“无法为传递的源创建Stax阅读器”错误

Question

我有以下代码：

public Object unmarshal(Source source, MimeContainer mimeContainer) throws XmlMappingException {
    AttachmentUnmarshaller au = null;
    if (this.mtomEnabled && mimeContainer != null) {
        au = new MISMarshaller.MISAttachmentUnmarshaller(mimeContainer);
    }

    if (source instanceof SAXSource && ((SAXSource)source).getXMLReader() != null) {
        try {
            XMLInputFactory factory = XMLInputFactory.newInstance();
            return this.context.unmarshal(au, factory.createXMLStreamReader(source));
        } catch (Exception var5) {
            throw new UnmarshallingFailureException(var5.getMessage(), var5);
        }
    } else {
        throw new IllegalStateException("Only StAX is supported for MIS marshaller.  Use AXIOM message factory.");
    }
}

在此行，我得到一个例外：

            return this.context.unmarshal(au, factory.createXMLStreamReader(source));

这里是例外：

javax.xml.stream.XMLStreamException：无法为创建Stax阅读器传递的源-阅读器，输入流或系统ID都不是无障碍;不能使用其他类型的源（例如嵌入式SAX流）

在运行时，source是StaxSource的实例。

是否有解决此问题的方法？

Answer 1

从Spring 3.0开始，您可以使用StaxUtils(org.springframework.util.xml.StaxUtils)类，而直接使用不推荐使用的StaxResult类。我找到了一些示例，您可以对marshal方法执行以下操作：

public void marshal(Object graph, Result result, MimeContainer mimeContainer) throws XmlMappingException {
    try {
        AttachmentMarshaller am = null;
        if (this.mtomEnabled && mimeContainer != null) {
            am = new MISMarshaller.MISAttachmentMarshaller(mimeContainer);
        }
        if (StaxUtils.isStaxResult(result) && StaxUtils.getXMLStreamWriter(result) != null) {
            this.context.marshal(graph, am, StaxUtils.getXMLStreamWriter(result));
        } else {
            if (!(result instanceof SAXResult) || ((SAXResult)result).getHandler() == null) {
                throw new IllegalStateException("Only StAX or SAX is supported for MIS marshaller.  Use AXIOM message factory.");
            }
            this.context.marshal(graph, am, (SAXResult)result);
        }
    } catch (Exception var5) {
        throw new MarshallingFailureException(var5.getMessage(), var5);
    }
}

与以前的旧方法相反：

public void marshal(Object graph, Result result, MimeContainer mimeContainer) throws XmlMappingException {
    try {
        AttachmentMarshaller am = null;
        if (this.mtomEnabled && mimeContainer != null) {
            am = new MISMarshaller.MISAttachmentMarshaller(mimeContainer);
        }
        if (result instanceof StaxResult && ((StaxResult)result).getXMLStreamWriter() != null) {
            this.context.marshal(graph, am, ((StaxResult)result).getXMLStreamWriter());
        } else {
            if (!(result instanceof SAXResult) || ((SAXResult)result).getHandler() == null) {
                throw new IllegalStateException("Only StAX or SAX is supported for MIS marshaller.  Use AXIOM message factory.");
            }
            this.context.marshal(graph, am, (SAXResult)result);
        }
    } catch (Exception var5) {
        throw new MarshallingFailureException(var5.getMessage(), var5);
    }
}