You will see the full source code of the demo. You will see how to use:
1. Text Plain in Spring Restful Web Services
2. Text HTML in Spring Restful Web Services
3. Use Parameters in Spring Restful Web Services
4. Convert Object to/from JSON in Spring Restful Web Services
5. Convert List Objects to/from JSON in Spring Restful Web Services
6. Use POST Method in Spring Restful Web Services
7. Use PUT Method in Spring Restful Web Services
8. Use DELETE Method in Spring Restful Web Services
9. Convert List Objects to/from JSON in Spring Restful Web Services and Spring Data JPA
10. Create Operator in Spring Restful Web Services and Spring Data JPA
11. Update Operator in Spring Restful Web Services and Spring Data JPA
12. Delete Operator in Spring Restful Web Services and Spring Data JPA
13. Security in Spring Restful Web Services

You also see the results after the demo with the illustrations.

You can also copy the code in this app and use it on your project.