javax.validation.constraints.notblank not working code example

Example 1: javax notblank not working

add in pom.xml

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

need restart intellij ide

Example 2: annotation spring notnull

<dependency>
    <groupId>org.hibernate.validator</groupId>
    <artifactId>hibernate-validator</artifactId>
</dependency>

with '@validateur' in application