🛒 Spring Core Order Management Demo

A simple Spring Core (IoC + Dependency Injection) based Java application that demonstrates how to manage objects like Customer, Product, and Order using annotations and configuration classes.

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📌 Project Overview

This project showcases:

• Spring Annotation-based configuration
• Component Scanning
• Setter-based Dependency Injection
• Loose coupling using Spring IoC container

The application creates and links:

• A Customer
• A Product
• An Order (which depends on both)

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🧱 Project Structure

com.nit
│
├── config
│   └── AppConfig.java
│
├── sbeans
│   ├── Customer.java
│   ├── Product.java
│   └── Order.java
│
└── main
    └── TestOrder.java

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⚙️ Technologies Used

• Java
• Spring Core (Annotations)
• Eclipse / Any Java IDE

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🚀 How It Works

1. Spring container is initialized using AnnotationConfigApplicationContext

2. Components are auto-detected using @ComponentScan

3. Beans are created:

   • Customer
   • Product
   • Order

4. Dependencies are injected using @Autowired

5. Order object prints all details

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📂 Key Files Explanation

🔹 Configuration Class

• Defines component scanning

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🔹 Main Class

• Starts Spring container
• Retrieves beans and sets values

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🔹 Customer Bean

• Holds customer details

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🔹 Product Bean

• Holds product information

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🔹 Order Bean

• Injects Customer & Product using Spring

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▶️ Sample Output

Order [orderId=101, 
       customer=Customer [name=Pawan, email=pawan@gmail.com], 
       product=Product [productName=Laptop, price=70000.0]]

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🧠 Key Concepts Demonstrated

• IoC Container
• Dependency Injection (Setter Injection)
• Annotation-based configuration
• Bean lifecycle basics

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🛠️ How to Run

1. Import project into IDE
2. Add Spring Core dependencies (if not already added)
3. Run:

TestOrder.java

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📌 Future Improvements

• Add constructor injection
• Add XML configuration version
• Convert into Spring Boot project
• Add REST API layer

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👨‍💻 Author

Your Name

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⭐ If you like this project

Give it a star ⭐ and feel free to fork it!

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