Web Development

After learning the basics of the Spring Framework, let's dive into web development. Spring MVC provides powerful web development capabilities, similar to Express.js in the Node.js ecosystem, but with more comprehensive features.

Spring MVC Basics

MVC Architecture Pattern

Spring MVC follows the Model-View-Controller architecture pattern:

• Model: Data models and business logic
• View: User interface (usually JSON in REST APIs)
• Controller: Handles requests and responses

Controller Annotations

RESTful API Development

REST Principles

REST (Representational State Transfer) is a software architectural style:

• Resource-oriented: Use URIs to identify resources
• HTTP Methods: Use standard HTTP methods to operate on resources
• Stateless: Each request contains all necessary information
• Uniform Interface: Standardized interface design

Request Mapping and Parameters

Path Variables and Request Parameters

Response Handling

ResponseEntity and HTTP Status Codes

Database Integration with JPA

Entity and Repository

Frontend-Backend Separation

CORS Configuration

API Documentation with Swagger

Error Handling

Global Exception Handler

Summary

Spring MVC provides comprehensive web development capabilities:

1. MVC Architecture: Clear separation of concerns
2. RESTful APIs: Standard HTTP-based APIs
3. Request Mapping: Flexible URL mapping and parameter handling
4. Response Handling: Proper HTTP status codes and headers
5. Database Integration: Seamless JPA integration
6. CORS Support: Cross-origin resource sharing
7. API Documentation: Swagger integration
8. Error Handling: Global exception handling

As a JavaScript developer, you'll find that Spring MVC offers similar functionality to Express.js but with stronger typing, better dependency injection, and more comprehensive enterprise features.

Exercises

1. Create a RESTful API with CRUD operations
2. Implement proper error handling with global exception handler
3. Configure CORS for frontend integration
4. Add Swagger documentation to your API
5. Implement pagination and filtering in your API endpoints

Next Steps

In the next module, we'll explore practical projects and real-world applications using Spring Boot and Java.