Java 如何使用Jackson解析xmlElements？

如何使用Jackson解析xmlElements？ 例如，我的xml是：

<channel>
  <title>Title</title>
  <link>http://example.com</link>
   <item>
     <category>Categ</category>
     <guid>http://1294796429.html</guid>
     <rian:priority xmlns:rian="http://example.com">3</rian:priority>
   </item>
   ...
   <item>... </item>
   ...
</channel>

---

但它不起作用。错误是

无法将字符串保存到项
只需创建类

@JacksonXmlRootElement(localName = "channel")
public class Channel

{
    private String title;
    private String link;
    public Channel(){
    }
    @JacksonXmlProperty(localName = "item")
    @JacksonXmlElementWrapper(useWrapping = false)
    public List<Item> items;
    //----getters...settters
 }

}

跑

只需要创建一个类

@JacksonXmlRootElement(localName = "channel")
public class Channel

{
    private String title;
    private String link;
    public Channel(){
    }
    @JacksonXmlProperty(localName = "item")
    @JacksonXmlElementWrapper(useWrapping = false)
    public List<Item> items;
    //----getters...settters
 }

}

跑

@JacksonXmlRootElement(localName = "channel")
public class Channel

{
    private String title;
    private String link;
    public Channel(){
    }
    @JacksonXmlProperty(localName = "item")
    @JacksonXmlElementWrapper(useWrapping = false)
    public List<Item> items;
    //----getters...settters
 }

public  class Item {
    private String guid;
    private String category;
    public Item(){

    }

JacksonXmlModule module = new JacksonXmlModule();
        module.setDefaultUseWrapper(false);
        XmlMapper xmlMapper = new XmlMapper(module);
        xmlMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);

        Channel mChannel = xmlMapper.readValue(in, Channel.class);
        Log.e(LOG_TAG, "getItemsSize: " + mChannel.getItems().size());