如何使用JAX-WS/JAXB处理参数化类型?

考虑下面的类(请假设私有字段的公共吸气剂和SETTER方法)。

// contains a bunch of properties
public abstract class Person { private String name; }

// adds some properties specific to teachers
public class Teacher extends Person { private int salary; }

// adds some properties specific to students
public class Student extends Person { private String course; }

// adds some properties that apply to an entire group of people
public class Result<T extends Person> {
   private List<T> group;

   private String city;
   // ...
}

@WebService
public class PersonService {

    @WebMethod
    public Result<Teacher> getTeachers() { ... }

    @WebMethod
    public Result<Student> getStudents() { ... }
}

问题在于,JAXB似乎将结果对象作为 Result<Person> 而不是混凝土类型。因此,getTeachers()返回的结果被序列化为包含 List<Person> 而不是 List<Teacher> ,getStudents()也一样,但需作必要的修改。

这是预期的行为吗?我是否需要在Person上使用@xmlsee?

谢谢