June 2018
Intermediate to advanced
302 pages
6h 48m
English
Content preview from Hands-On Full Stack Development with Spring Boot 2.0 and React
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Chapter 2
Answer 1: ORM is a technique that allows you to fetch and manipulate from a database using an object-oriented programming paradigm. JPA provides object-relational mapping for Java developers. Hibernate is Java-based JPA implementation.
Answer 2: Entity class is just standard java class that is annotated with the @Entity annotation. Inside the class you have to implement constructors, fields, getters and setters. The field(s) that will be the unique id is annotated with the @Id annotation.
Answer 3: You have to create a new interface that extends Spring Data CrudRepository interface. In the type arguments you define the entity and the type of the id field, for example, <Car, Long>.
Answer 4: CrudRepository provides all CRUD operations ...
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