<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-validation</artifactId>
</dependency>
public class User {
private String username;
}
@RestController
@RequestMapping("/api/users")
public class UserController {
@PostMapping
public ResponseEntity<?> createUser(@Valid @RequestBody User user) {
return ResponseEntity.ok().build();
}
}
