java xml annotation get field with namespace, value

Question

I\'m working on a project that has no schema and I have to parsing the xml response manually. My problem is i can\'t get some value using the xml annotation.

For exa

Answer 1

JAXB and other XML processors that are capable of processing XML Schema are going to treat everything before a : as a namespace prefix. If the colon is then you can do the following.

Java Model

You need to specify that your element name contains the : character.

import javax.xml.bind.annotation.*;

@XmlAccessorType(XmlAccessType.FIELD)
public class ResponseData {

    @XmlElement(name = "autn:numhits")
    private String numhits;

    private String totalhits;

}

Demo

import javax.xml.bind.*;
import javax.xml.parsers.*;
import org.xml.sax.XMLReader;

public class Demo {

    public static void main(String[] args) throws Exception {
        // Create a SAXParser that is not namespace aware
        SAXParserFactory spf = SAXParserFactory.newInstance();
        SAXParser sp = spf.newSAXParser();
        XMLReader xr = sp.getXMLReader();

        // Create the JAXBContext
        JAXBContext jc = JAXBContext.newInstance(AutonomyResponse.class);

        // Instead of Unmarshaller we will use an UnmarshallerHandler
        Unmarshaller unmarshaller = jc.createUnmarshaller();
        UnmarshallerHandler unmarshallerHandler = unmarshaller.getUnmarshallerHandler();

        // Do a SAX parse with the UnmarshallerHanlder as the ContentHandler
        xr.setContentHandler(unmarshallerHandler);
        xr.parse("src/forum20062536/input.xml");

        // Get the result of the unmarshal
        AutonomyResponse autonomyResponse = (AutonomyResponse) unmarshallerHandler.getResult();

        // Marshal the object back to XML
        Marshaller marshaller = jc.createMarshaller();
        marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
        marshaller.marshal(autonomyResponse, System.out);
    }

}

Answer 2

The fact is autn - is only prefix, not namespace. For correct processing of the XML document, namespace must be declared.

Right namespace declaration:

<?xml version='1.0' encoding='UTF-8' ?>
<autnresponse xmlns:autn="http://namespace.here">
    <action>QUERY</action>
    <response>SUCCESS</response>
    <responsedata>
        <autn:numhits>7</autn:numhits>
    </responsedata>
</autnresponse>

You also need to change the annotation:

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "responsedata")
public class ResponseData {
    @XmlElement(name = "numhits",namespace = "http://namespace.here")
    private String numhits;
    @XmlElement(name = "totalhits")
    private String totalhits;
}

And finnaly advice for you. If you have a xsd scheme for this xml document, use the XJC utilit for java code generation.

http://docs.oracle.com/javaee/5/tutorial/doc/bnbah.html