java - JSR-303 类型 java 字段验证是否始终/隐式在字段验证之前运行？

Question

如果我使用javax.validation.Validator来验证用约束注释的对象，它是否总是在对象之前评估字段级约束？

例如，如果我有:

@DummyClassValidation
public static class DummyClassToValidate {

    private Integer myNum;

    @Min(value = 50)
    @Max(value = 100)
    public Integer getMyNum() {
        return myNum;
    }

    public void setMyNum(Integer myNum) {
        this.myNum = myNum;
    }
}

我验证了它，是否保证 @DummyClassValidation 仅在 @Min 和 @Max 之后进行评估？我知道我可以使用分组来做到这一点，但如果不需要的话我宁愿不这样做(即字段验证隐式分组以在对象验证之前进行验证)。

Answer 1

每the specification ，第 3.5 节:

For a given group to validate, the validation routine applied on a given bean instance is expected to execute the following constraint validations in no particular order:

• for all reachable fields, execute all field level validations (including the ones expressed on superclasses) matching the targeted group unless the given validation constraint has already been processed during this validation routine for a given navigation path (see Section 3.5.1) as part of a previous group match.

• for all reachable getters, execute all getter level validations (including the ones expressed on interfaces and superclasses) matching the targeted group unless the given validation constraint has already been processed during this validation routine for a given navigation path (see Section 3.5.1) as part of a previous group match.

• execute all class level validations (including the ones expressed on interfaces and superclasses) matching the targeted group unless the given validation constraint has already been processed during this validation routine for a given navigation path (see Section 3.5.1) as part of a previous group match.

• for all reachable and cascadable associations, execute all cascading validations (see Section 3.5.1) including the ones expressed on interfaces and superclasses (see Section 3.4.5)

简而言之，除非您想找到一个能保证它的实现并坚持下去，否则您不能依赖它。