Het lezen van een XML-bestand in Java verschilt sterk van het lezen van andere bestanden zoals .docx en .txt, omdat het XML-bestand gegevens tussen de tags bevat. Java biedt vele manieren om een ​​XML-bestand te parseren. Er zijn twee parsers in Java die een XML-bestand parseren:

• Java DOM Parser
• Java JUIST Parser

Java DOM-parser

De DOM-API biedt de klassen om een ​​XML-bestand te lezen en te schrijven. We kunnen het knooppunt maken, verwijderen, wijzigen en herschikken met behulp van de DOM API. DOM-parser parseert het volledige XML-bestand en maakt een DOM voorwerp in het geheugen. Het modelleert een XML-bestand in een boom structuur voor gemakkelijke verplaatsing en manipulatie. In DOM is alles in een XML-bestand een knooppunt . Het knooppunt vertegenwoordigt een onderdeel van een XML-bestand. DOM-parser is langzaam in proces en bezet veel geheugen wanneer het een XML-bestand in het geheugen laadt.

We moeten het proces hebben gevolgd om een ​​XML-bestand in Java te lezen:

Instantieer XML-bestand:DOM-parser laadt het XML-bestand in het geheugen en beschouwt elke tag als een element.Hoofdknooppunt ophalen:Documentklasse biedt de getDocumentElement() methode om het hoofdknooppunt en het element van het XML-bestand op te halen.Alle knooppunten ophalen:De getElementByTagName() methode haalt alle specifieke tagnamen op uit het XML-bestand. Waar ELEMENT_NODE type verwijst naar een niet-tekstknooppunt dat subelementen heeft. Als we vanaf het begin toegang moeten hebben tot alle knooppunten, inclusief het hoofdknooppunt, kunnen we recursief de methode getChildElement() aanroepen.Knooppunt ophalen op tekstwaarde:We kunnen gebruiken getElementByTextValue() methode om een ​​knooppunt op basis van zijn waarde te zoeken.Knooppunt ophalen op attribuutwaarde:Als we een knooppunt willen zoeken op de waarde van een specifiek attribuut, kunnen we de methode getElementByTagName() gebruiken in combinatie met de methode getAttribute().

Stappen om XML-bestanden in Java te lezen met behulp van eclipse

Stap 1: Maak een eenvoudig Java project.

java boolean naar string

Stap 2: Maak een klassenbestand en geef een klassebestandsnaam op. We hebben het klassenbestand gemaakt met de naam LeesXMLFileVoorbeeld1 .

Stap 3: Schrijf de volgende code.

Stap 4: Downloaden dom-2.3.0-jaxb-1.0.6.jar bestand: Klik hier...

Stap 5: Maak een libr map in het project.

Stap 6: Kopiëren dom-2.3.0-jaxb-1.0.6.jar bestand en plak het in de map lib.

Stap 7: Stel de klasse pad :

Klik met de rechtermuisknop op het project->Bouwpad->Configureer bouwpad->Externe JAR's toevoegen->Selecteer het JAR-bestand->klik op de knop Openen->Toepassen en sluiten.

Stap 8: Creëer een XML bestand. We hebben een XML-bestand met naam gemaakt XML-bestand.xml en schrijf de volgende gegevens erin.

Stap 9: Voer het project uit.

