FAQ Java XMLConsultez toutes les FAQ

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xmlns:fn="http://www.w3.org/2005/xpath-functions"   
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://serveur.com/schema/blog blog.xsd"  
xmlns:xs="http://www.w3.org/2001/XMLSchema"

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public static void evaluerDOM(Document document, String expression, QName retour){ 
	try{ 
		//création du XPath  
		XPathFactory fabrique = XPathFactory.newInstance(); 
		XPath xpath = fabrique.newXPath(); 
  
		//évaluation de l'expression XPath 
		XPathExpression exp = xpath.compile(expression); 
		Object resultat = exp.evaluate(document,retour); 
  
		System.out.println(resultat); 
	}catch(XPathExpressionException xpee){ 
		xpee.printStackTrace(); 
	} 
}

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public static void evaluerSAX(File fichier, String expression, QName retour){ 
	try{ 
		//création de la source 
		InputSource source = new InputSource(new FileInputStream(fichier)); 
  
		//création du XPath  
		XPathFactory fabrique = XPathFactory.newInstance(); 
		XPath xpath = fabrique.newXPath(); 
  
		//évaluation de l'expression XPath 
		XPathExpression exp = xpath.compile(expression); 
		Object resultat = exp.evaluate(source,retour); 
  
		System.out.println(resultat); 
	}catch(XPathExpressionException xpee){ 
		xpee.printStackTrace(); 
	}catch(IOException  ioe){ 
		ioe.printStackTrace(); 
	} 
}

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                    XPath xpath = XPathFactory.newInstance().newXPath(); 
                    Object resultat = xpath.evaluate(expression,document,retour);

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NamespaceContext namespace = new NamespaceContext(){ 
	public String getNamespaceURI(String prefix){ 
		if("content".equals(prefix)){ 
			return "http://purl.org/rss/1.0/modules/content/"; 
		}else{ 
			return null; 
		} 
	} 
	public String getPrefix(String namespaceURI){ 
		if("http://purl.org/rss/1.0/modules/content/".equals(namespaceURI)){ 
			return "content"; 
		}else{ 
			return null; 
		} 
	} 
	public Iterator getPrefixes(String namespaceURI){ 
		return null; 
	}  
}; 
XPathFactory fabrique = XPathFactory.newInstance(); 
XPath xpath = fabrique.newXPath(); 
xpath.setNamespaceContext(namespace);

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public static NodeList evaluer(InputStream stream, String expression){ 
	NodeList liste = null; 
	try{ 
		//création de la source 
		InputSource source = new InputSource(stream); 
  
		//création du XPath  
		XPathFactory fabrique = XPathFactory.newInstance(); 
		XPath xpath = fabrique.newXPath(); 
  
		//évaluation de l'expression XPath 
		XPathExpression exp = xpath.compile(expression); 
		liste = (NodeList)exp.evaluate(source,XPathConstants.NODESET); 
  
	}catch(XPathExpressionException xpee){ 
		xpee.printStackTrace(); 
	} 
	return liste; 
}

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URL url = new URL("http://blog.developpez.com/xmlsrv/rss2.php?blog=1"); 
  
String expression = "//item/title"; 
  
System.out.println("Articles disponibles sur le blog de developpez.com"); 
NodeList liste = evaluer(url.openStream(),expression); 
if(liste != null){ 
	for(int i=0; i&<liste.getLength(); i++){ 
		Node node = liste.item(i); 
		System.out.println(node.getTextContent()); 
	} 
}

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public static Node evaluer(InputStream stream, String expression){ 
	Node node = null; 
	try{ 
		//création de la source 
		InputSource source = new InputSource(stream); 
  
		//création du XPath  
		XPathFactory fabrique = XPathFactory.newInstance(); 
		XPath xpath = fabrique.newXPath(); 
  
		//évaluation de l'expression XPath 
		XPathExpression exp = xpath.compile(expression); 
		node = (Node)exp.evaluate(source,XPathConstants.NODE); 
  
	}catch(XPathExpressionException xpee){ 
		xpee.printStackTrace(); 
	} 
	return node; 
}

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URL url = new URL("http://blog.developpez.com/xmlsrv/rss2.php?blog=12"); 
  
