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OPML to HMTL using Informa

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Vinny Carpenter

Posts: 276
Nickname: vscarpente
Registered: Feb, 2003

Vinny is a Java developer/architect working with Java, J2EE, OO, Linux, OpenSource.

OPML to HMTL using Informa

Posted: May 30, 2004 9:41 PM

This post originated from an RSS feed registered with Java Buzz by Vinny Carpenter.

Original Post: OPML to HMTL using Informa
Feed Title: Vinny Carpenter's Blog
Feed URL: http://www.j2eegeek.com/error.html
Feed Description: Welcome to my blog. I am a total Java geek that lives in Milwaukee, making my living as an architect/developer, spending all my time with Java, J2EE, OO, Linux, and open source. In my spare time, when I am not in front of my computers, I spend every other minute with my other loves: My wife, books, music, guitars, Formula-1 racing and StarGate. Check out my blog @ http://www.j2eegeek.com/blog

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I've been having a few email discussions with a few of the blog readers about how I manage my blogroll and I decided to blog about it. Before I went out and purchased a copy of FeedDemon, a great RSS/ATOM feed reader, I had written my own crude feed reader. My feed reader used Informa for feed consumption and parsing and used a local MySQL database to keep track of my feeds subscription. Upon startup, the simple web application would load a list of my subscribed feeds from the database, parse them using Informa and save them locally. Worked well enough and let me learn more about Informa, which is really a very good RSS library for Java.

Now that I use FeedDemon, I output the blogs I read as an OPML file and then use Informa to create my HTML blogroll. Here's a little code snippet on how I use Informa's OPML support to parse my OPML file and iterate through the file to create the HTML that's included in my blog. I also stole Don Park's imageless RSS feed icon CSS to format my blogroll. Thanks Don - Great idea.

StringBuffer sb = new StringBuffer(); 
try { 
    Collection feeds = OPMLParser.parse("file:///C:/projects/opml2html/data/blogs.opml"); 
    sb.append("<ul class=\"navlist\">"); 
 
    Iterator it = feeds.iterator(); 
    while (it.hasNext()) { 
        FeedIF feed = (FeedIF) it.next(); 
        sb.append("<li><a href=\""); 
        sb.append(feed.getSite().toExternalForm()); 
        sb.append("\">"); 
        sb.append(feed.getTitle()); 
        sb.append("</a>  <a href=\""); 
        sb.append(feed.getLocation().toExternalForm()); 
        sb.append("\" class=\"feedIconStyle\">XML</A>\n"); 
    } 
} catch (IOException e) {

Informa is a great collaboration by the authors of HotSheet and Risotto, two independent Java/RSS efforts out in the market. If you have a need to parse RSS and display via. JSP's, you need to check out the RSS JSP tag library and RSS-desk projects that are based on Informa.

Read: OPML to HMTL using Informa

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