Spring MVC - Menghasilkan Contoh RSS Feed

Contoh berikut menunjukkan cara menghasilkan RSS Feed menggunakan Spring Web MVC Framework. Untuk memulai, mari kita memiliki IDE Eclipse yang berfungsi dan kemudian pertimbangkan langkah-langkah berikut untuk mengembangkan Aplikasi Web berbasis Formulir Dinamis menggunakan Spring Web Framework.

Langkah	Deskripsi
1	Buat proyek dengan nama TestWeb di bawah paket com.tutorialspoint seperti yang dijelaskan dalam bab Spring MVC - Hello World.
2	Buat kelas Java RSSMessage, RSSFeedViewer dan RSSController di bawah paket com.tutorialspoint.
3	Unduh pustaka Roma Rome dan dependensinya rome-utils, jdom dan slf4j dari halaman repositori maven yang sama. Taruh di CLASSPATH Anda.
4	Buat file properti messages.properties di bawah folder SRC.
5	Langkah terakhir adalah membuat konten file sumber dan konfigurasi dan mengekspor aplikasi seperti yang dijelaskan di bawah ini.

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<String, Object> 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<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 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<RSSMessage> items = new ArrayList<RSSMessage>();

      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

<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 = "com.tutorialspoint" />

   <bean class = "org.springframework.web.servlet.view.BeanNameViewResolver" />

   <bean id = "rssViewer" class = "com.tutorialspoint.RSSFeedViewer" />
</beans>

Di sini, kami telah membuat RSS feed POJO RSSMessage dan RSS Message Viewer, yang memperluas AbstractRssFeedViewdan mengganti metodenya. Di RSSController, kami telah membuat contoh RSS Feed.

Setelah Anda selesai membuat file sumber dan konfigurasi, ekspor aplikasi Anda. Klik kanan pada aplikasi Anda, gunakanExport → WAR File opsi dan simpan file TestWeb.war file di folder webapps Tomcat.

Sekarang, jalankan server Tomcat Anda dan pastikan Anda dapat mengakses halaman web lain dari folder webapps menggunakan browser standar. Coba URL -http://localhost:8080/TestWeb/rssfeed dan kita akan melihat layar berikut.