用spring，rome实现rss,atom

 

spring 3 里面新增加了下面两个类，用来方便的实现rss和atom 
org.springframework.web.servlet.view.feed.AbstractRssFeedView 
org.springframework.web.servlet.view.feed.AbstractAtomFeedView 

下面演示用spring 3实现rss,除了加入spring 3的web.servlet包外，还要加入rome-1.0.jar和jdom.jar 

在spring配置文件中加入 
Xml代码 
<bean class="org.springframework.web.servlet.view.BeanNameViewResolver"/>  


用于显示数据的Item 
Java代码 
public class RssItem {  
    private String title;  
    private String author;  
    private Date datePublished;  
    private String description;  
    private String link;  
}  


用spring mvc 来处理一个地址请求 
Java代码 
@Controller  
public class FeedController {  
      
    @RequestMapping("/rss")  
    public String rss(Model model) {  
  
        List<RssItem> rssItems = new ArrayList<RssItem>();  
  
        RssItem n = new RssItem();  
        n.setTitle("中国内地发现8例甲流病毒变异病例");  
        n.setDescription("世卫组织证实内地曾出现甲流病毒变种...");  
        n.setLink("http://news.163.com/09/1125/17/5OVTJVQF000120GU.html");  
        n.setAuthor("新华网");  
        n.setDatePublished(new Date());   
  
        rssItems.add(n);  
  
//加入一个Demo的list数据  
        model.addAttribute("rssItemList", rssItems);  
          
 //频道的相关信息  
        model.addAttribute("feedTitle","网易头条新闻");  
        model.addAttribute("feedDesc","头条新闻");  
        model.addAttribute("feedLink","http://news.163.com/");  
          
        return "rssView";  
    }  
  
}  


继承AbstractRssFeedView类，实现buildFeedMetadata，buildFeedItems方法 
Java代码 
@Component("rssView")  
public class RssView extends AbstractRssFeedView {  
  
    @Override  
    protected void buildFeedMetadata(Map<String,Object> model, Channel feed,  
            HttpServletRequest request) {  
          
        String feedTitle = (String)model.get("feedTitle");  
        String feedDesc = (String)model.get("feedDesc");  
        String feedLink = (String)model.get("feedLink");  
          
        feed.setTitle(feedTitle);  
        feed.setDescription(feedDesc);  
        feed.setLink(feedLink);  
    }  
  
    @Override  
    protected List<Item> buildFeedItems(Map<String, Object> model,  
            HttpServletRequest request, HttpServletResponse response)  
            throws Exception {  
  
        @SuppressWarnings("unchecked")  
        List<RssItem> rssItems = (List<RssItem>) model.get("rssItemList");  
  
        List<Item> feedItems = new ArrayList<Item>();  
        for (RssItem rssItem : rssItems) {  
            Item feedItem = new Item();  
            feedItem.setTitle(rssItem.getTitle());  
            feedItem.setAuthor(rssItem.getAuthor());  
            feedItem.setPubDate(rssItem.getDatePublished());  
  
            Description desc = new Description();  
            desc.setType("text/html");  
            desc.setValue(rssItem.getDescription());  
            feedItem.setDescription(desc);  
  
            feedItem.setLink(rssItem.getLink());  
            feedItems.add(feedItem);  
        }  
  
        return feedItems;  
    }  
}