Java

https://www.javatpoint.com/spring-tutorial
https://spring.io/guides
https://digitaldefynd.com/best-spring-boot-mvc-tutorial/
REST API
https://www.youtube.com/watch?v=YLCeNwJSkk0&list=PLmbC-xnvykcghOSOJ1ZF6ja3aOgZAgaMO&index=18
https://spring.io/guides
https://hellokoding.com/
https://www.e4developer.com/2018/08/06/spring-boot-best-practices/
https://www.javaguides.net
https://www.javadevjournal.com/rest-with-spring-series
https://javapointers.com/
https://javabrains.io/topics/         (IMPORTANT)
https://github.com/arifhasnatnstucsteonGit/ProgrammingBooks    (IMPORTANT)
http://springtutorials.com/
https://spring.io/docs      (IMPORTANT)
https://docs.spring.io/spring/docs/current/spring-framework-reference/   (IMPORTANT)
https://repo.spring.io/release/org/springframework/spring/  (To download Spring Framework Library)
https://www.eclipse.org/aspectj/downloads.php       (To downlaod AspectJ Library)
https://www.eclipse.org/aspectj/doc/released/progguide/starting-aspectj.html   (IMPORTANT)
https://github.com/google/guice/tree/master/lib    (AOPALLIANCE)
https://docs.spring.io/spring/docs/2.0.x/reference/aop.html
https://www.eclipse.org/aspectj/doc/released/adk15notebook/index.html
https://docs.spring.io/spring/docs/2.0.x/reference/index.html