我正在尝试Unofficial JAXB Guide - Mapping interfaces — Project Kenai第3.2.1节中显示的JAXB接口的简单示例,但它不适合我。我在最新的JDK 1.8_70中没有使用任何特殊的库。完整代码:
@XmlRootElement
class Zoo {
@XmlAnyElement
public List<Animal> animals;
}
interface Animal {
void sleep();
void eat();
...
}
@XmlRootElement
class Dog implements Animal { ... }
@XmlRootElement
class Lion implements Animal { ... }
对此有何帮助?我得到的错误是:
[com.sun.istack.internal.SAXException2: class testjaxb.Cat nor any of its super class is known to this context.
javax.xml.bind.JAXBException: class testjaxb.Cat nor any of its super class is known to this context.]
编辑:发布JAXBContext.newInstance代码:
Zoo zoo = new Zoo();
zoo.animals = new ArrayList<Animal>();
zoo.animals.add( new Cat() );
zoo.animals.add( new Dog() );
zoo.animals.add( new Dog() );
JAXBContext ctx = JAXBContext.newInstance(Zoo.class);
Marshaller marshaller = ctx.createMarshaller();
marshaller.marshal(zoo, System.out);
答案 0 :(得分:4)
尝试在您提供给JAXBContext.newInstance()
的列表中指定其他类。
JAXBContext ctx = JAXBContext.newInstance(Zoo.class, Cat.class, Dog.class);
将@XmlSeeAlso
注释应用于Zoo
课程也应该有效。
@XmlRootElement
@XmlSeeAlso({Cat.class, Dog.class})
class Zoo {
...
}