Simple Java Xml to POJO mapping/binding?

I'm trying to figure out the simplest way to map an xml file to to a plain old java object.

Note: That in my example the xml doesn't quite match up with my intended POJO.

///////// THE XML
<?xml version="1.0" encoding="UTF-8"?>
<Animal>
  <standardName>
    <Name>Cat</Name>
  </standardName>
  <standardVersion>
    <VersionIdentifier>V02.00</VersionIdentifier>
  </standardVersion>
</Animal>


////// THE INTENDED POJO
class Animal
{
 private String name;
 private String versionIdentifier;
}

Regular JAXB (with annotations) won't work as the JAXM Element name annotations don't allow me to specifiy nested elements. (i.e. standardName/Name).

I've looked at Jibx but it seems overly complicated, and no full examples are provided for what I want to do.

Castro seems like it would be able to do what I want (using mapping files), but I wonder if there are any other possible solutions. (Possibly that would allow me to skip mapping files, and just allow me to specify everything in annotations).

Thanks

This article may help you... it only requires you to know xpath http://onjava.com/onjava/2007/09/07/schema-less-java-xml-data-binding-with-vtd-xml.html

EclipseLink JAXB (MOXy) allows you to do the path based mapping that you are looking for:

@XmlRootElement 
class Animal 
{ 
 @XmlPath("standardName/Name/text()")
 private String name; 

 @XmlPath("standardVersion/VersionIdentifier/text()");
 private String versionIdentifier; 
}

For more information see:

EclipseLink also allows the metadata to be specified using an external configuration file:

http://wiki.eclipse.org/EclipseLink/Examples/MOXy/GettingStarted/ExternalizedMetadata

Jakarta Commons Digester should do what you want.

Alternatively, I would recommend writing a transformation class that uses XPath to retrieve elements from the XML.

I consider JiBX the best of the bunch (JAXB, Castor, XMLBeans, etc.), particularly because I favor mapping files over annotations. Admittedly it has a decent learning curve, but the website has a lot of good examples. You must have missed the tutorial.

If you are only going one way (XML --> POJO) you could use Digester.

Side comment: I prefer mapping files over annotations because annotations:

clutter the code (especially when using annotations from several products)
mix concerns (XML, database, etc. in domain layer)
can only bind to a single XML (or database, or web service, etc.) representation

来源：https://stackoverflow.com/questions/1651924/simple-java-xml-to-pojo-mapping-binding

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