In this tutorial, we're gonna build a Spring Boot and Oracle example with database connection that uses Hibernate, Spring Data JPA to make CRUD Operations. You'll know:

• How to configure Spring Data, JPA, Hibernate to work with Oracle Database
• How to define Data Models and Repository interfaces
• Way to create Spring Rest Controller to process HTTP requests
• Way to use Spring Data JPA to interact with Oracle Database

Full Article at: https://bezkoder.com/spring-boot-hibernate-oracle/

Overview of Spring Boot and Oracle example

We will build a Spring Boot + Hibernate + Oracle example that exports Rest CRUD API for a Tutorial application:

• Each Tutotial has id, title, description, published status.
• Apis help to create, retrieve, update, delete Tutorials.
• Apis also support custom finder methods such as find by published status or by title.

These are APIs that we need to provide:

• We make CRUD operations & finder methods with Hibernate and Spring Data JPA's JpaRepository.
• The database will be Oracle 12c/19c by configuring project dependency & datasource.

When you run the Spring Boot + Oracle example, tutorials table will be automatically generated in Oracle Database.
You can see things like this:

Create some Tutorials:

Check Oracle database after create operation:

Update some Tutorials:

Check Oracle database after update operation:

Get all Tutorials:

Get a Tutorial by Id:

Find all published Tutorials:

Find all Tutorials which title contains 'ring':

Delete a Tutorial:

Check Oracle database after delete Operation:

Delete all Tutorials:

Now the table has no record:

You can also test this Spring Boot App with Client in one of these posts:

• Angular 8 CRUD Application example with Web API
• Angular 10 CRUD Application example with Web API
• Angular 11 CRUD Application example with Web API
• Vue 2 CRUD Application with Vue Router & Axios
• Vue 3 CRUD Application with Axios & Vue Router
• React CRUD example to consume Web API
• React Redux CRUD example with API calls

Technology

• Java 8
• Spring Boot 2 (with Spring Web MVC, Spring Data JPA)
• Oracle 12c or 19c
• Maven 3.6.1

Project Structure

Let me explain it briefly.

– Tutorial data model class corresponds to entity and table tutorials.
– TutorialRepository is an interface that extends JpaRepository for CRUD methods and custom finder methods. It will be autowired in TutorialController.
– TutorialController is a RestController which has request mapping methods for RESTful requests such as: getAllTutorials, createTutorial, updateTutorial, deleteTutorial, findByPublished...
– Configuration for Spring Datasource, JPA & Hibernate in application.properties.
– pom.xml contains dependencies for Spring Boot and Oracle.

For step by step and Github, please visit:
https://bezkoder.com/spring-boot-hibernate-oracle/

Further Reading

Spring Boot One To Many example with Spring JPA, Hibernate

If you want to add Pagination to this Spring project, you can find the instruction at:
Spring Boot Pagination & Filter example | Spring JPA, Pageable

To sort/order by multiple fields:
Spring Data JPA Sort/Order by multiple Columns | Spring Boot

Handle Exception for this Rest APIs is necessary:

• Spring Boot @ControllerAdvice & @ExceptionHandler example
• @RestControllerAdvice example in Spring Boot

Or way to write Unit Test for the JPA Repository:
Spring Boot Unit Test for JPA Repositiory with @DataJpaTest

More Practice:

• Spring Boot Rest XML example – Web service with XML Response
• Spring Boot Multipart File upload example
• Spring Boot Pagination and Sorting example