如何在Java SimpleXML中序列化无节点封闭标签

import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;

@Root(name = "person")
public class Person {
    @Element(name = "name", required = false)
    private String name;

    public Person(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }
}

import org.simpleframework.xml.Serializer;
import org.simpleframework.xml.core.Persister;

public class SerializationExample {
    public static void main(String[] args) throws Exception {
        Person person = new Person("John Doe");

        Serializer serializer = new Persister();
        String xml = serializer.write(person);

        System.out.println(xml);
    }
}

<person>
   <name>John Doe</name>
</person>

import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;

@Root(name = "person")
public class Person {
    @Element(name = "name", required = false, empty = true)
    private String name;

    public Person(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }
}

<person>
   <name/>
</person>