如何在服务层中结合JSR-303和Spring Validator类? [英] How to combine JSR-303 and Spring Validator class in a service layer?

问题描述

我有一些模型课

public class Account {

    @Email
    private String email;

    @NotNull
    private String rule;
}

和spring-validator

and spring-validator

public class AccountValidator implements Validator {

    @Override
    public boolean supports(Class aClass) {
        return Account.class.equals(aClass);
    }

    @Override
    public void validate(Object obj, Errors errors) {
        Account account = (Account) obj;
        ValidationUtils.rejectIfEmpty(errors, "email", "email.required");
        ValidationUtils.rejectIfEmpty(errors, "rule", "rule.required");

        complexValidateRule(account.getRule(), errors);
    }

    private void complexValidateRule(String rule, Errors errors) {
        // ...
    }
}

我在服务中奔跑

AccountValidator validator = new AccountValidator();
Errors errors = new BeanPropertyBindingResult(account, "account");
validator.validate(account, errors);

我可以在验证过程中添加@ Email，@ NotNull(JSR-303)约束，而不在AccountValidator中描述这些规则吗?

Can I add to my validation process constraints @Email, @NotNull (JSR-303) and don't describe these rules in AccountValidator?

我知道spring-controllers中的@Valid如何工作，但是服务层又如何呢?是否有可能?如何以适当的方式进行这种验证?我可以使用Hibernate Validator吗?

I know how works @Valid in spring-controllers, but what's about service layer? Is it possible? How to do such kind of validation in a proper way? May I should use Hibernate Validator?

推荐答案

Spring提供了一个适配器来合并两个验证API. 请参阅当前的Spring JavaDoc 有关更多信息.

Spring provides an Adapter to merge both validation APIs. See the current Spring JavaDoc for more information.

可能的实现方式是

public class AccountValidator implements Validator {

  private final SpringValidatorAdapter validator;

  public AccountValidator(SpringValidatorAdapter validator) {
      super();
      this.validator = validator;
  }

  @Override
  public boolean supports(Class aClass) {
      return Account.class.equals(aClass);
  }

  @Override
  public void validate(Object obj, Errors errors) {

      //jsr303
      validator.validate(obj, errors);

      //custom rules
      Account account = (Account) obj;
      complexValidateRule(account.getRule(), errors);
  }

  private void complexValidateRule(String rule, Errors errors) {
      // ...
  }
}

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