In the sixth part of our Spring Boot JDBC Phonebook Project series, we focus on applying and validating Email and Length constraints in your Spring Boot applications. Using the Phonebook Project as our example, learn how to implement these essential validation annotations to ensure data integrity and correctness. Watch as we demonstrate the practical application of these constraints and handle validation errors effectively. Don't forget to like, comment, and subscribe to TechDeveloper for more in-depth programming tutorials and project guides!.