XML-bestand maken: XML-bestand.xml

 101 Naman Kumar Math 83 102 Kapil Kumar Chemistry 60 103 Harsh Singh English 70 104 Jitesh Singh Physics 76 

Voorbeeld van het lezen van een XML-bestand met DOM Parser

 import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.DocumentBuilder; import org.w3c.dom.Document; import org.w3c.dom.NodeList; import org.w3c.dom.Node; import org.w3c.dom.Element; import java.io.File; public class ReadXMLFileExample1 { public static void main(String argv[]) { try { //creating a constructor of file class and parsing an XML file File file = new File(&apos;F:\XMLFile.xml&apos;); //an instance of factory that gives a document builder DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); //an instance of builder to parse the specified xml file DocumentBuilder db = dbf.newDocumentBuilder(); Document doc = db.parse(file); doc.getDocumentElement().normalize(); System.out.println(&apos;Root element: &apos; + doc.getDocumentElement().getNodeName()); NodeList nodeList = doc.getElementsByTagName(&apos;student&apos;); // nodeList is not iterable, so we are using for loop for (int itr = 0; itr <nodelist.getlength(); itr++) { node system.out.println('
node name :' + node.getnodename()); if (node.getnodetype()="=" node.element_node) element eelement="(Element)" node; system.out.println('student id: '+ eelement.getelementsbytagname('id').item(0).gettextcontent()); system.out.println('first name: eelement.getelementsbytagname('firstname').item(0).gettextcontent()); system.out.println('last eelement.getelementsbytagname('lastname').item(0).gettextcontent()); system.out.println('subject: eelement.getelementsbytagname('subject').item(0).gettextcontent()); system.out.println('marks: eelement.getelementsbytagname('marks').item(0).gettextcontent()); } catch (exception e) e.printstacktrace(); < pre> <p> <strong>Output:</strong> </p> <pre> Root element: class Node Name: student Student id: 101 First Name: Naman Last Name: Kumar Subject: Math Marks: 83 Node Name: student Student id: 102 First Name: Kapil Last Name: Kumar Subject: Chemistry Marks: 60 Node Name: student Student id: 103 First Name: Harsh Last Name: Singh Subject: English Marks: 70 Node Name: student Student id: 104 First Name: Jitesh Last Name: Singh Subject: Physics Marks: 76 </pre> <p>Let&apos;s see another example of reading xml file.</p> <p> <strong>Example of reading XML file using DOM Parser</strong> </p> <p>The following example reads the same XML file <strong>XMLFile.xml</strong> , and showing that how to loop the node one by one. It prints the node value, name and attribute if any.</p> <p> <strong>Example</strong> </p> <pre> import java.io.File; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import org.w3c.dom.Document; import org.w3c.dom.NamedNodeMap; import org.w3c.dom.Node; import org.w3c.dom.NodeList; public class ReadXMLFileExample2 { public static void main(String[] args) { try { File file = new File(&apos;F:\XMLFile.xml&apos;); DocumentBuilder documentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder(); Document document = documentBuilder.parse(file); System.out.println(&apos;Root element: &apos;+ document.getDocumentElement().getNodeName()); if (document.hasChildNodes()) { printNodeList(document.getChildNodes()); } } catch (Exception e) { System.out.println(e.getMessage()); } } private static void printNodeList(NodeList nodeList) { for (int count = 0; count <nodelist.getlength(); count++) { node elemnode="nodeList.item(count);" if (elemnode.getnodetype()="=" node.element_node) get name and value system.out.println('
node [open]'); system.out.println('node content=" + elemNode.getTextContent()); if (elemNode.hasAttributes()) { NamedNodeMap nodeMap = elemNode.getAttributes(); for (int i = 0; i &lt; nodeMap.getLength(); i++) { Node node = nodeMap.item(i); System.out.println(" attr : ' + node.getnodename()); system.out.println('attr node.getnodevalue()); } (elemnode.haschildnodes()) recursive call the has child nodes printnodelist(elemnode.getchildnodes()); [close]'); < pre> <p> <strong>Output:</strong> </p> <pre> Root element: class Node Name =class [OPEN] Node Content = 101 Naman Kumar Maths 83 102 Kapil Kumar Chemistry 60 103 Harsh Singh English 70 104 Jitesh Singh Physics 76 Node Name =student [OPEN] Node Content = 101 Naman Kumar Maths 83 Node Name =id [OPEN] Node Content =101 Node Name =id [CLOSE] Node Name =firstname [OPEN] Node Content =Naman Node Name =firstname [CLOSE] Node Name =lastname [OPEN] Node Content =Kumar Node Name =lastname [CLOSE] Node Name =subject [OPEN] Node Content =Math Node Name =subject [CLOSE] Node Name =marks [OPEN] Node Content =83 Node Name =marks [CLOSE] Node Name =student [CLOSE] Node Name =student [OPEN] Node Content = 102 Kapil Kumar Chemistry 60 Node Name =id [OPEN] Node Content =102 Node Name =id [CLOSE] Node Name =firstname [OPEN] Node Content =Kapil Node Name =firstname [CLOSE] Node Name =lastname [OPEN] Node Content =Kumar Node Name =lastname [CLOSE] Node Name =subject [OPEN] Node Content =Chemistry Node Name =subject [CLOSE] Node Name =marks [OPEN] Node Content =60 Node Name =marks [CLOSE] Node Name =student [CLOSE] Node Name =student [OPEN] Node Content = 103 Harsh Singh English 70 Node Name =id [OPEN] Node Content =103 