Following book and implementing code examples.
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Chapter 2. Developing web applications
MVC; Thymeleaf; Controllers; -
Chapter 3. Working with data
Databases; JDBC vs Spring Data JPA;
The examples at this chapter do not work! The examples from the author are a mess, don't work and following the book step by step, there's code that magically appears / disappears at it's repository. I'm not gonna spend more hours fixing something the author should've done.