将不同属性类型解组到同一java对象时出现NullPointerException

Question

<EnumType Name="Genre" UnderlyingType="Edm.Int32">
   <Member Name="ACTION" Value="0"/>
   <Member Name="COMEDY" Value="1"/>
</EnumType>
<EnumType Name="Rating" UnderlyingType="Edm.String">
   <Member Name="RatingA" Value="G"/>
   <Member Name="RatingB" Value="PG"/>
 </EnumType>

@XmlRootElement
public class EnumType {

   @XmlElement(name = "Member", namespace = "http://schemas.microsoft.com/ado/2009/11/edm")
   private List<Member> members = new LinkedList<Member>();

   public List<Member> getMembers() {
      return members;
   }
}

@XmlRootElement
public class Member {

    @XmlAttribute(name = "Name")
    private String name;

    @XmlAttribute(name = "Value")
    private Object value;

    public String getName() {
        return name;
    }

    public Object getValue() {
        return value;
    }
}

有什么想法吗？：（

Answer 1

当您使用@XmlAttribute注释Object类型的字段/属性时，JAXB RI将抛出该异常。与member类中的相同：

@XmlAttribute(name = "Value")
private Object value;

有关更多信息

• 对象类型抛出空指针异常的JAXB属性？