Spring Boot Validations Explained | @Valid, Annotations & Custom Validation

Java Spring Boot Interview Q29 !! In this video, we dive deep into Spring Boot Validation with a practical REST API example. You’ll learn how to validate a user creation request using powerful validation annotations such as: @NotNull, @NotBlank, @NotEmpty, @Size, @Email, @Pattern, @Min, @Max, @Positive, @Negative, @Digits, @Past, @Future, and the @Valid annotation in Spring Boot. We’ll also cover: 1) Request validation in Spring Boot REST APIs 2) Using @Valid and @Validated annotations correctly 3) Handling validation errors with a Global Exception Handler (@RestControllerAdvice) 4) The complete step-by-step process of creating your own custom annotation for validation 5) How to apply the custom annotation in real-world REST API scenarios 6) Best practices for building production-ready Spring Boot applications with validations This is a complete Spring Boot validation tutorial — from built-in annotations to creating and using custom validators — with code examples you can apply directly in your projects. 00:00 : Introduction 01:17 : Validation Without Annotations 03:36 : @NotNull Annotation 05:50 : Global Exception Handler 11:53 : @NotEmpty Annotation 14:06 : @NotBlank Annotation 15:54 : @Size Annotation 17:33 : @Min and @Max Annotation 19:15 : @Positive and @Negative Annotation 20:42 : @Digits Annotation 23:15 : @Email Annotation 25:54 : @Pattern Annotation 30:28 : Create Custom Validations Global Exception Handler explained :    • Global Exception Handler explained : Java ...   Spring Boot Basics to Know : 1. Spring Boot and Java Setup    • Spring Boot and Java Setup   2. Project Object Model File | Understanding pom.xml    • Project Object Model File | Understanding ...   3. How to create an API ?    • How to create an API ?   4. How to Connect Spring Boot to a Database ?    • How to Connect Spring Boot to a Database ?   Instagram :   / the.curious_coder   #interview #springboot #java