Maven:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-validation</artifactId>
</dependency>
Gradle:
groovy
implementation 'org.springframework.boot:spring-boot-starter-validation'
public class User {
private String username;
private String email;
}
@RestController
@Validated
public class UserController {
@PostMapping("/users")
public ResponseEntity<String> createUser(@Valid @RequestBody User user) {
}
}
@RestControllerAdvice
public class GlobalExceptionHandler {
@ExceptionHandler(MethodArgumentNotValidException.class)
public ResponseEntity<String> handleValidationErrors(MethodArgumentNotValidException ex) {
List<String> errors = ex.getBindingResult().getAllErrors()
.stream()
.map(DefaultMessageSourceResolvable::getDefaultMessage)
.collect(Collectors.toList());
return ResponseEntity.badRequest().body(errors.toString());
}
}
