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javaxmljaxbunmarshalling

How to resolve the error 'nexpected element (uri:"", local:"Create"). Expected elements are <{}Create>'?

I have a problem with my JAXB:

<element name="create">
    <complexType>
        <sequence>
            <element name="name" type="string"></element>
        </sequence>
    </complexType>
</element>

My XML:

<Create>
<name> coco </name>
</Create>

My Java:

JAXBContext context = JAXBContext.newInstance("MyPackage");
 Unmarshaller decodeur =    context.createUnmarshaller();
System.out.println("text : " + message);
msgObject = decodeur.unmarshal(sr);  
     if (msgObject instanceof Create)

{
      System.out.println(" action");
}

And I have this:

unexpected element (uri:"", local:"Create"). Expected elements are <{http://www.example.org/XSD_Maths}create>

And my code stopped at this line:

 msgObject = decodeur.unmarshal(sr);

Is my XML OK or is there a problem with it? I'm not sure why I'm getting this error.

Solution

  • Your XML Schema probably has a schema tag like the following.

    <?xml version="1.0" encoding="UTF-8"?>
<schema 
    xmlns="http://www.w3.org/2001/XMLSchema" 
    targetNamespace="http://www.example.org/XSD_Maths" 
    xmlns:tns="http://www.example.org/XSD_Maths" 
    elementFormDefault="qualified">

    Since it specifies a targetNamespace of http://www.example.org/XSD_Maths. Your XML will need to look like the following:

    <create xmlns="http://www.example.org/XSD_Maths">
    <name> coco </name>
</create>

    Note About Unmarshalling from a DOM

    If you unmarshalling from a DOM Document or Element make sure that the DOM parser you used was namespace aware. This is done by setting the following flag on the DocumentBuilderFactory.

    documentBuilderFactory.setNamespaceAware(true);

    For More Information

    Below is a link to an article on my blog where I go into more depth about JAXB and namespaces.