Grab Headlines From A Remote RSS File

By Nicholas Chase
2003-12-19

Transforming The File

The Java bean is nothing more than a Java class that has get and set methods. In this case, the set method, setRSSFile() also includes code that performs a transformation on that file:

Listing 5. Transforming the feed

import javax.xml.transform.stream.StreamSource;

import javax.xml.transform.stream.StreamResult;

import java.io.FileOutputStream;

import javax.xml.transform.TransformerFactory;

import javax.xml.transform.Transformer;



public class RSSProcessor {



  public RSSProcessor(){ }



  String _RSSFile;

   

  public String getRSSFile(){

       return _RSSFile;

  }



  public void setRSSFile(String fileName){



       try {

            

          StreamSource source = new StreamSource(fileName);



          StreamSource finalStyle = new StreamSource("final.xsl");



          String outputURL = "headlines.html";

          StreamResult result = new StreamResult(new 

                                    FileOutputStream(outputURL));



          TransformerFactory transFactory = TransformerFactory.newInstance();

          Transformer transformer = transFactory.newTransformer(finalStyle);   

          transformer.transform(source, result);



       } catch (Exception e) {

           e.printStackTrace();        

       }

  }



   

}

This method simply takes an input source, which happens to be a remote RSS feed, and transforms it, using the final.xsl stylesheet, to the headlines.html file.

In the grand scheme of things, that's it: Retrieve the file, transform it, and display the results. In reality, there are other issues to consider.

Tutorial Pages:
» Retrieve Syndicated Content, Transform It, & Display The Result
» The Source File
» The Primary Stylesheet
» The Basic JSP Page
» Transforming The File
» Adjusting For Multiple Formats
» Choosing A Version
» Caching The Feed
» Conclusion
» Resources

First published by IBM developerWorks

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