spring使用rssfeed

import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.servlet.ModelAndView;import mypackage.rss.view.RssFeedView;/** * 栏目稿件RSS订阅请求控制器类。 * */@Controller@RequestMapping({
    "/rss/c/{columnId}"})public class ColumnStoriesRssController {    @RequestMapping("")    public ModelAndView feed() {        ModelAndView modelAndView = new ModelAndView();        // TODO 从本地缓存获取稿件数据        modelAndView.addObject(RssFeedView.ITEMS_KEY, null);        modelAndView.setView(new RssFeedView());        return modelAndView;    }}

 RSS Feed 视图类

import java.util.ArrayList;import java.util.Arrays;import java.util.List;import java.util.Map;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.jdom2.Element;import org.springframework.web.servlet.view.feed.AbstractRssFeedView;import mypackage.domain.model.NrCompoStory;import mypackage.domain.model.NrGalleryStory;import mypackage.domain.model.NrStory;import mypackage.domain.model.NrVideoStory;import mypackage.framework.infras.exception.UnexpectedException;import com.rometools.rome.feed.rss.Channel;import com.rometools.rome.feed.rss.Item;/** * RSS Feed 视图类。 * */public class RssFeedView extends AbstractRssFeedView {    /**     * RSS稿件列表KEY     */    public static final String ITEMS_KEY = "RSS_ITEMS";    /**     * {
    @inheritDoc}     */    @Override    protected Channel newFeed() {        Channel channel = new Channel("rss_2.0");        channel.setTitle("${title}");        channel.setLink("${link}");        channel.setEncoding("UTF-8");        channel.setDescription("${description}");        return channel;    }    /**     * {
    @inheritDoc}     */    @Override    protected List
     
       buildFeedItems(Map
      
        model,            HttpServletRequest request, HttpServletResponse response)            throws Exception {        @SuppressWarnings("unchecked")        List
       
         stories = (List
        
         )model.get(ITEMS_KEY);        List
         
           result = new ArrayList
          
           (); if (stories != null) { for (NrStory story : stories) { result.add(createItem(story)); } } return result; } /** * 通过稿件创建RSS Item * * @param story 稿件 * @return RSS Item */ private Item createItem(NrStory story) { Item result = null; if (story instanceof NrCompoStory) { result = createCompoItem((NrCompoStory)story); } else if (story instanceof NrGalleryStory) { result = createGalleryItem((NrGalleryStory)story); } else if (story instanceof NrVideoStory) { result = createVideoItem((NrVideoStory)story); } else { throw new UnexpectedException("unknow story type.(" + story.getClass().getName() + ")"); } return result; } /** * 通过图文稿件创建RSS Item * * @param story 稿件 * @return RSS Item */ private Item createCompoItem(NrCompoStory story) { Item result = new Item(); result.setTitle(""); result.setLink(""); result.setDescription(null); result.setPubDate(null); Element element = null;// 
           
            // 
            
             // (see detail in next page)// 
            // …...// 
            result.setForeignMarkup(Arrays.asList(element)); return result; } /** * 通过图集稿件创建RSS Item * * @param story 稿件 * @return RSS Item */ private Item createGalleryItem(NrGalleryStory story) { return null; } /** * 通过视频稿件创建RSS Item * * @param story 稿件 * @return RSS Item */ private Item createVideoItem(NrVideoStory story) { return null; }}