Here I have some links that I selected for some topics (which are highly recommended), and how I found them as well (if possible).
Projects: *jdbc*, *jpa_2023_cx_e1* (*x = 1, 2,...*), *jwt-demo*, *jwt-new-demo*, *jwt-example*
[Add Maven support to an existing project](https://www.jetbrains.com/help/idea/convert-a-regular-project-into-a-maven-project.html)

### MySQL
[PlanetScale](https://planetscale.com/learn/courses/mysql-for-developers/introduction/course-introduction)
I just came to [Hacker News](https://news.ycombinator.com/) (my favourite place on the Internet) and searched for *mysql*. Pretty simple, and I find it so cool (and free)!

### JDBC
[Macro Behler's blog](https://www.marcobehler.com/guides/jdbc)

### Spring Data JDBC
[Youtube - Dan Vega](https://www.youtube.com/watch?v=l_T0nQNbFiM)

### Transaction, locking
[The Geek Search](https://www.thegeeksearch.com/beginners-guide-to-transactions-and-locking-in-mysql/)
[Macro Behler's blog](https://www.marcobehler.com/guides/spring-transaction-management-transactional-in-depth)

### Thread and process
[tutorialandexample.com](https://www.tutorialandexample.com/process-and-thread-in-java)

### JPA/Hibernate, Spring Data...
[Jakarta Persistence API (JPA) specification](https://jakarta.ee/specifications/persistence/3.0/jakarta-persistence-spec-3.0.pdf)
[Youtube - Laur Spilca's playlist](https://www.youtube.com/playlist?list=PLEocw3gLFc8UYNv0uRG399GSggi8icTL6)
[Macro Behler's blog](https://www.marcobehler.com/guides/java-databases#commento)

### Spring MVC
[Macro Behler's blog](https://www.marcobehler.com/guides/spring-mvc#_what_is_spring_mvcs_dispatcherservlet)

### Design Pattern
[Youtube - Laur Spilca's playlist](https://www.youtube.com/playlist?list=PLEocw3gLFc8UDTj7f9qDwWNAngX7FXAYx)

### Spring Security
[Youtube - Laur Spilca's playlist](https://www.youtube.com/playlist?list=PLEocw3gLFc8X_a8hGWGaBnSkPFJmbb8QP)

### JWT
[Spring Security JWT - Youtube - Dan Vega](https://www.youtube.com/watch?v=KYNR5js2cXE)
[Authenticate with username and password - Youtube - Dan Vega](https://www.youtube.com/watch?v=UaB-0e76LdQ&t=115s)
[Symmetric Key Encryption - Youtube - Dan Vega](https://)
[JWT Authentication](https://www.youtube.com/watch?v=q2l91Ffc_8U)
[JWT Authentication + Database](https://www.youtube.com/watch?v=U5wQn5SVC08)

### Pending...
I seached for *logout with jwt spring boot* and found [this link](https://howtodoinjava.com/spring-security/jwt-auth-vuejs-spring-boot-security/). In general, that page seems to have some good stuff, so I will come back here.