Add any JSR 303 implementation to your classpath. Popular one used is Hibernate validator from Hibernate.
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>4.2.0.Final</version>
</dependen...
Suppose we have a simple class with validation annotations
public class UserDTO {
@NotEmpty
private String name;
@Min(18)
private int age;
//getters/setters
}
A controller to check the UserDTO validity.
@RestController
public class ValidationController {
@Reque...
