Blog Application Backend – REST API System

A production-ready Blog Management Backend API built using Java and Spring Boot. This application provides secure and scalable RESTful APIs for managing users, blog posts, categories, and comments.

The system implements JWT-based authentication and role-based authorization using Spring Security, ensuring secure access to protected endpoints. It follows a clean layered architecture with Controller → Service → Repository → Entity structure.

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🚀 Features

• User Registration & Authentication
• JWT-based Authentication & Authorization
• Role-based access using Spring Security
• Create, Update, Delete Blog Posts
• Category-based Blog Management
• Comment system for posts
• Pagination and sorting for posts
• Global Exception Handling
• Swagger API Documentation
• Cloud-ready backend architecture

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🛠 Tech Stack

• Language: Java
• Framework: Spring Boot
• Security: Spring Security + JWT
• Database: MySQL
• ORM: Hibernate / JPA
• API Style: REST APIs
• Documentation: Swagger (OpenAPI)
• Build Tool: Maven
• Cloud: AWS

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🏗 Project Architecture

The project follows a layered architecture:

Controller Layer
      ↓
Service Layer
      ↓
Repository Layer
      ↓
Database (MySQL)

Key components:

• Controller: Handles HTTP requests
• Service: Business logic
• Repository: Database operations
• Entity: Database models
• DTO: Data transfer between layers
• Exception Handler: Centralized error handling

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📂 Project Structure

blog-app-apis
│
├── controller
├── service
├── serviceImpl
├── repository
├── entity
├── payloads (DTOs)
├── config
├── security
├── exceptions
└── BlogAppApisApplication.java

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🔐 Authentication Flow

1. User registers in the system.
2. User logs in with email and password.
3. Server generates JWT Token.
4. Client sends JWT token in request header.
5. Spring Security validates token and authorizes access.

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📘 API Documentation

The APIs are documented using Swagger (OpenAPI).

Once the application is running, you can access the documentation at:

http://localhost:8080/swagger-ui/index.html

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⚙️ Installation & Setup

1 Clone Repository

git clone https://github.com/code-with-nabeel/Blog-Application-Backend-REST-API-System-.git

2 Navigate to Project

cd Blog-Application-Backend-REST-API-System-

3 Configure Database

Update application.properties

spring.datasource.url=jdbc:mysql://localhost:3306/blog_app
spring.datasource.username=your_username
spring.datasource.password=your_password

4 Run the Application

mvn spring-boot:run

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📊 Database Entities

Main entities in the system:

• User
• Post
• Category
• Comment

Relationships:

• One User → Many Posts
• One Category → Many Posts
• One Post → Many Comments

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☁️ Deployment

The application can be deployed on AWS cloud services such as:

• AWS EC2
• AWS RDS (MySQL)
• Docker container deployment

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📈 Future Improvements

• Image upload using AWS S3
• Email notifications
• Full-text search
• Caching with Redis
• Microservices architecture

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👨‍💻 Author

Nabeel Khan

Backend Developer Java | Spring Boot | REST APIs | Microservices

GitHub: https://github.com/code-with-nabeel