How can I covert a an xml file to a simple java bean? Its a simple xml file without any xsd, which was generated from a java bean, which I don't have access to.
I tried using xmlbeans to first generate the xmd from xml and then to generate classes from the xsd. I got a bunch of classes. I am looking for a single java bean class.
JAXB
JAXB (JSR-222) provides an easy way to convert objects to XML. There are many open source implementations of this standard including:
JAXB has a default mapping for Java objects to XML. This mapping can be customized through the application of annotations.
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.Element;
@XmlRootElement
public class Address {
private String street;
private String city;
private String state;
private String country;
@XmlElement(name="postal-code")
private String postalCode;
}
Would correspond to the following XML:
<address>
<street>123 A Street</street>
<city>Any Town</city>
<state>A State</state>
<postal-code>12345</postal-code>
</address>
EclipseLink JAXB (MOXy)
MOXy has an XPath based mapping extension. This means we can take our same Address class and map it to Google's geocode format:
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;
import org.eclipse.persistence.oxm.annotations.XmlPath;
@XmlRootElement(name="kml")
@XmlType(propOrder={"country", "state", "city", "street", "postalCode"})
public class Address {
@XmlPath("Response/Placemark/ns:AddressDetails/ns:Country/ns:AdministrativeArea/ns:SubAdministrativeArea/ns:Locality/ns:Thoroughfare/ns:ThoroughfareName/text()")
private String street;
@XmlPath("Response/Placemark/ns:AddressDetails/ns:Country/ns:AdministrativeArea/ns:SubAdministrativeArea/ns:Locality/ns:LocalityName/text()")
private String city;
@XmlPath("Response/Placemark/ns:AddressDetails/ns:Country/ns:AdministrativeArea/ns:AdministrativeAreaName/text()")
private String state;
@XmlPath("Response/Placemark/ns:AddressDetails/ns:Country/ns:CountryNameCode/text()")
private String country;
@XmlPath("Response/Placemark/ns:AddressDetails/ns:Country/ns:AdministrativeArea/ns:SubAdministrativeArea/ns:Locality/ns:PostalCode/ns:PostalCodeNumber/text()")
private String postalCode;
}
The above class corresponds to the following XML:
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://earth.google.com/kml/2.0" xmlns:ns="urn:oasis:names:tc:ciq:xsdschema:xAL:2.0">
<Response>
<Placemark>
<ns:AddressDetails>
<ns:Country>
<ns:CountryNameCode>US</ns:CountryNameCode>
<ns:AdministrativeArea>
<ns:AdministrativeAreaName>CA</ns:AdministrativeAreaName>
<ns:SubAdministrativeArea>
<ns:Locality>
<ns:LocalityName>Mountain View</ns:LocalityName>
<ns:Thoroughfare>
<ns:ThoroughfareName>1600 Amphitheatre Pkwy</ns:ThoroughfareName>
</ns:Thoroughfare>
<ns:PostalCode>
<ns:PostalCodeNumber>94043</ns:PostalCodeNumber>
</ns:PostalCode>
</ns:Locality>
</ns:SubAdministrativeArea>
</ns:AdministrativeArea>
</ns:Country>
</ns:AddressDetails>
</Placemark>
</Response>
</kml>
For more Information
Try Castor Mapping.
