Spring boot 手动验证 validation 校验

import javax.validation.Validator;
@Autowired
private Validator validator;
 Set<ConstraintViolation<ThresholdRuleDTO.ThresholdRuleSaveDTO>> validate = validator.validate(param.getThresholdRule());
        if (validate.size() > 0) {
            return ResultUtils.error(validate.stream().iterator().next().getMessage());
        }