Spring Framework

What is Spring?

The Spring Framework is a comprehensive framework for building Java applications, first released in 2003. Its core idea is Inversion of Control (IoC): instead of your code creating and wiring together the objects it depends on, Spring's container does that for you through Dependency Injection — making applications more modular, testable, and loosely coupled.

Spring has grown into an entire ecosystem — Spring MVC for web applications, Spring Data for database access, Spring Security for authentication, and Spring Boot (covered in its own course) for rapid, convention-based application setup. This course focuses on core Spring: the IoC container, Dependency Injection, Spring MVC, and AOP — the foundation everything else builds on.

Where is Spring Used?

Spring is one of the dominant frameworks in enterprise Java development. Here are the major application areas:

Real-World Examples

Here are some practical applications you can build using Spring:

Why Learn Spring?

Code Example

Here is a small taste of Spring — a service class with its dependency injected automatically by the container:

@Service
public class StudentService {

    private final StudentRepository repository;

    // Constructor injection — Spring provides the repository automatically
    @Autowired
    public StudentService(StudentRepository repository) {
        this.repository = repository;
    }

    public String getGrade(String name, double marks) {
        repository.save(name, marks);
        if (marks >= 60) return "First Class";
        if (marks >= 50) return "Second Class";
        return "Pass";
    }
}

Course Curriculum

Follow these 30 lessons sequentially to build a deep, practical understanding of the Spring Framework.

Projects You'll Build

Apply your knowledge by building these real-world projects:

Frequently Asked Questions

Key Takeaways & Summary