Nov 26, 2017 JPA / Hibernate Composite Primary Key Example with Spring Boot Rajeev Singh. Spring Boot. Nov 26, 2017. 6 mins read In this article, Youâll learn how to map a composite primary key in Hibernate using JPAâs @Embeddable and @EmbeddedId annotations. Configuring a JPA Entity Composite Primary Key Class. A composite primary key is usually made up of two or more primitive or JDK object types. Composite primary keys typically arise when mapping from legacy databases when the database key is comprised of several columns. Aug 08, 2017 Every JPA entity is required to have a field which maps to primary key of the database table. Such field must be annotated with @Id. Simple vs Composite primary keys. A simple primary key consists of a single Java field which maps to a single table column. A composite primary key consists of multiple Java fields which individually map to.
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