JPAstreamer – JPA Entities as Java Stream in Spring Boot
JPAstreamer helps in fetching and processing the JPA or hibernate entities in the same way as we process the POJOs using Java 8 Stream API.
Configure Hibernate with Spring Boot
Learn to configure hibernate/JPA support in Spring Boot2 applications, along with creating entity classes and extending inbuilt JpaRepository interfaces.
Spring REST CRUD Example with JPA Configuration
Learn to create REST APIs for crud operations using Spring REST and JPA configuration (H2 database as backend) without Spring boot auto configuration feature.
JPA Native DELETE Query: @NamedNativeQuery Example
JPA delete query example. Learn to use native SQL DELETE query in JPA using EntityManager’s executeUpdate() method.
JPA Native UPDATE Query: @NamedNativeQuery Example
JPA named query update example. Learn to use @NamedNativeQuery annotation to execute SQL update queries using EntityManager.cexecuteUpdate().
Hibernate / JPA @NamedNativeQuery Example
Learn to define and execute a named native SQL query using Hibernate @NamedNativeQuery annotation with examples.
Field / Property / Mixed Access Modes in JPA
In JPA, mapping information of an entity must be accessible to the ORM provider at runtime, so that when it is writing the data to storage, mapping information can be obtained from the entity instance. Similarly, when the entity state is loaded from the storage, the provider runtime must be …
JPA Find Entity Example
Learn to find JPA entities by ID or name using EntityManager.find(), JPQL queries, named queries, Criteria API, and Spring Data repository methods.
JPA merge and persist: What’s Difference?
In JPA, use merge when dealing with detached entities; and use persist to explicitly add a new entity to the database without checking if it already exists.
JPA Delete Entity Example
JPA delete entity example. Learn to delete JPA entity by id. Also learn to delete multple jpa entities using Java Persistence Query Language.
Configure JPA EntityManager without persistence.xml
Learn to configure the JPA in Spring application without the persistence.xml. We will see the XML and Java configuration examples.
Hibernate/JPA Persistence Annotations
Learn the basics and usage of JPA hibernate annotations used for creating entities, associations and named queries.