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📜  Spring MVC-生成RSS Feed示例

📅  最后修改于: 2020-11-11 06:35:10             🧑  作者: Mango

以下示例显示了如何使用Spring Web MVC Framework生成RSS Feed。首先，让我们拥有一个运行良好的Eclipse IDE，然后考虑以下步骤，以使用Spring Web Framework开发基于动态表单的Web应用程序。

Step Description
1 Create a project with the name TestWeb under a package com.tutorialspoint as explained in the Spring MVC – Hello World chapter.
2 Create Java classes RSSMessage, RSSFeedViewer and RSSController under the com.tutorialspoint package.
3 Download the Rome library Rome and its dependencies rome-utils, jdom and slf4j from the same maven repository page. Put them in your CLASSPATH.
4 Create a properties file messages.properties under the SRC folder.
5 The final step is to create the content of the source and configuration files and export the application as explained below.

RSSMessage.java

package com.tutorialspoint;

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 com.tutorialspoint;

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 model, Channel feed,
      HttpServletRequest request) {

      feed.setTitle("TutorialsPoint Dot Com");
      feed.setDescription("Java Tutorials and Examples");
      feed.setLink("http://www.tutorialspoint.com");

      super.buildFeedMetadata(model, feed, request);
   }

   @Override
   protected List buildFeedItems(Map model,
      HttpServletRequest request, HttpServletResponse response) throws Exception {
   
      List listContent = (List) model.get("feedContent");
      List items = new ArrayList(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 com.tutorialspoint;

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 items = new ArrayList();

      RSSMessage content  = new RSSMessage();
      content.setTitle("Spring Tutorial");
      content.setUrl("http://www.tutorialspoint/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.tutorialspoint/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

在这里，我们创建了一个RSS feed POJO RSSMessage和一个RSS Message Viewer，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“导出”→“ WAR文件”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，并确保您能够使用标准浏览器从webapps文件夹访问其他网页。尝试使用URL- http：// localhost：8080 / TestWeb / rssfeed ，我们将看到以下屏幕。

春季RSS生成