<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-validation</artifactId>
</dependency>
public class User {
@NotNull
private Long id;
@NotEmpty
@Size(min = 2, max = 20)
private String name;
}
@RestController
public class UserController {
@PostMapping("/users")
public ResponseEntity<String> createUser(@Valid @RequestBody User user) {
return ResponseEntity.ok("User created successfully");
}
}
