Lire un flux RSS en parsant le fichier XML

Version imprimable

Bonjour,

comme le titre l'indique, j'essaie de lire un flux RSS avec XML

le Programme fonctionne bien avec l'adresse suivante :
reader.parse("http://fobec.com/CMS/fobec.xml");

MAIS pas avec
reader.parse("http://earthquake.usgs.gov/eqcenter/catalogs/1day-M2.5.xml");

Message d'erreur :
Flux RSS:
23-sept.-2014 16:18:54 lire_RSS.CopyOfRSSReader GMTDateToFrench
GRAVE: null
java.text.ParseException: Unparseable date: ""
at java.text.DateFormat.parse(DateFormat.java:337)
at lire_RSS.CopyOfRSSReader.GMTDateToFrench(CopyOfRSSReader.java:127)
at lire_RSS.CopyOfRSSReader.parse(CopyOfRSSReader.java:43)
at lire_RSS.CopyOfRSSReader.main(CopyOfRSSReader.java:143)
Date de publication:
Flux RSS:

Voici le programme en question
Merci pour vos suggestions

Code:

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package lire_RSS;
 
import java.io.IOException;
import java.net.URL;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Locale;
import java.util.logging.Level;
import java.util.logging.Logger;
 
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
 
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
 
 
public class CopyOfRSSReader {
 
    /**
     * Parser le fichier XML
     * @param feedurl URL du flux RSS
     */
    public void parse(String feedurl) {
        try {
            DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
            URL url = new URL(feedurl);
            Document doc = builder.parse(url.openStream());
            NodeList nodes = null;
            Element element = null;
            /**
             * Titre et date du flux
             */
            nodes = doc.getElementsByTagName("title");
            Node node = doc.getDocumentElement();
            System.out.println("Flux RSS: " + this.readNode(node, "channel|link"));
            System.out.println("Date de publication: " + GMTDateToFrench(this.readNode(node, "channel|lastBuildDate")));
            System.out.println("Flux RSS: " + this.readNode(node, "channel|title"));
 
            System.out.println();
            /**
             * Elements du flux RSS
             **/
            nodes = doc.getElementsByTagName("item");
            for (int i = 0; i < nodes.getLength(); i++) {
                element = (Element) nodes.item(i);
                System.out.println("Lien: " + readNode(element, "link"));
                System.out.println("Titre: " + readNode(element, "title"));
                System.out.println("Description: " + readNode(element, "description"));
                System.out.println();
            } //for
            //for
        } catch (SAXException ex) {
            Logger.getLogger(CopyOfRSSReader.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(CopyOfRSSReader.class.getName()).log(Level.SEVERE, null, ex);
        } catch (ParserConfigurationException ex) {
            Logger.getLogger(CopyOfRSSReader.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
 
    /**
     * Méthode permettant de retourner ce que contient d'un noeud
     * @param _node le noeud principal
     * @param _path suite des noms des noeud sans espace séparer par des "|"
     * @return un string contenant le valeur du noeud voulu
     */
    public String readNode(Node _node, String _path) {
 
        String[] paths = _path.split("\\|");
        Node node = null;
 
        if (paths != null && paths.length > 0) {
            node = _node;
 
            for (int i = 0; i < paths.length; i++) {
                node = getChildByName(node, paths[i].trim());
            }
        }
 
        if (node != null) {
            return node.getTextContent();
        } else {
            return "";
        }
    }
 
    /**
     * renvoye le nom d'un noeud fils a partir de son nom
     * @param _node noeud pricipal
     * @param _name nom du noeud fils
     * @return le noeud fils
     */
    public Node getChildByName(Node _node, String _name) {
        if (_node == null) {
            return null;
        }
        NodeList listChild = _node.getChildNodes();
 
        if (listChild != null) {
            for (int i = 0; i < listChild.getLength(); i++) {
                Node child = listChild.item(i);
                if (child != null) {
                    if ((child.getNodeName() != null && (_name.equals(child.getNodeName()))) || (child.getLocalName() != null && (_name.equals(child.getLocalName())))) {
                        return child;
                    }
                }
            }
        }
        return null;
    }
 
