming. This two-part tutorial introduces JPA and explains how Java ...
InfoWorld

Java persistence with JPA and Hibernate: Persisting data to a database

You’ll also get started with JPA Query Language (JPQL) and use it to execute a few simple database operations on the example application. The complete source code for the example application can be ...