http://snippets.dzone.com/posts Sun, 18 May 2008 01:48:22 GMT DZone Snippets: taglib code http://snippets.dzone.com/posts/show/2962 // taglib to display rss in jsp page <br /> <br /><code> <br />package com.ranjan.feedreader; <br /> <br />/** <br /> * Created by IntelliJ IDEA. <br /> * User: Rapid <br /> * Date: Oct 9, 2006 <br /> * Time: 3:18:23 PM <br /> * To change this template use File | Settings | File Templates. <br /> */ <br />import java.net.URL; <br />import java.util.Iterator; <br />import java.util.HashMap; <br /> <br />import com.sun.syndication.feed.module.Module; <br />import com.sun.syndication.feed.synd.SyndEntry; <br />import com.sun.syndication.feed.synd.SyndFeed; <br />import com.sun.syndication.io.SyndFeedInput; <br />import com.sun.syndication.io.XmlReader; <br />import javax.servlet.jsp.JspContext; <br /> <br />import javax.servlet.jsp.tagext.Tag; <br />import javax.servlet.jsp.tagext.TagSupport; <br />import javax.servlet.jsp.JspException; <br /> <br />/* this tag should return the RSS feed as it is <br /> *it's purpose is to retrieve rss feeds <br /> * <br /> */ <br /> <br />public class FeedReader extends TagSupport{ <br /> <br /> private String url = null; <br /> <br /> <br /> <br /> <br /> <br /> SyndFeedInput input ; <br /> URL feedUrl; <br /> SyndFeed feed ; <br /> String html ; <br /> <br /> <br /> public String getUrl() { <br /> return url; <br /> } <br /> <br /> public void setUrl(String url) { <br /> this.url = url; <br /> } <br /> <br /> public int doStartTag() throws JspException { <br /> <br /> return EVAL_BODY_INCLUDE; //To change body of overridden methods use File | Settings | File Templates. <br /> } <br /> <br /> public int doEndTag() throws JspException { <br /> <br /> <br /> <br /> <br /> try { <br /> <br /> <br /> <br /> feedUrl = new URL(url); <br /> <br /> input = new SyndFeedInput(); <br /> <br /> feed = input.build(new XmlReader(feedUrl)); <br />/* <br /> String metaRSS = "Title: " + feed.getTitle() + "\n" + <br /> "Author: " + feed.getAuthor() + "\n" + <br /> "Description: " + feed.getDescription() + "\n" + <br /> "Pub date: " + feed.getPublishedDate() + "\n" + <br /> "Copyright: " + feed.getCopyright() ; <br /> <br /> pageContext.getOut().write( metaRSS ); <br />*/ <br /> <br /> html = <br /> <br /> "<table border='1'>" + <br /> "<tr>" + <br /> "<td>" + feed.getTitle() + <br /> "</td>" + <br /> "</tr>" + <br /> "<tr>" + <br /> "<td>" + feed.getDescription() + <br /> "</td>" + <br /> "</tr>" + <br /> "<tr>" + <br /> "<td>" + feed.getCopyright() + <br /> "</td>" + <br /> "</tr>" + <br /> <br /> <br /> "<tr>" + <br /> "<table>" ; <br /> <br /> //"<td> <a href = '#' onclick = " + "\"" + "popup_rss_article('" + /**/ + "') \"" + ">" + /**/ + "</a></td>" <br /> for( Iterator iter = feed.getEntries().iterator(); iter.hasNext(); ){ <br /> <br /> html += "<tr>" + <br /> createHREF(((SyndEntry)iter.next()).getLink() , ((SyndEntry)iter.next()).getTitle() ) + <br /> // "<td> <a href = '#' onclick = " + "\"" + "popup_rss_article('" +((SyndEntry)iter.next()).getLink() + "') \"" + ">" + ((SyndEntry)iter.next()).getTitle() + "</a></td>" + <br /> "</tr>"; <br /> //((SyndEntry)iter.next()).getLink().toString() <br /> } <br /> <br /> html += <br /> "</table>" + <br /> "</tr>" + <br /> "</table>" ; <br /> <br /> <br /> pageContext.getOut().write( html ); <br /> <br /> <br /> } <br /> catch (Exception ex) { <br /> ex.printStackTrace(); <br /> System.out.println("ERROR: " + ex.getMessage()); <br /> } <br /> <br /> <br /> <br /> <br /> <br /> <br /> return EVAL_PAGE; //To change body of overridden methods use File | Settings | File Templates. <br /> } <br /> public String createHREF( String link, String value ) <br /> { <br /> return "<td> <a href = '#' onclick = " + "\"" + "popup_rss_article('" + link + "') \"" + ">" + value + "</a></td>"; <br /> } <br /> <br />} <br /> <br />////////////////////////////////////////// <br />tld ///////////////////////////////// <br />////////////////////////////////////////// <br /> <br /></code> Fri, 03 Nov 2006 18:08:03 GMT http://snippets.dzone.com/posts/show/2962 ranjan_company (ranjan) http://snippets.dzone.com/posts/show/2960 // jsp taglibrary for rss <br /> <br /><code> <br />// the java code <br />package com.ranjan.feedreader; <br /> <br />/** <br /> * Created by IntelliJ IDEA. <br /> * User: Rapid <br /> * Date: Oct 9, 2006 <br /> * Time: 3:18:23 PM <br /> * To change this template use File | Settings | File Templates. <br /> */ <br />import