    /**
     * Afficher une Date GML au format francais
     * @param gmtDate
     * @return
     */
    public String GMTDateToFrench(String gmtDate) {
        try {
            SimpleDateFormat dfGMT = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss z", Locale.ENGLISH);
            dfGMT.parse(gmtDate);
            SimpleDateFormat dfFrench = new SimpleDateFormat("EEEE, d MMMM yyyy HH:mm:ss", Locale.FRANCE);
            return dfFrench.format(dfGMT.getCalendar().getTime());
        } catch (ParseException ex) {
            Logger.getLogger(CopyOfRSSReader.class.getName()).log(Level.SEVERE, null, ex);
        }
        return "";
    }
 
    /**
     * Exemple
     * @param args
     */
    public static void main(String[] args) {
        CopyOfRSSReader reader = new CopyOfRSSReader();
        //reader.parse("http://fobec.com/CMS/fobec.xml");
        reader.parse("http://earthquake.usgs.gov/eqcenter/catalogs/1day-M2.5.xml");
 
    }
}

23/09/2014, 16h50
Népomucène

Comme indiqué dans le stack d'erreur, il s'agit d'un problème de format date

date dans le 1er site :

Thu, 18 Sep 2014 09:19:19 GMT
pour cela tu utilises : new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss z", Locale.ENGLISH) et ça marche ... :)

date dans le 2ème site :

2014-09-22T17:57:02Z
pour cela tu utilises le même format : new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss z", Locale.ENGLISH) et ça marche pas ! ... :(

donc tu ne peux pas utiliser le même format de date :?
23/09/2014, 17h08
michelp3

merci de ta réponse

OK , il y a un problème de date mais passons ( je la mets en commentaire)

ce qui me pose vraiment un problème , c'est que je n 'obtiens pas de résultat pour

System.out.println("Flux RSS: " + this.readNode(node, "channel|link"));
et
System.out.println("Flux RSS: " + this.readNode(node, "channel|title"));

rien non plus pour les items
23/09/2014, 17h20
Népomucène

Dans le 1er site, la balise XML chanel existe
mais pas dans le second site. Donc ça ne peut pas fonctionner !

Il faut que tu regardes le code source de la page de tes sites pour voir les balises utilisées (ainsi que le format des données d'ailleurs)

A l'armée, on t'aurait dit : "même motif, même punition ..." :mouarf:

la balise <channel est là

voici le source

Code:

