📝 Journal App (Spring Boot Learning Project)

This project is a hands-on learning application built while studying Spring Boot, Spring Security, and backend development concepts.

The goal of this project is to practice and understand real-world backend development, including authentication, REST APIs, and application architecture.

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🎯 Learning Objectives

Through this project, I learned:

• ✅ Building REST APIs using Spring Boot
• ✅ Understanding Spring Security
• ✅ Implementing JWT Authentication
• ✅ Integrating Google OAuth2 Login
• ✅ Structuring a scalable backend project
• ✅ Working with databases (MongoDB / MySQL)
• ✅ Writing clean and maintainable code

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🚀 Features Implemented

• 🔐 User Authentication (Spring Security)
• 🔑 JWT-based Login System
• 🌐 Google OAuth2 Login
• 📝 CRUD Operations for Journal Entries
• 👤 User Management
• 📦 RESTful API Design

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🛠️ Tech Stack

• Backend: Spring Boot, Spring Security
• Database: MySQL
• Authentication: JWT + Google OAuth2
• Build Tool: Maven
• Other Tools: Lombok

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📂 Project Structure

src/main/java/com/springboot/journal_app
│
├── controller       # Handles API requests
├── service          # Business logic
├── repository       # Database operations
├── entity           # Data models
├── config           # Security & app configuration
└── util             # Helper classes

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🔑 Authentication Flow (Learning Implementation)

🔹 JWT Login

1. User registers/logs in
2. JWT token is generated
3. Token is used to access protected APIs

🔹 Google Login

1. User accesses /oauth2/authorization/google
2. Redirected to Google login
3. On success → user is created/logged in

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⚙️ Configuration

Update application.properties:

spring.security.oauth2.client.registration.google.client-id=YOUR_CLIENT_ID
spring.security.oauth2.client.registration.google.client-secret=YOUR_CLIENT_SECRET
spring.security.oauth2.client.registration.google.scope=email,profile

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▶️ How to Run

git clone https://github.com/your-username/journal-app.git
cd journal-app
mvn spring-boot:run

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📌 Note

⚠️ This project is created for learning purposes and may not follow all production-level best practices.

However, it demonstrates a strong understanding of:

• Backend development
• Authentication systems
• Spring ecosystem

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🔥 Future Improvements

• Add frontend (React / Angular)
• Improve security practices
• Add refresh tokens
• Deploy using Docker & AWS

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👨‍💻 Author

YASH SHRIVASTAV

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⭐ Acknowledgement

This project is part of my journey to becoming a better backend developer 🚀