Question

我的webservice一直报这个错javax.xml.ws.WebServiceException: javax.xml.bind.MarshalException

[javax.xml.bind.JAXBException: A DOM document "class com.sun.org.apache.xerces.internal.dom.DeferredDocumentImpl" is found but an element is needed. Use Document.getDocumentElement() and set that object instead.]
at com.sun.xml.ws.message.jaxb.JAXBMessage.writePayloadTo(JAXBMessage.java:322)
at com.sun.xml.ws.message.AbstractMessageImpl.writeTo(AbstractMessageImpl.java:142)
at com.sun.xml.ws.encoding.StreamSOAPCodec.encode(StreamSOAPCodec.java:108)
at com.sun.xml.ws.encoding.SOAPBindingCodec.encode(SOAPBindingCodec.java:258)
at com.sun.xml.ws.transport.http.client.HttpTransportPipe.process(HttpTransportPipe.java:142)
at com.sun.xml.xwss.XWSSClientPipe.process(XWSSClientPipe.java:118)
at com.sun.xml.ws.api.pipe.helper.PipeAdapter.processRequest(PipeAdapter.java:115)

代码如下:我读取了一个xml文件后调用这个webservice

Answer 1

你的代码错误地方没贴出来，这里的语句没有问题除了要判断if(nodes!=null).

A MarshalException is thrown if a
java.io.IOException occurs while marshalling the remote call
header, arguments or return value for a remote method call. A
MarshalException is also thrown if the receiver does not
support the protocol version of the sender.
If a MarshalException occurs during a remote method call,
the call may or may not have reached the server. If the call did reach the
server, parameters may have been deserialized. A call may not be
retransmitted after a MarshalException and reliably preserve
"at most once" call semantics.

检测你的webservice配置才对

Answer 2

这样的目的是避免空指针异常

Answer 3

赋得古原草送别(白居易) 离离原上草，