JAXB添加额外的静态根元素

I have the following POJO:

我有以下POJO:

@XmlRootElement(name="SessionStartInput")
public class SessionStartInput {

    @XmlElement(name = "Header", required = true, nillable = true)
    protected SessionStartInputHeader header;
    @XmlElement(name = "Parameters", required = true, nillable = true)
    protected SessionStartInputParameters parameters;
  ...
}
@XmlRo