JAXBException
在操作期间有多种创建方法marshal
:
1 - 封送一个无效的对象
您可以JAXBException
在编组操作期间通过编组JAXBContext
不知道的类的实例来生成 a(即以您的示例并使用它来编组 的实例Foo
)。这将产生以下异常。
Exception in thread "main" javax.xml.bind.JAXBException: class forum13389277.Foo nor any of its super class is known to this context.
at com.sun.xml.bind.v2.runtime.JAXBContextImpl.getBeanInfo(JAXBContextImpl.java:594)
at com.sun.xml.bind.v2.runtime.XMLSerializer.childAsRoot(XMLSerializer.java:482)
at com.sun.xml.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:315)
at com.sun.xml.bind.v2.runtime.MarshallerImpl.marshal(MarshallerImpl.java:244)
at javax.xml.bind.helpers.AbstractMarshallerImpl.marshal(AbstractMarshallerImpl.java:95)
at forum13272288.Demo.main(Demo.java:27)
2 - 封送无效输出
如果您尝试编组到无效输出,例如OutputStream
已关闭的输出:
FileOutputStream closedStream = new FileOutputStream("src/foo.xml");
closedStream.close();
jaxbMarshaller.marshal(this, closedStream);
然后你会得到一个MarshalException
它是一个子类JAXBException
。
Exception in thread "main" javax.xml.bind.MarshalException
- with linked exception:
[java.io.IOException: Stream Closed]
at com.sun.xml.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:320)
at com.sun.xml.bind.v2.runtime.MarshallerImpl.marshal(MarshallerImpl.java:244)
at javax.xml.bind.helpers.AbstractMarshallerImpl.marshal(AbstractMarshallerImpl.java:95)
at forum13272288.Demo.main(Demo.java:27)
Caused by: java.io.IOException: Stream Closed
at java.io.FileOutputStream.writeBytes(Native Method)
at java.io.FileOutputStream.write(FileOutputStream.java:318)
at com.sun.xml.bind.v2.runtime.output.UTF8XmlOutput.flushBuffer(UTF8XmlOutput.java:413)
at com.sun.xml.bind.v2.runtime.output.UTF8XmlOutput.endDocument(UTF8XmlOutput.java:137)
at com.sun.xml.bind.v2.runtime.output.IndentingUTF8XmlOutput.endDocument(IndentingUTF8XmlOutput.java:165)
at com.sun.xml.bind.v2.runtime.XMLSerializer.endDocument(XMLSerializer.java:852)
at com.sun.xml.bind.v2.runtime.MarshallerImpl.postwrite(MarshallerImpl.java:369)
at com.sun.xml.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:316)
... 3 more