E-Commerce API

A backend e-commerce system built with Java and Spring Boot.

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Features

Products

• Create products
• View products
• Update products
• Delete products
• Track inventory

Users

• Create users
• View users
• Delete users

Orders

• Create orders
• Link orders to users
• Add multiple products per order
• Calculate total price automatically
• Transactional order creation

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Tech Stack

• Java 17
• Spring Boot
• Spring Data JPA
• PostgreSQL
• Docker
• Maven

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Database Structure

User → Orders → OrderItems → Products

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Project Structure

src
├── controller
├── dto
├── entity
├── repository
├── service

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Run Locally

1. Start PostgreSQL (Docker)

docker run --name ecommerce_postgres \
-e POSTGRES_PASSWORD=password \
-e POSTGRES_DB=ecommerce \
-p 5433:5432 \
-d postgres:16`

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Api

Create User

docker run --name ecommerce_postgres \
-e POSTGRES_PASSWORD=password \
-e POSTGRES_DB=ecommerce \
-p 5433:5432 \
-d postgres:16`

Create Product

curl -X POST http://localhost:8080/api/products \
-H "Content-Type: application/json" \
-d '{"name":"Keyboard","description":"Mechanical","price":99.99,"stockQuantity":10}'

Create Order

curl -X POST http://localhost:8080/api/orders \
-H "Content-Type: application/json" \
-d '{
"userId": 1,
"items": [
  {
    "productId": 1,
    "quantity": 2
  }
]
}'

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