String expression = "rss/channel/item/title"; 
  
Node node = evaluer(url.openStream(),expression); 
System.out.println(node.getTextContent());

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public static Boolean evaluer(InputStream stream, String expression){ 
	Boolean b = null; 
	try{ 
		//création de la source 
		InputSource source = new InputSource(stream); 
  
		//création du XPath  
		XPathFactory fabrique = XPathFactory.newInstance(); 
		XPath xpath = fabrique.newXPath(); 
  
		//évaluation de l'expression XPath 
		XPathExpression exp = xpath.compile(expression); 
		b = (Boolean)exp.evaluate(source,XPathConstants.BOOLEAN); 
  
		}catch(XPathExpressionException xpee){ 
		xpee.printStackTrace(); 
	} 
	return b; 
}

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URL url = new URL("http://blog.developpez.com/xmlsrv/rss2.php?blog=1"); 
  
String expression = "rss/channel/item[position()=1 and contains(./link/text(),'blog=12')]"; 
  
Boolean b = evaluer(url.openStream(),expression); 
String s = ""; 
if(b){ 
	s = "Le premier message du blog de developpez.com appartient à la rubrique Java"; 
}else{ 
	s = "Le premier message du blog de developpez.com n'appartient pas à la rubrique Java"; 
} 
System.out.println(s);

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public static String evaluer(InputStream stream, String expression,  
	NamespaceContext namespace){ 
	String string = null; 
	try{ 
		//création de la source 
		InputSource source = new InputSource(stream); 
  
		//création du XPath  
		XPathFactory fabrique = XPathFactory.newInstance(); 
		XPath xpath = fabrique.newXPath(); 
		if(namespace != null){ 
			xpath.setNamespaceContext(namespace); 
		} 
  
		//évaluation de l'expression XPath 
		XPathExpression exp = xpath.compile(expression); 
		string = (String)exp.evaluate(source,XPathConstants.STRING); 
  
	}catch(XPathExpressionException xpee){ 
		xpee.printStackTrace(); 
	} 
	return string; 
}

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URL url = new URL("http://blog.developpez.com/xmlsrv/rss2.php?blog=1"); 
  
String expression = "//item/content:encoded"; 
NamespaceContext namespace = new NamespaceContext(){ 
	public String getNamespaceURI(String prefix){ 
		if("content".equals(prefix)){ 
			return "http://purl.org/rss/1.0/modules/content/"; 
		}else{ 
			return null; 
		} 
	} 
	public String getPrefix(String namespaceURI){ 
		if("http://purl.org/rss/1.0/modules/content/".equals(namespaceURI)){ 
			return "content"; 
		}else{ 
			return null; 
		} 
	} 
	public Iterator getPrefixes(String namespaceURI){ 
		return null; 
	}  
}; 
  
String article = evaluer(url.openStream(),expression,namespace); 
  
JTextPane pane = new JTextPane(); 
pane.setContentType("text/html"); 
pane.setPreferredSize(new Dimension(200,200)); 
JScrollPane scroll = new JScrollPane(pane); 
  
JFrame frame = new JFrame(); 
//etc. 
frame.setVisible(true); 
  
pane.setText(article);

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public static Double evaluer(InputStream stream, String expression){ 
	Double number = null; 
	try{ 
		//création de la source 
		InputSource source = new InputSource(stream); 
  
		//création du XPath  
		XPathFactory fabrique = XPathFactory.newInstance(); 
		XPath xpath = fabrique.newXPath(); 
  
		//évaluation de l'expression XPath 
		XPathExpression exp = xpath.compile(expression); 
		number = (Double)exp.evaluate(source,XPathConstants.NUMBER); 
  
	}catch(XPathExpressionException xpee){ 
		xpee.printStackTrace(); 
	} 
	return number; 
}

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URL url = new URL("http://blog.developpez.com/xmlsrv/rss2.php?blog=12"); 
  
String expression = "count(rss/channel/item/category[text()='3. Technologie J2EE'])"; 
  
Double number = evaluer(url.openStream(),expression); 
System.out.println("Il y a "+number+" news J2EE sur le blog de la rubrique Java");