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<?xml version="1.0" encoding="utf-8"?>
<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005">
<channel xmlns:cfi="http://www.microsoft.com/schemas/rss/core/2005/internal" cfi:lastdownloaderror="None">
<link>http://earthquake.usgs.gov/earthquakes/</link>
<atom:updated>2014-09-22T14:28:53Z</atom:updated>
<lastBuildDate>Mon, 22 Sep 2014 14:28:53 GMT</lastBuildDate>
<title cf:type="text">USGS M 2.5+ Earthquakes</title>
<description cf:type="text">Real-time, worldwide earthquake list for the past day</description>
<atom:link href="http://earthquake.usgs.gov/earthquakes/catalogs/1day-M2.5.xml" rel="self"/>
<atom:link href="http://earthquake.usgs.gov/earthquakes/"/>
<managingEditor>U.S. Geological Survey</managingEditor>
<atom:author><atom:name>U.S. Geological Survey</atom:name>
</atom:author><cf:guid isPermaLink="false">http://earthquake.usgs.gov/</cf:guid>
<item>
	<link>http://earthquake.usgs.gov/earthquakes/catalogs/</link>
	<guid isPermaLink="false">urn:earthquake-usgs-gov:announcement-deprecated</guid>
	<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text">Data Feed Deprecated</title>
	<atom:updated xmlns:atom="http://www.w3.org/2005/Atom">2014-09-22T14:28:53Z</atom:updated>
	<atom:link xmlns:atom="http://www.w3.org/2005/Atom" href="http://earthquake.usgs.gov/earthquakes/catalogs/" rel="alternate" type="text/html"/>
	<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html">&amp;lt;p style=&amp;quot;font-weight:bold;color:#900;&amp;quot;&amp;gt;This USGS data file has been deprecated.&amp;lt;/p&amp;gt;&amp;lt;p&amp;gt;To continue receiving updates for earthquake information you must switch to the &amp;lt;a href=&amp;quot;<a href="http://earthquake.usgs.gov/earthquakes/feed/&amp;quot;&amp;gt;new" target="_blank">http://earthquake.usgs.gov/earthquak...ot;&amp;gt;new</a> data
		format&amp;lt;/a&amp;gt;.&amp;lt;/p&amp;gt;&amp;lt;p&amp;gt;In the future, data feeds will be updated and deprecated following our &amp;lt;a href=&amp;quot;<a href="http://earthquake.usgs.gov/earthquakes/feed/policy.php&amp;quot;&amp;gt;official" target="_blank">http://earthquake.usgs.gov/earthquak...mp;gt;official</a> deprecation policy&amp;lt;/a&amp;gt;.&amp;lt;/p&amp;gt;</description>
	<cfi:id>4</cfi:id>
	<cfi:effectiveId>3101266789</cfi:effectiveId>
	<cfi:read>true</cfi:read>
	<cfi:downloadurl>http://earthquake.usgs.gov/earthquakes/catalogs/1day-M2.5.xml</cfi:downloadurl>
	<cfi:lastdownloadtime>2014-09-22T14:32:58.978Z</cfi:lastdownloadtime>
</item>
<item>
	<link>http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/uw60884306.php</link>
	<guid isPermaLink="false">urn:earthquake-usgs-gov:uw:60884306</guid>
	<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text">M 2.5, Nevada</title>
	<atom:updated xmlns:atom="http://www.w3.org/2005/Atom">2014-09-22T02:28:54Z</atom:updated>
	<atom:link xmlns:atom="http://www.w3.org/2005/Atom" href="http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/uw60884306.php" rel="alternate" type="text/html"/>
	<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html">&lt;img src="http://earthquake.usgs.gov/images/globes/40_-120.jpg" alt="41.843°N 119.706°W" align=left hspace=20&gt;&lt;p&gt;Monday, September 22, 2014 02:28:54 UTC&lt;br&gt;Sunday, September 21, 2014 07:28:54 PM at epicenter&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Depth&lt;/strong&gt;: 0.00 km (0.00 mi)&lt;/p&gt;</description>
	<georss:point xmlns="http://www.w3.org/2005/Atom" xmlns:georss="http://www.georss.org/georss">41.8433 -119.7057</georss:point>
	<georss:elev xmlns="http://www.w3.org/2005/Atom" xmlns:georss="http://www.georss.org/georss">-0</georss:elev>
	<category>Past day</category>
	<cfi:id>3</cfi:id>
	<cfi:effectiveId>2022970456</cfi:effectiveId>
	<cfi:read>true</cfi:read>
	<cfi:downloadurl>http://earthquake.usgs.gov/earthquakes/catalogs/1day-M2.5.xml</cfi:downloadurl>
	<cfi:lastdownloadtime>2014-09-22T14:32:58.978Z</cfi:lastdownloadtime>
</item>
<item>
	<link>http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/pr14265001.php</link>
	<guid isPermaLink="false">urn:earthquake-usgs-gov:pr:14265001</guid>
	<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text">M 3.4, Puerto Rico region</title>
