Spring Boot In Action — Updated Cracked

The official Spring website features dozens of . These are short, hyper-focused tutorials that take 15–30 minutes to complete. They walk you through practical tasks like building a hypermedia-driven RESTful web service or validating user input. 3. Baeldung

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: Simplify your build configuration by using curated sets of dependencies (Starters) that automatically pull in the compatible libraries you need for specific tasks, like web development or data access. Automatic Configuration

The central thesis of the book—and the framework—is removing the friction of setup. Craig Walls masterfully explains how Spring Boot achieves "opinionated defaults."

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<!-- Maven --> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> </dependencies>

To activate a specific profile at runtime, pass the environment flag during execution: java -jar demo-app.jar --spring.profiles.active=prod Use code with caution. Type-Safe Configuration Binding

spring-boot-starter-data-jpa : Pulls in Hibernate and Spring Data JPA for database management. 3. The Actuator

While defaults are great, real-world apps require customization. The book guides you through externalizing configuration using application.properties or application.yml files, leveraging profiles ( @Profile ) for different environments (dev, test, prod), and overriding default beans safely. 4. Data Persistence and Web Development