如何使用JAXB实例化一个空元素

   <groupId>javax.xml.bind</groupId>
   <artifactId>jaxb-api</artifactId>
   <version>2.3.1</version>
</dependency>

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class EmptyElement {
}

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;

public class JAXBDemo {
    public static void main(String[] args) {
        try {
            JAXBContext jaxbContext = JAXBContext.newInstance(EmptyElement.class);
        } catch (JAXBException e) {
            e.printStackTrace();
        }
    }
}

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;

public class JAXBDemo {
    public static void main(String[] args) {
        try {
            JAXBContext jaxbContext = JAXBContext.newInstance(EmptyElement.class);

            EmptyElement emptyElement = new EmptyElement();

            Marshaller marshaller = jaxbContext.createMarshaller();
            marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
            marshaller.marshal(emptyElement, System.out);
        } catch (JAXBException e) {
            e.printStackTrace();
        }
    }
}

<?xml version="1.0" encoding="UTF-8" standalone="yes"?><emptyElement/>