	<atom:updated xmlns:atom="http://www.w3.org/2005/Atom">2014-09-22T02:16:10Z</atom:updated>
	<atom:link xmlns:atom="http://www.w3.org/2005/Atom" href="http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/pr14265001.php" rel="alternate" type="text/html"/>
	<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html">&lt;img src="http://earthquake.usgs.gov/images/globes/20_-65.jpg" alt="19.659°N 65.590°W" align=left hspace=20&gt;&lt;p&gt;Monday, September 22, 2014 02:16:10 UTC&lt;br&gt;Sunday, September 21, 2014 10:16:10 PM at epicenter&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Depth&lt;/strong&gt;: 43.00 km (26.72 mi)&lt;/p&gt;</description>
	<georss:point xmlns="http://www.w3.org/2005/Atom" xmlns:georss="http://www.georss.org/georss">19.6588 -65.5897</georss:point>
	<georss:elev xmlns="http://www.w3.org/2005/Atom" xmlns:georss="http://www.georss.org/georss">-43000</georss:elev>
	<category>Past day</category>
	<cfi:id>2</cfi:id>
	<cfi:effectiveId>1550548798</cfi:effectiveId>
	<cfi:read>true</cfi:read>
	<cfi:downloadurl>http://earthquake.usgs.gov/earthquakes/catalogs/1day-M2.5.xml</cfi:downloadurl>
	<cfi:lastdownloadtime>2014-09-22T14:32:58.978Z</cfi:lastdownloadtime>
</item>
<item>
	<link>http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/pr14264013.php</link>
	<guid isPermaLink="false">urn:earthquake-usgs-gov:pr:14264013</guid>
	<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text">M 2.8, Virgin Islands region</title>
	<atom:updated xmlns:atom="http://www.w3.org/2005/Atom">2014-09-21T21:24:20Z</atom:updated>
	<atom:link xmlns:atom="http://www.w3.org/2005/Atom" href="http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/pr14264013.php" rel="alternate" type="text/html"/>
	<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html">&lt;img src="http://earthquake.usgs.gov/images/globes/20_-65.jpg" alt="18.922°N 64.960°W" align=left hspace=20&gt;&lt;p&gt;Sunday, September 21, 2014 21:24:20 UTC&lt;br&gt;Sunday, September 21, 2014 05:24:20 PM at epicenter&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Depth&lt;/strong&gt;: 45.00 km (27.96 mi)&lt;/p&gt;</description>
	<georss:point xmlns="http://www.w3.org/2005/Atom" xmlns:georss="http://www.georss.org/georss">18.9220 -64.9600</georss:point>
	<georss:elev xmlns="http://www.w3.org/2005/Atom" xmlns:georss="http://www.georss.org/georss">-45000</georss:elev>
	<category>Past day</category>
	<cfi:id>1</cfi:id>
	<cfi:effectiveId>126265246</cfi:effectiveId>
	<cfi:read>true</cfi:read>
	<cfi:downloadurl>http://earthquake.usgs.gov/earthquakes/catalogs/1day-M2.5.xml</cfi:downloadurl>
	<cfi:lastdownloadtime>2014-09-22T14:32:58.978Z</cfi:lastdownloadtime>
</item>
<item>
	<link>http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/pr14264008.php</link>
	<guid isPermaLink="false">urn:earthquake-usgs-gov:pr:14264008</guid>
	<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text">M 2.9, Puerto Rico region</title>
	<atom:updated xmlns:atom="http://www.w3.org/2005/Atom">2014-09-21T17:59:15Z</atom:updated>
	<atom:link xmlns:atom="http://www.w3.org/2005/Atom" href="http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/pr14264008.php" rel="alternate" type="text/html"/>
	<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html">&lt;img src="http://earthquake.usgs.gov/images/globes/20_-65.jpg" alt="19.386°N 65.387°W" align=left hspace=20&gt;&lt;p&gt;Sunday, September 21, 2014 17:59:15 UTC&lt;br&gt;Sunday, September 21, 2014 01:59:15 PM at epicenter&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Depth&lt;/strong&gt;: 110.00 km (68.35 mi)&lt;/p&gt;</description>
	<georss:point xmlns="http://www.w3.org/2005/Atom" xmlns:georss="http://www.georss.org/georss">19.3857 -65.3874</georss:point>
	<georss:elev xmlns="http://www.w3.org/2005/Atom" xmlns:georss="http://www.georss.org/georss">-110000</georss:elev>
	<category>Past day</category>
	<cfi:id>0</cfi:id>
	<cfi:effectiveId>3828836918</cfi:effectiveId>
	<cfi:read>true</cfi:read>
	<cfi:downloadurl>http://earthquake.usgs.gov/earthquakes/catalogs/1day-M2.5.xml</cfi:downloadurl>
	<cfi:lastdownloadtime>2014-09-22T14:32:58.978Z</cfi:lastdownloadtime>
	</item>
	</channel>
	</rss>

