Generate RSS Feed

以下示例说明如何使用Spring Web MVC Framework生成RSS Feed。 首先，让我们使用一个可用的Eclipse IDE，然后考虑以下步骤，使用Spring Web Framework开发基于动态表单的Web应用程序。

RSSMessage.java

package cn.xnip;
import java.util.Date;
public class RSSMessage {
   String title;
   String url;
   String summary;
   Date createdDate;
   public String getTitle() {
      return title;
   }
   public void setTitle(String title) {
      this.title = title;
   }
   public String getUrl() {
      return url;
   }
   public void setUrl(String url) {
      this.url = url;
   }
   public String getSummary() {
      return summary;
   }
   public void setSummary(String summary) {
      this.summary = summary;
   }
   public Date getCreatedDate() {
      return createdDate;
   }
   public void setCreatedDate(Date createdDate) {
      this.createdDate = createdDate;
   }	
}

RSSFeedViewer.java

package cn.xnip;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.view.feed.AbstractRssFeedView;
import com.rometools.rome.feed.rss.Channel;
import com.rometools.rome.feed.rss.Content;
import com.rometools.rome.feed.rss.Item;
public class RSSFeedViewer extends AbstractRssFeedView {
   @Override
   protected void buildFeedMetadata(Map<String, Object> model, Channel feed,
      HttpServletRequest request) {
      feed.setTitle("xnip Dot Com");
      feed.setDescription("Java Tutorials and Examples");
      feed.setLink("http://www.xnip.cn");
      super.buildFeedMetadata(model, feed, request);
   }
   @Override
   protected List<Item> buildFeedItems(Map<String, Object> model,
      HttpServletRequest request, HttpServletResponse response) throws Exception {
      List<RSSMessage> listContent = (List<RSSMessage>) model.get("feedContent");
      List<Item> items = new ArrayList<Item>(listContent.size());
      for(RSSMessage tempContent : listContent ){
         Item item = new Item();
         Content content = new Content();
         content.setValue(tempContent.getSummary());
         item.setContent(content);
         item.setTitle(tempContent.getTitle());
         item.setLink(tempContent.getUrl());
         item.setPubDate(tempContent.getCreatedDate());
         items.add(item);
      }
      return items;		
   }
}

RSSController.java

package cn.xnip;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
@Controller
public class RSSController {
   @RequestMapping(value="/rssfeed", method = RequestMethod.GET)
   public ModelAndView getFeedInRss() {
      List<RSSMessage> items = new ArrayList<RSSMessage>();
      RSSMessage content  = new RSSMessage();
      content.setTitle("Spring Tutorial");
      content.setUrl("http://www.xnip/spring");
      content.setSummary("Spring tutorial summary...");
      content.setCreatedDate(new Date());
      items.add(content);
      RSSMessage content2  = new RSSMessage();
      content2.setTitle("Spring MVC");
      content2.setUrl("http://www.xnip/springmvc");
      content2.setSummary("Spring MVC tutorial summary...");
      content2.setCreatedDate(new Date());
      items.add(content2);
      ModelAndView mav = new ModelAndView();
      mav.setViewName("rssViewer");
      mav.addObject("feedContent", items);
      return mav;
   }
}

TestWeb-servlet.xml

<beans xmlns = "http://www.springframework.org/schema/beans"
   xmlns:context = "http://www.springframework.org/schema/context"   
   xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation = "
   http://www.springframework.org/schema/beans     
   http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
   http://www.springframework.org/schema/context 
   http://www.springframework.org/schema/context/spring-context-3.0.xsd">
   <context:component-scan base-package = "cn.xnip" />
   <bean class = "org.springframework.web.servlet.view.BeanNameViewResolver" />
   <bean id = "rssViewer" class = "cn.xnip.RSSFeedViewer" />
</beans>

在这里，我们创建了一个RSS提要POJO RSSMessage和一个RSS消息查看器，它扩展了AbstractRssFeedView并覆盖了它的方法。 在RSSController中，我们生成了一个示例RSS Feed。

完成创建源文件和配置文件后，导出应用程序。 右键单击您的应用程序，使用Export → WAR File选项并将TestWeb.war文件保存在Tomcat的webapps文件夹中。

现在，启动Tomcat服务器并确保您可以使用标准浏览器从webapps文件夹访问其他网页。 尝试一个URL - http://localhost:8080/TestWeb/rssfeed ，我们将看到以下屏幕。