Request Body and Parameter Validation with Spring Boot

In this article, we will focus on the standard Java Validation API. We will discuss on the basics of bean validation using jakarta.validation annotations and APIs. The Request Body validation involves ensuring that the data sent in the request body confirms the expected structure. In Spring Boot @Valid and @RequestBody Annotations are used for Request body validation.

Lets Start to create a Spring boot project and will implement spring boot validations.

Go to browser and open https://start.spring.io/

I have just added two dependencies one is Spring Web and other is Validation (spring-boot-starter-validation).

<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-validation</artifactId>
</dependency>

Project imported to Intellij and running its working fine.

Let me create one controller class and will define one endpoint to create a user and will…