Object-Relational Mapping (ORM), JPA, and Hibernate
Object-Relational Mapping (ORM) is a technique that maps the data stored in a relational database to an object-oriented programming language, like Java. This technique makes it easier for developers to work with databases and enables them to use object-oriented concepts like inheritance, polymorphism, and encapsulation in their applications.
When working with Spring Boot, ORM plays a crucial role in integrating the application with a database. This is where JPA and Hibernate come in. JPA stands for Java Persistence API, which is a specification for ORM in Java. Hibernate, on the other hand, is an implementation of the JPA specification.
So, why use JPA and Hibernate instead of writing SQL queries directly? One reason is that ORM frameworks like JPA and Hibernate provide a level of abstraction that simplifies the database access process. This means that developers can focus on writing the application logic instead of worrying about how to communicate with the database. Another reason is that ORM frameworks can automatically generate SQL queries based on the Java code, which saves developers time and reduces the likelihood of errors.
When working with JPA, there are several different implementations to choose from, including Hibernate, EclipseLink, and OpenJPA. Hibernate is one of the most popular implementations and provides a wide range of features that make it easier to work with JPA.
One question that often comes up is, what is the difference between JPA and Hibernate? JPA is a specification, while Hibernate is an implementation of that specification. In other words, JPA defines the API for ORM in Java, while Hibernate is the actual software that implements that API.
It's also important to note that while Hibernate is a powerful and feature-rich ORM framework, it's not the only one available. There are other popular frameworks like MyBatis, which can be used alongside JPA to provide additional functionality.
Смотрите видео Object-Relational Mapping (ORM), JPA, and Hibernate онлайн без регистрации, длительностью часов минут секунд в хорошем качестве. Это видео добавил пользователь Learn with Monir 22 Март 2023, не забудьте поделиться им ссылкой с друзьями и знакомыми, на нашем сайте его посмотрели 1,007 раз и оно понравилось 14 людям.