En allant sur l'URL http://earthquake.usgs.gov/eqcenter/.../1day-M2.5.xml que tu nous as montrée, j'obtiens ce code-ci :

Code:

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<?xml version="1.0"?>
<feed xmlns="http://www.w3.org/2005/Atom" xmlns:georss="http://www.georss.org/georss">
  <updated>2014-09-23T15:43:16Z</updated>
  <title>USGS M 2.5+ Earthquakes</title>
  <subtitle>Real-time, worldwide earthquake list for the past day</subtitle>
  <link rel="self" href="http://earthquake.usgs.gov/earthquakes/catalogs/1day-M2.5.xml"/>
  <link href="http://earthquake.usgs.gov/earthquakes/"/>
  <author><name>U.S. Geological Survey</name></author>
  <id>http://earthquake.usgs.gov/</id>
  <icon>/favicon.ico</icon>
<entry><id>urn:earthquake-usgs-gov:announcement-deprecated</id><title>Data Feed Deprecated</title><updated>2014-09-23T15:43:16Z</updated><link rel="alternate" type="text/html" href="http://earthquake.usgs.gov/earthquakes/catalogs/"/><summary><![CDATA[<p style="font-weight:bold;color:#900;">This USGS data file has been deprecated.</p><p>To continue receiving updates for earthquake information you must switch to the <a href="http://earthquake.usgs.gov/earthquakes/feed/">new data
	format</a>.</p><p>In the future, data feeds will be updated and deprecated following our <a href="http://earthquake.usgs.gov/earthquakes/feed/policy.php">official deprecation policy</a>.</p>]]></summary></entry>  <entry><id>urn:earthquake-usgs-gov:pr:14266001</id><title>M 2.7, Puerto Rico region</title><updated>2014-09-23T07:13:13Z</updated><link rel="alternate" type="text/html" href="http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/pr14266001.php"/><summary type="html"><![CDATA[<img src="http://earthquake.usgs.gov/images/globes/20_-65.jpg" alt="18.584°N 65.521°W" align="left" hspace="20" /><p>Tuesday, September 23, 2014 07:13:13 UTC<br>Tuesday, September 23, 2014 03:13:13 AM at epicenter</p><p><strong>Depth</strong>: 23.00 km (14.29 mi)</p>]]></summary><georss:point>18.5839 -65.5205</georss:point><georss:elev>-23000</georss:elev><category label="Age" term="Past day"/></entry>
  <entry><id>urn:earthquake-usgs-gov:pr:14266000</id><title>M 3.2, north of the Virgin Islands</title><updated>2014-09-23T01:30:26Z</updated><link rel="alternate" type="text/html" href="http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/pr14266000.php"/><summary type="html"><![CDATA[<img src="http://earthquake.usgs.gov/images/globes/20_-65.jpg" alt="19.947°N 64.257°W" align="left" hspace="20" /><p>Tuesday, September 23, 2014 01:30:26 UTC<br>Monday, September 22, 2014 09:30:26 PM at epicenter</p><p><strong>Depth</strong>: 71.00 km (44.12 mi)</p>]]></summary><georss:point>19.9465 -64.2565</georss:point><georss:elev>-71000</georss:elev><category label="Age" term="Past day"/></entry>
  <entry><id>urn:earthquake-usgs-gov:pr:14265011</id><title>M 2.7, Virgin Islands region</title><updated>2014-09-22T17:57:02Z</updated><link rel="alternate" type="text/html" href="http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/pr14265011.php"/><summary type="html"><![CDATA[<img src="http://earthquake.usgs.gov/images/globes/20_-65.jpg" alt="19.003°N 64.919°W" align="left" hspace="20" /><p>Monday, September 22, 2014 17:57:02 UTC<br>Monday, September 22, 2014 01:57:02 PM at epicenter</p><p><strong>Depth</strong>: 28.00 km (17.40 mi)</p>]]></summary><georss:point>19.0030 -64.9188</georss:point><georss:elev>-28000</georss:elev><category label="Age" term="Past day"/></entry>
