Component Code : 
<aura:component implements="force:appHostable,flexipage:availableForAllPageTypes,flexipage:availableForRecordHome,force:hasRecordId" 
                access="global" controller="JSONParserUtil">
    <aura:attribute name="feeds" type="feed[]"/>	 
    <aura:handler name="init" value="{!this}" action="{!c.getfeed}"/>
	<header align="center">
        <h1 class="slds-text-heading--large"  style="color:blue;text-align:center;border-bottom:3px solid blue" ><li>News</li></h1><br/>
    </header>
    
    <table class="slds-table slds-table--bordered slds-table--fixed-layout slds-scrollable--y" role="grid">	       
    <thead>
        <tr class="slds-text-heading--label ">        
                <th style="width:100px;" class="slds-is-sortable slds-is-resizable slds-text-title--caps slds-has-focus" scope="col" >
                  <a href="javascript:void(0);" class="slds-th__action slds-text-link--reset" tabindex="0">
                      <span class="slds-assistive-text">Sort </span>
                      <span class="slds-truncate" title="Title">Title</span>
                      <div class="slds-icon_container">
                      </div>
                      <span class="slds-assistive-text" aria-live="assertive" aria-atomic="true"></span>
                     </a>
                    <div class="slds-resizable">
                      <label for="cell-resize-handle-553" class="slds-assistive-text">Name column width</label>
                      <input type="range" min="20" max="1000" class="slds-resizable__input slds-assistive-text" id="cell-resize-handle-553" tabindex="0" />
                      <span class="slds-resizable__handle">
                        <span class="slds-resizable__divider"></span>
                      </span>
                    </div>
                   </th>	 	 	 
          </tr>  
    </thead>
    </table>
    <tbody>    
      <aura:iteration items="{!V.feeds}" var="art">
          <tr class="slds-hint-parent">				
				<td role="gridcell">
                     <div class="slds-truncate" title="Task Owner Name">{!art.title}</div>
               </td>
         </tr>                
     </aura:iteration>		 
    </tbody>    
</aura:component>


Controller :
({
getfeed : function(component,event, helper) 
        {
        helper.getfeed(component);
    	}
})


Helper : 

({
  getfeed : function(component) 
    {
        var action = component.get("c.getRSSData");
        
            if (a.getState() === "SUCCESS") {
            component.set("v.feeds", a.getReturnValue());
            } else if (a.getState() === "ERROR") {
            $A.log("callback error", a.getError());
    }   
	}
})

Controller in classic : 

public class RSS {
    public class channel {
       public list<RSS.item> items {get;set;}
        public channel() {
            items = new list<RSS.item>();
        }
    }
    public class item {
        public String title {get;set;}
        public String link {get;set;}
        public String pubDate {get;set;}
        public String getUrl() {
            String result = (link != null) ? link.substringAfterLast('url=') : null;
            return result;
        }
        public DateTime getPublishedDateTime() {
            DateTime result = (pubDate != null) ? DateTime.valueOf(pubDate.replace('T', ' ').replace('Z','')) : null;
            return result;
        }
    }
    public static RSS.channel getRSSData(string feedURL) 
	{
        HttpRequest req = new HttpRequest();
        req.setEndpoint(feedURL);
        req.setMethod('GET');
        Dom.Document doc = new Dom.Document();
        Http h = new Http();
        HttpResponse res = h.send(req);
        doc = res.getBodyDocument();
        Dom.XMLNode rss = doc.getRootElement();
		
		
        //first child element of rss feed is always channel
        Dom.XMLNode channel = rss.getChildElements()[0];
        RSS.channel result = new RSS.channel();
        list<RSS.item> rssItems = new list<RSS.item>();
       for(Dom.XMLNode elements : channel.getChildElements()) {
        if('item' == elements.getName()) {
                RSS.item rssItem = new RSS.item();
				
				
                //for each node inside item
                for(Dom.XMLNode xmlItem : elements.getChildElements()) {
                    if('title' == xmlItem.getName()) {
                        rssItem.title = xmlItem.getText();
                    }
                    if('link' == xmlItem.getName()) {
                        rssItem.link = xmlItem.getText();
                    }
                   if('pubDate' == xmlItem.getName()) {
                        rssItem.pubDate = xmlItem.getText();
                    }
                }
				
				
                //for each item, add to rssItem list
                rssItems.add(rssItem);
            }
          }
            //finish RSS.channel object by adding the list of all rss items
        result.items = rssItems;
        return result;
    }
        
}