To help you get access to the material during the current, global COVID-19 crisis, all courses are 30% off until July 2: 

The “Learn Spring Data JPA” course focuses on building JPA repositories with Spring's persistence framework. 

The “Learn Spring” course. From no experience to actually building stuff with Spring and with Boot

The “REST API with Spring” tutorial Series

The “Persistence with Spring” Tutorial

The “JSON with Jackson” Tutorial Series

The “HttpClient” Tutorial Series

The “Java – Back to Basics” Tutorial Series

The “Learn Spring Boot” Tutorial Series

The “Spring Cloud” Tutorial Series

The “Mockito” Tutorial Series