  <entry><id>urn:earthquake-usgs-gov:pr:14265009</id><title>M 2.7, Virgin Islands region</title><updated>2014-09-22T17:54:24Z</updated><link rel="alternate" type="text/html" href="http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/pr14265009.php"/><summary type="html"><![CDATA[<img src="http://earthquake.usgs.gov/images/globes/20_-65.jpg" alt="19.019°N 64.914°W" align="left" hspace="20" /><p>Monday, September 22, 2014 17:54:24 UTC<br>Monday, September 22, 2014 01:54:24 PM at epicenter</p><p><strong>Depth</strong>: 30.00 km (18.64 mi)</p>]]></summary><georss:point>19.0188 -64.9140</georss:point><georss:elev>-30000</georss:elev><category label="Age" term="Past day"/></entry>
  <entry><id>urn:earthquake-usgs-gov:pr:14265012</id><title>M 2.7, Virgin Islands region</title><updated>2014-09-22T17:50:12Z</updated><link rel="alternate" type="text/html" href="http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/pr14265012.php"/><summary type="html"><![CDATA[<img src="http://earthquake.usgs.gov/images/globes/20_-65.jpg" alt="18.997°N 64.937°W" align="left" hspace="20" /><p>Monday, September 22, 2014 17:50:12 UTC<br>Monday, September 22, 2014 01:50:12 PM at epicenter</p><p><strong>Depth</strong>: 30.00 km (18.64 mi)</p>]]></summary><georss:point>18.9972 -64.9371</georss:point><georss:elev>-30000</georss:elev><category label="Age" term="Past day"/></entry>
  <entry><id>urn:earthquake-usgs-gov:pr:14265005</id><title>M 2.5, Virgin Islands region</title><updated>2014-09-22T17:39:37Z</updated><link rel="alternate" type="text/html" href="http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/pr14265005.php"/><summary type="html"><![CDATA[<img src="http://earthquake.usgs.gov/images/globes/20_-65.jpg" alt="18.973°N 64.952°W" align="left" hspace="20" /><p>Monday, September 22, 2014 17:39:37 UTC<br>Monday, September 22, 2014 01:39:37 PM at epicenter</p><p><strong>Depth</strong>: 19.00 km (11.81 mi)</p>]]></summary><georss:point>18.9727 -64.9523</georss:point><georss:elev>-19000</georss:elev><category label="Age" term="Past day"/></entry>
  <entry><id>urn:earthquake-usgs-gov:pr:14265004</id><title>M 3.0, Virgin Islands region</title><updated>2014-09-22T17:36:28Z</updated><link rel="alternate" type="text/html" href="http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/pr14265004.php"/><summary type="html"><![CDATA[<img src="http://earthquake.usgs.gov/images/globes/20_-65.jpg" alt="18.973°N 64.919°W" align="left" hspace="20" /><p>Monday, September 22, 2014 17:36:28 UTC<br>Monday, September 22, 2014 01:36:28 PM at epicenter</p><p><strong>Depth</strong>: 29.00 km (18.02 mi)</p>]]></summary><georss:point>18.9726 -64.9190</georss:point><georss:elev>-29000</georss:elev><category label="Age" term="Past day"/></entry>
  <entry><id>urn:earthquake-usgs-gov:pr:14265007</id><title>M 2.8, Virgin Islands region</title><updated>2014-09-22T17:26:12Z</updated><link rel="alternate" type="text/html" href="http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/pr14265007.php"/><summary type="html"><![CDATA[<img src="http://earthquake.usgs.gov/images/globes/20_-65.jpg" alt="19.037°N 64.619°W" align="left" hspace="20" /><p>Monday, September 22, 2014 17:26:12 UTC<br>Monday, September 22, 2014 01:26:12 PM at epicenter</p><p><strong>Depth</strong>: 52.00 km (32.31 mi)</p>]]></summary><georss:point>19.0370 -64.6190</georss:point><georss:elev>-52000</georss:elev><category label="Age" term="Past day"/></entry>
  <entry><id>urn:earthquake-usgs-gov:pr:14265006</id><title>M 2.6, Puerto Rico region</title><updated>2014-09-22T16:56:35Z</updated><link rel="alternate" type="text/html" href="http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/pr14265006.php"/><summary type="html"><![CDATA[<img src="http://earthquake.usgs.gov/images/globes/20_-65.jpg" alt="19.646°N 65.534°W" align="left" hspace="20" /><p>Monday, September 22, 2014 16:56:35 UTC<br>Monday, September 22, 2014 12:56:35 PM at epicenter</p><p><strong>Depth</strong>: 50.00 km (31.07 mi)</p>]]></summary><georss:point>19.6455 -65.5339</georss:point><georss:elev>-50000</georss:elev><category label="Age" term="Past day"/></entry>
</feed>

