Spring Security: Secure Java Web Applications and REST APIs

In modern software development, securing application data and user access is not optional—it is a critical requirement. Spring Security provides Java developers with the comprehensive tools needed to protect applications from unauthorized access and malicious threats. This written course guides you through the core principles of application security, starting from foundational concepts and moving step-by-step into practical implementations. You will transition from relying on default configurations to designing custom, robust security architectures for both traditional web applications and modern RESTful APIs. What you'll learn: - Understand the core concepts of authentication, authorization, and how Spring Security filters process incoming requests. - Configure custom user storage, password encoding, and role-based access controls to secure application resources. - Secure RESTful endpoints using stateless token-based authentication with JSON Web Tokens (JWT). - Apply modern method-level security using declarative annotations to control access at the service layer. - Explore the basics of modern OAuth2 and OpenID Connect flows for third-party integration. - Write robust security tests to verify your authentication and authorization rules during development. You will start by exploring basic security concepts and default Spring Boot configurations before gradually replacing them with custom security filter chains, database-backed authentication, and advanced API security patterns. Through detailed written explanations and clear code examples, you will learn how to secure every layer of your application. This course is designed for beginner to intermediate Java developers who are familiar with Spring Boot basics but have little to no prior experience with Spring Security. No advanced security background is required. Start reading today to build secure, production-ready Java applications with confidence.