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在与日本宇宙航空研究开发机构联合进行XML时进行分类
原标题:ClassCastException while Unmarshalling XML with JAXB

我使用<代码>xjc,从根元素<代码>A的Xsd中生成了java级。

jaxb产生的基本要素是。 AType &无类别A

当我试图打上与这种xsd相对应的Xml并投出JaxbElement时,它就投下了一种 exception子:

Snippet:

JAXBContext jaxbContext = JAXBContext.newInstance(Class.forName("AType"));
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
AType aType = (AType) unmarshaller.unmarshal(new ByteArrayInputStream(xmlString.getBytes()));

例外:

java.lang.ClassCast例外: javax.xml.bind.JAXBElement

其他病例的Same代码适当而成功地实现了脱硫。

我怎么能找到<条码>unmarshal()给我什么类型的物体? 我没有把这一局势中出现的错误混为一谈,我曾尝试在<条码>jaxbElement的田野外印刷,但并不十分有用!

最佳回答

If the class of the root element (here: AType) doesn t contain the XmlRootElement-annotation, then the returned root element gets wrapped in a JAXBElement and you have to use its getValue()-method to get the root element.

AFAIK, XJC将只产生XmlRootElement-annotation,条件是该根元素的类型是匿名的。

问题回答

你可以努力这样做:

Object o = unmarshaller.unmarshal(...);
System.out.println(o.getClass().getName());




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