Question

将不正确的日期格式绑定到XMLGregorianCalendar时，JaxB不会抛出异常。相反，它指定null。可能是什么问题？

@XmlAttribute(name = "travelEndDate", required = true)
@XmlSchemaType(name = "date")
protected XMLGregorianCalendar travelEndDate;

<xs:complexType name="SearchCriteria">
<xs:attribute name="travelStartDate" type="xs:date" use="required"/>
<xs:attribute name="travelEndDate" type="xs:date" use="required"/>
</xs:complexType>

Answer 1

注意：我是EclipseLink JAXB (MOXy)负责人，也是JAXB 2.X（JSR-222）专家组的成员。

这种行为在JAXB实现之间会有所不同。例如，如果值不正确，MOXy将抛出以下异常：

Exception in thread "main" javax.xml.bind.UnmarshalException
 - with linked exception:
[Exception [EclipseLink-3003] (Eclipse Persistence Services - 2.4.0.qualifier): org.eclipse.persistence.exceptions.ConversionException
Exception Description: Incorrect date format: [2011-02-50] (expected [YYYY-MM-DD])]
    at org.eclipse.persistence.jaxb.JAXBUnmarshaller.unmarshal(JAXBUnmarshaller.java:225)
    at forum254.Demo.main(Demo.java:18)
Caused by: Exception [EclipseLink-3003] (Eclipse Persistence Services - 2.4.0.qualifier): org.eclipse.persistence.exceptions.ConversionException
Exception Description: Incorrect date format: [2011-02-50] (expected [YYYY-MM-DD])
    at org.eclipse.persistence.exceptions.ConversionException.incorrectDateFormat(ConversionException.java:103)
    at org.eclipse.persistence.internal.oxm.XMLConversionManager.convertStringToXMLGregorianCalendar(XMLConversionManager.java:689)
    at org.eclipse.persistence.internal.oxm.XMLConversionManager.convertObjectToXMLGregorianCalendar(XMLConversionManager.java:278)
    at org.eclipse.persistence.internal.oxm.XMLConversionManager.convertObject(XMLConversionManager.java:249)
    at org.eclipse.persistence.oxm.XMLField.convertValueBasedOnSchemaType(XMLField.java:712)

解决方法

要在任何JAXB实现上报告错误，您可以在unmarshaller上设置XML架构以执行验证：

http://bdoughan.blogspot.com/2010/12/jaxb-and-marshalunmarshal-schema.html

或者您可以自己实现XmlAdapter来控制转换（并在必要时抛出异常）：

http://bdoughan.blogspot.com/2011/05/jaxb-and-joda-time-dates-and-times.html

Answer 2

也许此链接对您有所帮助：

http://eskatos.wordpress.com/2007/11/24/jaxb-custom-binding-for-joda-time/

它描述了使用自定义Java数据类型（此处为：JodaTime）处理XML中的日期

Answer 3

使用它，它将捕获异常：

try {
   String date = "your date here"
   XMLGregorianCalendar xmlGCal = DatatypeFactory.newInstance().newXMLGregorianCalendar(date);
    } catch (DatatypeConfigurationException ex) {
       //DO STUFF
      }

更新

添加代码后，我不确定你会怎么做到这一点。为此，我认为你需要进行空检查，并按照自己的意愿行事。

JaxB绑定XMLGregorianCalendar

3 个答案: