我有一个 @ExceptionHandler(MethodArgumentNotValidException.class) 在验证失败时返回 HTTP 代码 400。我创建了一个自定义注释,需要将 HTTP 代码更改为 422。但是,由于异常处理程序已经使用 @ResponseStatus(code = HttpStatus.BAD_REQUEST) 注释,我该怎么做呢?
我认为也许可以使我的自定义注释抛出自定义异常,然后捕获它。那可能吗?如何?
我的休息控制器建议:
@RestControllerAdvice
public class ManipuladorDeExcecoes {
@Autowired
MessageSource messageSource;
@ResponseStatus(code = HttpStatus.BAD_REQUEST)
@ExceptionHandler(MethodArgumentNotValidException.class)
public List<ErroPadrao> handle(MethodArgumentNotValidException exception) {
List<ErroPadrao> listaDeErros = new ArrayList<>();
List<FieldError> fieldErrors = exception.getBindingResult().getFieldErrors();
fieldErrors.forEach(e -> {
String mensagem = messageSource.getMessage(e, LocaleContextHolder.getLocale());
ErroPadrao erro = new ErroPadrao(e.getField(), mensagem);
listaDeErros.add(erro);
});
return listaDeErros;
}
}
我的自定义注释:
@Constraint(validatedBy = ValorUnicoValidator.class )
@Target({ FIELD })
@Retention(RUNTIME)
public @interface ValorUnico {
String message() default "O valor informado já existe no banco de dados";
String campo();
Class<?> tabela();
boolean removeStrings() default false;
Class<?>[] groups() default {};
Class<? extends Payload>[] payload() default {};
}
我的验证器:
public class ValorUnicoValidator implements ConstraintValidator<ValorUnico, Object> {
@PersistenceContext
EntityManager entityManager;
private String campo;
private Class<?> tabela;
private boolean removeStrings;
@Override
public void initialize(ValorUnico constraintAnnotation) {
this.campo = constraintAnnotation.campo();
this.tabela = constraintAnnotation.tabela();
this.removeStrings = constraintAnnotation.removeStrings();
}
@Override
public boolean isValid(Object value, ConstraintValidatorContext context) {
if (removeStrings) {
value = value.toString().replaceAll("[^0-9]", "");
}
Boolean valorJaExiste = entityManager
.createQuery("SELECT COUNT(t) < 1 FROM " + tabela.getName() + " t WHERE "
+ campo + " = :pValor", Boolean.class)
.setParameter("pValor", value)
.getSingleResult();
return valorJaExiste;
}
}