JAXB Java generating XML, Why lowercase?

For specific elements...

@XmlElement( name = "Code")
private String code;

For the object....

@XmlRootElement(name="Employee")
public class Employee{ ...

The behaviour you are seeing is the result of the standard JAXB (JSR-222) XML name to Java name conversion algorithm.

You can use the @XmlRootElement annotation to specify a name:

@XmlRootElement(name="Employee")
@XmlAccessorType(XmlAccessType.FIELD)
class Employee {
    ...
}

I'm the EclipseLink JAXB (MOXy) lead, and we have an extension that allows you to override the default name conversion algorithm that you may be interested in:

• http://blog.bdoughan.com/2011/05/overriding-jaxbs-name-mangling.html