Node Name =id [CLOSE] Node Name =firstname [OPEN] Node Content =Harsh Node Name =firstname [CLOSE] Node Name =lastname [OPEN] Node Content =Singh Node Name =lastname [CLOSE] Node Name =subject [OPEN] Node Content =English Node Name =subject [CLOSE] Node Name =marks [OPEN] Node Content =70 Node Name =marks [CLOSE] Node Name =student [CLOSE] Node Name =student [OPEN] Node Content = 104 Jitesh Singh Physics 76 Node Name =id [OPEN] Node Content =104 Node Name =id [CLOSE] Node Name =firstname [OPEN] Node Content =Jitesh Node Name =firstname [CLOSE] Node Name =lastname [OPEN] Node Content =Singh Node Name =lastname [CLOSE] Node Name =subject [OPEN] Node Content =Physics Node Name =subject [CLOSE] Node Name =marks [OPEN] Node Content =76 Node Name =marks [CLOSE] Node Name =student [CLOSE] Node Name =class [CLOSE] </pre> <h2>Java SAX Parser</h2> <p>Java SAX parser stands for <strong>Simple API</strong> for <strong>XML</strong> . SAX parser parses an XML file <strong>line by line</strong> . It triggers events when it encounters the opening tag, closing tag, and character data in an xml file. SAX parser is also called the <strong>event-based parser</strong> .</p> <p>SAX parser does not load any XML file into memory. It does not create any object representation of the XML document. SAX parser uses call back function to inform clients of the XML document structure. It is <strong>faster</strong> and uses <strong>less memory</strong> than DOM parser.</p> <p>SAX is a <strong>streaming interface</strong> for XML, which means that XML file parses in sequential order starting at the top of the document, and ending with the closing of the root element.</p> <p> <strong>Example of reading XML file using SAX parser</strong> </p> <pre> import javax.xml.parsers.SAXParser; import javax.xml.parsers.SAXParserFactory; import org.xml.sax.Attributes; import org.xml.sax.SAXException; import org.xml.sax.helpers.DefaultHandler; public class ReadXMLFileExample3 { public static void main(String args[]) { try { SAXParserFactory factory = SAXParserFactory.newInstance(); SAXParser saxParser = factory.newSAXParser(); DefaultHandler handler = new DefaultHandler() { boolean id = false; boolean firstname = false; boolean lastname = false; boolean subject = false; boolean marks = false; //parser starts parsing a specific element inside the document public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException { System.out.println(&apos;Start Element :&apos; + qName); if(qName.equalsIgnoreCase(&apos;Id&apos;)) { id=true; } if (qName.equalsIgnoreCase(&apos;FIRSTNAME&apos;)) { firstname = true; } if (qName.equalsIgnoreCase(&apos;LASTNAME&apos;)) { lastname = true; } if (qName.equalsIgnoreCase(&apos;SUBJECT&apos;)) { subject = true; } if (qName.equalsIgnoreCase(&apos;MARKS&apos;)) { marks = true; } } //parser ends parsing the specific element inside the document public void endElement(String uri, String localName, String qName) throws SAXException { System.out.println(&apos;End Element:&apos; + qName); } //reads the text value of the currently parsed element public void characters(char ch[], int start, int length) throws SAXException { if (id) { System.out.println(&apos;ID : &apos; + new String(ch, start, length)); id = false; } if (firstname) { System.out.println(&apos;First Name: &apos; + new String(ch, start, length)); firstname = false; } if (lastname) { System.out.println(&apos;Last Name: &apos; + new String(ch, start, length)); lastname = false; } if (subject) { System.out.println(&apos;Subject: &apos; + new String(ch, start, length)); subject = false; } if (marks) { System.out.println(&apos;Marks : &apos; + new String(ch, start, length)); marks = false; } } }; saxParser.parse(&apos;F:\XMLFile.xml&apos;, handler); } catch (Exception e) { e.printStackTrace(); } } } </pre> <p> <strong>Output:</strong> </p> <pre> Start Element: class Start Element: student Start Element: id ID: 101 End Element: id Start Element: firstname First Name: Naman End Element: firstname Start Element: lastname Last Name: Kumar End Element: lastname Start Element: subject Subject: Math End Element: subject Start Element: marks Marks: 83 End Element: marks End Element: student Start Element: student Start Element: id ID: 102 End Element: id Start Element: firstname First Name: Kapil End Element: firstname Start Element: lastname Last Name: Kumar End Element: lastname Start Element: subject Subject: Chemistry End Element: subject Start Element: marks Marks: 60 End Element: marks End Element: student Start Element: student Start Element: id ID: 103 End Element: id Start Element: firstname First Name: Harsh End Element: firstname Start Element: lastname Last Name: Singh End Element: lastname Start Element: subject Subject: English End Element: subject Start Element: marks Marks: 70 End Element: marks End Element: student Start Element: student Start Element: id ID: 104 End Element: id Start Element: firstname First Name: Jitesh End Element: firstname Start Element: lastname Last Name: Singh End Element: lastname Start Element: subject Subject: Physics End Element: subject Start Element: marks Marks: 76 End Element: marks End Element: student End Element: class </pre> <hr></nodelist.getlength();></pre></nodelist.getlength();>