Il n'y a pas de <channel>.

Ce n'est pas cette URL que tu utilises, finalement ?

23/09/2014, 17h57
michelp3

se tromper çà peut auusi aider

comme quoi çà sert parfois de se tromper ....

j'ai pris le source qui se trouve ds flux de mon navigateur

sans vous je ne m'en serais pas aperçu ...Merci bcp

Mais grâce à cela je vais pouvoir rebondir ... sur un exercice android qui m'a transporté sur les parseurs XML

je vous tiens au courant

a demain

Bonjour,

j'ai revu la question et j'ai modifié mon programme qui tourne

Mais je n'arrive pas à afficher le contenu de la balise link

Je pense que c'est parce que elle est conçue comme ceci :<link ...../>

et pas <link> .... </link>

QUID pour que çà marche , Merci pour vos réponses

voici le code

Code:

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package lire_RSS;
 
// copy de RSSReader pour montrer sur Developpez
 
import java.io.IOException;
import java.net.URL;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Locale;
import java.util.logging.Level;
import java.util.logging.Logger;
 
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
 
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
 
 
public class CopyOfRSSReader {
 
    /**
     * Parser le fichier XML
     * @param feedurl URL du flux RSS
     */
    public void parse(String feedurl) {
        try {
            DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
            URL url = new URL(feedurl);
            Document doc = builder.parse(url.openStream());
            NodeList nodes = null;
            Element element = null;
            /**
             * Titre et date du flux
             */
            Node node = doc.getDocumentElement();
            System.out.println("Flux RSS: " + this.readNode(node, "title"));
            System.out.println("Flux RSS: " + this.readNode(node, "link"));
            //System.out.println("Date de publication: " + GMTDateToFrench(this.readNode(node, "channel|lastBuildDate")));
 
 
            System.out.println();
            /**
             * Elements du flux RSS
             **/
            nodes = doc.getElementsByTagName("entry");
            for (int i = 0; i < nodes.getLength(); i++) {
                element = (Element) nodes.item(i);
                System.out.println("Titre: " + readNode(element, "title"));
                System.out.println("Lien: " + readNode(element, "link"));
                System.out.println("Description: " + readNode(element, "summary"));
                System.out.println();
            } //for
            //for
        } catch (SAXException ex) {
            Logger.getLogger(CopyOfRSSReader.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(CopyOfRSSReader.class.getName()).log(Level.SEVERE, null, ex);
        } catch (ParserConfigurationException ex) {
            Logger.getLogger(CopyOfRSSReader.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
 
    /**
     * Méthode permettant de retourner ce que contient d'un noeud
     * @param _node le noeud principal
     * @param _path suite des noms des noeud sans espace séparer par des "|"
     * @return un string contenant le valeur du noeud voulu
     */
    public String readNode(Node _node, String _path) {
 
        String[] paths = _path.split("\\|");
        Node node = null;
 
        if (paths != null && paths.length > 0) {
            node = _node;
 
            for (int i = 0; i < paths.length; i++) {
                node = getChildByName(node, paths[i].trim());
            }
        }
 
        if (node != null) {
            return node.getTextContent();
        } else {
            return "";
        }
    }
 
    /**
     * renvoye le nom d'un noeud fils a partir de son nom
     * @param _node noeud pricipal
     * @param _name nom du noeud fils
     * @return le noeud fils
     */
    public Node getChildByName(Node _node, String _name) {
        if (_node == null) {
            return null;
        }
        NodeList listChild = _node.getChildNodes();
 
        if (listChild != null) {
            for (int i = 0; i < listChild.getLength(); i++) {
                Node child = listChild.item(i);
                if (child != null) {
                    if ((child.getNodeName() != null && (_name.equals(child.getNodeName()))) || (child.getLocalName() != null && (_name.equals(child.getLocalName())))) {
                        return child;
                    }
                }
            }
        }
        return null;
    }
 
    /**
     * Afficher une Date GML au format francais
     * @param gmtDate
     * @return
     */
    public String GMTDateToFrench(String gmtDate) {
        try {
            SimpleDateFormat dfGMT = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss z", Locale.ENGLISH);
            dfGMT.parse(gmtDate);
            SimpleDateFormat dfFrench = new SimpleDateFormat("EEEE, d MMMM yyyy HH:mm:ss", Locale.FRANCE);
            return dfFrench.format(dfGMT.getCalendar().getTime());
        } catch (ParseException ex) {
            Logger.getLogger(CopyOfRSSReader.class.getName()).log(Level.SEVERE, null, ex);
        }
        return "";
    }
 
    /**
     * Exemple
     * @param args
     */
    public static void main(String[] args) {
        CopyOfRSSReader reader = new CopyOfRSSReader();
        reader.parse("http://earthquake.usgs.gov/eqcenter/catalogs/1day-M2.5.xml");
 
 
    }
}

24/09/2014, 15h39
thelvin

href est ce que l'on appelle un attribut. Je suggère getAttribute().

Note : lire du XML serait infiniment plus simple avec la bibliothèque tierce JDOM.
25/09/2014, 16h46
michelp3

bonjour,

la piste NamedNodeMap attrs = child.getAttributes();

s'avère être la bonne

Merci
25/09/2014, 16h53
thelvin

Euh.... Ouais, question de goûts je suppose, en étant très ouvert.
Il y avait un problème avec le très simple getAttribute("href") ?