This is a simple CRUD (Create, Read, Update, Delete) application built using Spring Boot and H2 database. The application manages a list of items, allowing basic operations via a RESTful API.

• Create new items
• Retrieve all items
• Retrieve a single item by ID
• Update an existing item
• Delete an item by ID
• In-memory H2 database for easy setup and testing

• Java
• Spring Boot
• Spring Data JPA
• H2 Database
• Maven

• Java 11 or higher
• Maven

1. Clone the repository:

   git clone https://github.com/yourusername/crud-example.git
   cd crud-example

2. Build and run the application:

   ./mvnw spring-boot:run

3. Access the H2 database console:

   • URL: http://localhost:8009/h2-console
   • JDBC URL: jdbc:h2:mem:testdb
   • Username: sa
   • Password: (leave it empty)

• Create a new item

  • URL: POST /api/items
  • Request Body:

    {
        "name": "Item Name",
        "description": "Item Description"
    }

  • Response:

    {
        "id": 1,
        "name": "Item Name",
        "description": "Item Description"
    }

• Retrieve all items

  • URL: GET /api/items
  • Response:

    [
        {
            "id": 1,
            "name": "Item Name",
            "description": "Item Description"
        }
    ]

• Retrieve a single item by ID

  • URL: GET /api/items/{id}
  • Response:

    {
        "id": 1,
        "name": "Item Name",
        "description": "Item Description"
    }

• Update an existing item

  • URL: PUT /api/items/{id}
  • Request Body:

    {
        "name": "Updated Item Name",
        "description": "Updated Item Description"
    }

  • Response:

    {
        "id": 1,
        "name": "Updated Item Name",
        "description": "Updated Item Description"
    }

• Delete an item by ID

  • URL: DELETE /api/items/{id}
  • Response: 204 No Content