java.net.URL; <br />import java.util.Iterator; <br />import java.util.HashMap; <br /> <br />import com.sun.syndication.feed.module.Module; <br />import com.sun.syndication.feed.synd.SyndEntry; <br />import com.sun.syndication.feed.synd.SyndFeed; <br />import com.sun.syndication.io.SyndFeedInput; <br />import com.sun.syndication.io.XmlReader; <br />import javax.servlet.jsp.JspContext; <br /> <br />import javax.servlet.jsp.tagext.Tag; <br />import javax.servlet.jsp.tagext.TagSupport; <br />import javax.servlet.jsp.JspException; <br /> <br />/* this tag should return the RSS feed as it is <br /> *it's purpose is to retrieve rss feeds <br /> * <br /> */ <br /> <br />public class FeedReader extends TagSupport{ <br /> <br /> private String url = null; <br /> <br /> <br /> <br /> <br /> <br /> SyndFeedInput input ; <br /> URL feedUrl; <br /> SyndFeed feed ; <br /> String html ; <br /> <br /> <br /> public String getUrl() { <br /> return url; <br /> } <br /> <br /> public void setUrl(String url) { <br /> this.url = url; <br /> } <br /> <br /> public int doStartTag() throws JspException { <br /> <br /> return EVAL_BODY_INCLUDE; //To change body of overridden methods use File | Settings | File Templates. <br /> } <br /> <br /> public int doEndTag() throws JspException { <br /> <br /> <br /> <br /> <br /> try { <br /> <br /> <br /> <br /> feedUrl = new URL(url); <br /> <br /> input = new SyndFeedInput(); <br /> <br /> feed = input.build(new XmlReader(feedUrl)); <br />/* <br /> String metaRSS = "Title: " + feed.getTitle() + "\n" + <br /> "Author: " + feed.getAuthor() + "\n" + <br /> "Description: " + feed.getDescription() + "\n" + <br /> "Pub date: " + feed.getPublishedDate() + "\n" + <br /> "Copyright: " + feed.getCopyright() ; <br /> <br /> pageContext.getOut().write( metaRSS ); <br />*/ <br /> <br /> html = <br /> <br /> "<table border='1'>" + <br /> "<tr>" + <br /> "<td>" + feed.getTitle() + <br /> "</td>" + <br /> "</tr>" + <br /> "<tr>" + <br /> "<td>" + feed.getDescription() + <br /> "</td>" + <br /> "</tr>" + <br /> "<tr>" + <br /> "<td>" + feed.getCopyright() + <br /> "</td>" + <br /> "</tr>" + <br /> <br /> <br /> "<tr>" + <br /> "<table>" ; <br /> <br /> for( Iterator iter = feed.getEntries().iterator(); iter.hasNext(); ){ <br /> html += "<tr>" + <br /> "<td><a href = " + ((SyndEntry)iter.next()).getLink() + ">" + <br /> ((SyndEntry)iter.next()).getTitle() + "</a>" + <br /> <br /> "</td>" + <br /> <br /> "</tr>" ; <br /> <br /> //((SyndEntry)iter.next()).getLink().toString() <br /> } <br /> <br /> html += <br /> "</table>" + <br /> "</tr>" + <br /> "</table>" ; <br /> <br /> <br /> pageContext.getOut().write( html ); <br /> <br /> <br /> } <br /> catch (Exception ex) { <br /> ex.printStackTrace(); <br /> System.out.println("ERROR: " + ex.getMessage()); <br /> } <br /> <br /> <br /> <br /> <br /> <br /> <br /> return EVAL_PAGE; //To change body of overridden methods use File | Settings | File Templates. <br /> } <br /> <br /> <br />} <br />////////////////////////////////////////////////// <br /> <br />// the tld file <br />////////////////////////////////////////////////// <br /><?xml version="1.0" encoding="UTF-8"?> <br /><taglib version="2.0" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee web-jsptaglibrary_2_0.xsd"> <br /> <tlib-version>1.0</tlib-version> <br /> <short-name>rss</short-name> <br /> <uri>/WEB-INF/tlds/rss</uri> <br /> <br /> <tag> <br /> <name>rss</name> <br /> <tag-class>com.ranjan.feedreader.FeedReader</tag-class> <br /> <body-content>empty</body-content> <br /> <attribute> <br /> <name>url</name> <br /> <required>true</required> <br /> <rtexprvalue>false</rtexprvalue> <br /> </attribute> <br /> <br /> <br /> </tag> <br /> <!-- A validator verifies that the tags are used correctly at JSP <br /> translation time. Validator entries look like this: <br /> <validator> <br /> <validator-class>com.mycompany.TagLibValidator</validator-class> <br /> <init-param> <br /> <param-name>parameter</param-name> <br /> <param-value>value</param-value> <br /> </init-param> <br /> </validator> <br /> --> <br /> <!-- A tag library can register Servlet Context event listeners in <br /> case it needs to react to such events. Listener entries look <br /> like this: <br /> <listener> <br /> <listener-class>com.mycompany.TagLibListener</listener-class> <br /> </listener> <br /> --> <br /> <br /></taglib> <br /> <br /></code> Fri, 03 Nov 2006 12:38:54 GMT http://snippets.dzone.com/posts/show/2960 ranjan_company (ranjan)