如何验证清单 @DecimalMin和@DecimalMax吗?
在我的Spring项目中,我有一个POJO类,该类具有CMYK颜色的属性。我希望此属性由具有4个浮点数的JSON数组表示。每个数字都必须在0.0
和之间1.0
。目前,我正在努力验证此属性。
我已经进行了研究,发现@DecimalMin
和@DecimalMax
注释不能在Float
或上使用float
(请参阅此问题的答案)。因此,我已经放弃了List<Float>
,List<BigDecimal>
取而代之。
这是我精简的POJO类:
public class Settings { @NotNull
@Size(min = 4, max = 4)
@DecimalMin("0")
@DecimalMax("1")
private List<BigDecimal> cmykColor;
public List<BigDecimal> getCmykColor() {
return cmykColor;
}
public void setCmykColor(List<BigDecimal> cmykColor) {
this.cmykColor = cmykColor;
}
}
这里是JUnit测试:
@RunWith(SpringRunner.class)@SpringBootTest
public class SettingsTest extends Assert {
@Autowired
private ObjectMapper objectMapper;
@Autowired
private Validator validator; // from org.springframework.validation
private Errors validate(String json) throws IOException {
Settings settings = objectMapper.readValue(json, Settings.class);
Errors errors = new BeanPropertyBindingResult(settings, "settings");
validator.validate(settings, errors);
return errors;
}
@Test
public void testValid() throws IOException {
String json = "{ \"cmykColor\": [0.5, 1.0, 0.3, 0.0] }";
Errors errors = validate(json);
assertEquals(0, errors.getErrorCount());
}
@Test
public void testTooBig() throws IOException {
String json = "{ \"cmykColor\": [0.5, 1.01, 0.3, 0.0] }";
Errors errors = validate(json);
assertEquals(1, errors.getErrorCount());
}
@Test
public void testTooMany() throws IOException {
String json = "{ \"cmykColor\": [0.5, 1.0, 0.3, 0.0, 0.0] }";
Errors errors = validate(json);
assertEquals(1, errors.getErrorCount());
assertNotNull(errors.getFieldError("cmykColor"));
}
}
当我注释掉@DecimalMin("0")
and
@DecimalMax("1")
注释时,所有测试用例都成功,当然testTooBig
测试用例除外,后者将依赖于@DecimalMax
约束。
但是,当我添加@DecimalMin("0")
和@DecimalMax("1")
注释时,在 测试用例上
得到以下异常,表示没有可用于DecimalMax
验证的验证器List<BigDecimal>
。
javax.validation.UnexpectedTypeException: HV000030: No validator could be found for constraint 'javax.validation.constraints.DecimalMax' validating type 'java.util.List<java.math.BigDecimal>'. Check configuration for 'cmykColor' at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.getExceptionForNullValidator(ConstraintTree.java:108)
at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.getInitializedConstraintValidator(ConstraintTree.java:140)
at org.hibernate.validator.internal.engine.constraintvalidation.SimpleConstraintTree.validateConstraints(SimpleConstraintTree.java:55)
at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints(ConstraintTree.java:73)
at org.hibernate.validator.internal.metadata.core.MetaConstraint.doValidateConstraint(MetaConstraint.java:127)
at org.hibernate.validator.internal.metadata.core.MetaConstraint.validateConstraint(MetaConstraint.java:120)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateMetaConstraint(ValidatorImpl.java:533)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForSingleDefaultGroupElement(ValidatorImpl.java:496)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForDefaultGroup(ValidatorImpl.java:465)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForCurrentGroup(ValidatorImpl.java:430)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext(ValidatorImpl.java:380)
at org.hibernate.validator.internal.engine.ValidatorImpl.validate(ValidatorImpl.java:169)
at org.springframework.validation.beanvalidation.SpringValidatorAdapter.validate(SpringValidatorAdapter.java:104)
at com.oce.spring.domain.SettingsTest.validate(SettingsTest.java:29)
at com.oce.spring.domain.SettingsTest.testTooMany(SettingsTest.java:58)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
...
所以,我应该如何使用@DecimalMin("0")
,并@DecimalMax("1")
在List<BigDecimal>
正确?
回答:
我们在Hibernate Validator 6.0.x中实现了容器元素约束。
因此,升级到Hibernate Validator 6.0.x(最新版本为6.0.9.Final)和Bean Validation
2.0.1,并执行以下操作:
@Size(...)private List<@DecimalMin(...) @DecimalMax(...) BigDecimal> cmykColor;
注意,Hibernate Validator 6.0的groupId为org.hibernate.validator。
以上是 如何验证清单 @DecimalMin和@DecimalMax吗? 的全部内容, 来源链接: utcz.com/qa/436495.html