SpringBoot中非rest方法的DTO约束验证

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

public class MyDTO {
    @NotBlank(message = "Name is required")
    private String name;
    
    // Other fields and getters/setters
}

@Service
@Validated
public class MyService {
    public void processData(@Valid MyDTO dto) {
        // Process the data
    }
}

@ControllerAdvice
public class GlobalExceptionHandler {
    @ExceptionHandler(MethodArgumentNotValidException.class)
    public ResponseEntity<Object> handleValidationException(MethodArgumentNotValidException ex) {
        List<String> errors = ex.getBindingResult().getAllErrors()
                .stream()
                .map(DefaultMessageSourceResolvable::getDefaultMessage)
                .collect(Collectors.toList());
        
        // Return the error response
    }
}