Design and develop Spring applications that are secure right from the start. Spring Security in Action, Second Edition is a revised version of the bestselling original, fully updated for Spring Boot 3 and Oauth2 OpenID Connect. This new edition covers the latest patterns for application-level security in Spring apps, demonstrating how Spring Security simplifies every step of the security process. Code samples and useful real-world examples give you hands-on experience of protecting your apps from common threats such as injection attacks and poor monitoring. Spring Security is essential for any Java developer looking to master authentication and authorization in Spring apps. By adopting secure by design principles with Spring Security's out-of-the-box features, you can protect your apps from data theft and unauthorized intrusions. Spring Security in Action, Second Edition reveals the Spring Security techniques and tools you need to defend your apps against attack. In this book, author Laurentiu Spilca, a skilled Java and Spring developer, will teach you how to build your own authorization server, manage system users, configure secure endpoints, and prevent cross-site scripting and request forgery attacks. This new second edition delves into the OAuth 2 OpenID Connect stack and details SecurityFilterChain for security configuration. Don't let security be an afterthought. Start protecting your apps from the first line of code! For experienced Java and Spring developers. All examples in this book use Java.