Laurentiu Spilca

Spring Start Here, Second Edition by Laurenţiu Spilcă is a foundations-first introduction to the Spring framework. Perfect for Spring beginners, it steadily builds understanding through practical projects that explore the main ideas of Spring: configuration, beans, web endpoints, data access, and application structure. Whether you’re building directly with Spring Framework or optimizing apps you kick off with Spring Boot, you’ll move forward with the confidence that you really understand what’s going on under the hood.

Fully updated for Spring Framework 7 and Spring Boot 4, this practical book prepares you for fast development, clean application design, efficient cloud-native systems, and reliably-secure applications. Along the way, you’ll learn some best practices for applying your knowledge of Spring fundamentals when you’re using AI and agentic coding tools. Informative graphics, relevant examples, and author Laurenţiu Spilcă's clear and lively writing make it easy to pick up the skills you need.

This book is hands-on from start to finish. You’ll love how the simple projects illuminate the complex concepts that often trip up beginners. You'll refactor an existing application to Spring, use Spring tools to make SQL database requests and REST calls, and secure your projects with Spring Security. You’ll also get an insightful introduction to the vast Spring ecosystem.

Building on a successful first edition, this new revision adds coverage of Spring 7’s new tools such as RestClient, fresh coverage on approaching Spring in the AI-development era, and how to properly use AI when building Spring Apps.

Troubleshooting Java, Second Edition teaches practical techniques to diagnose, debug, and optimize Java applications. You’ll learn to uncover hidden dependencies, diagnose crashes, and resolve performance issues using tools like IntelliJ IDEA Debugger, VisualVM, and Heap Dump Analyzer. This revised and updated second edition introduces AI-powered troubleshooting tools, along with techniques for modern Java and cloud-native apps.

Spring Security in Action, Second Edition updates this bestselling guide to Spring Security to include deep coverage of OAuth2/OpenID Connect and security configuration using the new SecurityFilterChain. The crystal clear explanations and relevant examples, teach you how to build your own authorization server, configure secure endpoints, and prevent cross-site scripting and request forgery attacks.

Do you know how to use OAuth2 for authentication and authorization and properly implement internet security?

In this liveProject, you’ll learn to use Spring Security and OAuth 2 to build and secure backend microservices architecture. You’ll step into the role of a developer for health startup HealthX and work hands-on to create a system that can protect your users’ privacy, and scale up as your company grows. Each project in this series covers a different aspect of securing a microservices system, so you can pick the task most relevant to your career.

Precious tips and tricks on how to prepare for Java certification exams.

In real-world systems, services act sometimes as clients for other services. In this liveProject, you’ll implement a Spring Boot service that acts as a client for the OAuth 2 system. You’ll set up needed dependencies, register a client at the authorization server, and implement a proxy that uses the client credentials grant type. Finally, you’ll validate that the full setup works correctly and this mock server can accurately send advice to the health system.

In this liveProject, you’ll implement a gateway service that validates the access tokens and redirects the valid requests to a service-oriented system. You’ll configure the gateway routes and gateway authorization rules, redirecting the requests to the right business logic implementation.

In this liveProject, you will secure the backend of an app to protect users’ data, and design the backend as a resource server in an OAuth 2 system. You’ll configure resource server capabilities to apply endpoint and method authorization rules, and use authenticated principal details in the repository.

In this liveProject, you will implement an authorization server to authenticate users and issue JSON Web Tokens signed with a configured key. You'll use a Spring Boot service to take the role of an authorization server in an OAuth 2 system, set up storage for user and client details, and ensure user details persist in a secure way. Finally, you’ll write and conduct integration tests to make sure your system is secure and bug-free.

How to implement integration testing with Spring Security.

How to avoid mistakes with Spring Security that make your app vulnerable.

How to avoid faults when implementing an OAuth 2 system.

Tips & tricks that every Spring and Java developer should know.

Writing unit and integration tests, and understanding when to use one or the other.

How the evolution of software architecture, implementation, and testing affected Spring.

Troubleshooting Java: Read, debug, and optimize JVM applications presents practical techniques for exploring and repairing unfamiliar code. In it, you’ll learn timesaving practices for discovering hidden dependencies, discovering the root causes of crashes, and interpreting unexpected results. Go beyond profiling and debugging and start understanding how Java applications really work.

Spring Start Here teaches Java developers how to build applications using Spring framework. Informative graphics, relevant examples, and author Laurenţiu Spilcă's clear and lively writing make it easy to pick up the skills you need. You'll discover how to plan, write, and test applications. And by concentrating on the most important features, this no-nonsense book gives you a firm foundation for exploring Spring's rich ecosystem.

Spring Security in Action shows you how to prevent cross-site scripting and request forgery attacks before they do damage. You’ll start with the basics, simulating password upgrades and adding multiple types of authorization. As your skills grow, you'll adapt Spring Security to new architectures and create advanced OAuth2 configurations. By the time you're done, you'll have a customized Spring Security configuration that protects against threats both common and extraordinary.