Spring-Crud-with-Services

This is a simple Spring Boot RESTful API project demonstrating a CRUD (Create, Read, Update, Delete) application with a layered architecture.
The project manages Employee entities and includes Controller, Service, DAO layers using Spring, JPA, and Hibernate.

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Features

• REST API for Employee entity
• CRUD operations:
  • Get all employees
  • Get employee by ID
  • Create new employee
  • Update existing employee
  • Delete employee by ID
• Uses Service layer for business logic
• DAO layer implemented with JPA and EntityManager
• Transaction management with @Transactional
• Proper layering: Controller -> Service -> DAO -> Entity

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Technologies Used

• Java 17 (or higher)
• Spring Boot
• Spring Data JPA (with EntityManager)
• Hibernate
• Maven
• H2 (or any other database configured by you)
• Jakarta Persistence API (JPA)

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Getting Started

Prerequisites

• Java 17+
• Maven
• IDE (Eclipse, IntelliJ, VS Code)
• Git

Running the Application

1. Clone the repository:

   git clone https://github.com/patodemjan/Spring-Crud-with-Services.git
   
    Navigate to the project folder:
   

cd Spring-Crud-with-Services

Build the project with Maven:

mvn clean install

Run the Spring Boot application:

mvn spring-boot:run

The API will start on http://localhost:8080/api/employees. API Endpoints HTTP Method Endpoint Description GET /api/employees Get all employees GET /api/employees/{id} Get employee by ID POST /api/employees Create new employee PUT /api/employees Update existing employee DELETE /api/employees/{id} Delete employee by ID Example Request with curl

Create a new employee:

curl -X POST -H "Content-Type: application/json" -d '{"firstName":"John", "lastName":"Doe", "email":"[email protected]"}' http://localhost:8080/api/employees

Get all employees:

curl http://localhost:8080/api/employees

Notes

Make sure to configure your database connection in application.properties.

Consider adding validation and exception handling for production use.

This is a learning/demo project and can be extended with DTOs, unit/integration tests, and API documentation.

License

This project is licensed under the MIT License - see the LICENSE file for details.