JPA @EntityListeners Example with Callbacks @PrePersist, @PostPersist, @PostLoad, @PreUpdate, @PostUpdate, @PreRemove, @PostRemove This page will provide JPA @EntityListeners example with callbacks @PrePersist, @PostPersist, @PostLoad, @PreUpdate, @PostUpdate, @PreRemove, @PostRemove. JPA EntityManager and EntityManagerFactory Example using Hibernate with persist(), find(), contains(), detach(), merge() and remove() This page will walk through JPA EntityManager and EntityManagerFactory example using hibernate with persist(), find(), contains(), detach(), merge() and remove() methods. JPA Entity Example | Java Persistence API JPA Entity is a java class referring to database table. It contains setter and getter method to save and fetch data from database. JPA provides annotation to correlate plain java class. JPA persistence.xml Example persistence.xml handles the configuration related task. persistence.xml file is kept in META-INF. We configure our entities in persistence.xml. JPA 2 Example | Java Persistence API JPA is Java Persistence API. JPA provides Object Relational Mapping (ORM) in Java. JPA handles the database query, database optimization, database cache, data saving, querying.