我正在尝试使用MOXyJAXB来序列化类A，它看起来像:@XmlAccessorType(XmlAccessType.NONE)@XmlRootElementpublicclassA{privateMapfooBar=newHashMap();privateSetfoos=newHashSet();@XmlJavaTypeAdapter(FooBarMapAdapter.class)publicMapgetFooBar(){returnfooBar;}publicvoidsetFooBar(MapfooBar){this.fooBar=fooBar;}@XmlElementpublic