Spring Boot + Oracle example: Build a CRUD app

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:

Methods	Urls	Actions
POST	/api/tutorials	create new Tutorial
GET	/api/tutorials	retrieve all Tutorials
GET	/api/tutorials/:id	retrieve a Tutorial by `:id`
PUT	/api/tutorials/:id	update a Tutorial by `:id`
DELETE	/api/tutorials/:id	delete a Tutorial by `:id`
DELETE	/api/tutorials	delete all Tutorials
GET	/api/tutorials/published	find all published Tutorials
GET	/api/tutorials?title=[keyword]	find all Tutorials which title contains `keyword`

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:

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.