Learning objectives:

Using form validation annotations in Spring Boot
Checking for valid submissions in the controller
Displaying validation messages on the template

We start from this:

-bash-4.2$ pwd
/u/dgerman/apache/htdocs/spring-boot/fall2019/step07
-bash-4.2$ tree
.
+-- pom.xml
+-- src
    +-- main
        +-- java
        |   +-- com
        |       +-- example
        |           +-- demo
        |               +-- HomeController.java
        |               +-- SpringBoot07Application.java
        |               +-- Tvshow.java
        +-- resources
            +-- templates
                +-- tvform.html
                +-- tvshowconfirm.html

8 directories, 6 files
-bash-4.2$

From here on what do you think you need to do?