Laten we nog een voorbeeld bekijken van het lezen van een XML-bestand.

Voorbeeld van het lezen van een XML-bestand met DOM Parser

In het volgende voorbeeld wordt hetzelfde XML-bestand gelezen XML-bestand.xml , en laat zien hoe u het knooppunt één voor één kunt herhalen. Het drukt de knooppuntwaarde, de naam en het eventuele attribuut af.

Voorbeeld

 import java.io.File; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import org.w3c.dom.Document; import org.w3c.dom.NamedNodeMap; import org.w3c.dom.Node; import org.w3c.dom.NodeList; public class ReadXMLFileExample2 { public static void main(String[] args) { try { File file = new File(&apos;F:\XMLFile.xml&apos;); DocumentBuilder documentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder(); Document document = documentBuilder.parse(file); System.out.println(&apos;Root element: &apos;+ document.getDocumentElement().getNodeName()); if (document.hasChildNodes()) { printNodeList(document.getChildNodes()); } } catch (Exception e) { System.out.println(e.getMessage()); } } private static void printNodeList(NodeList nodeList) { for (int count = 0; count <nodelist.getlength(); count++) { node elemnode="nodeList.item(count);" if (elemnode.getnodetype()="=" node.element_node) get name and value system.out.println(\'
node [open]\'); system.out.println(\'node content=" + elemNode.getTextContent()); if (elemNode.hasAttributes()) { NamedNodeMap nodeMap = elemNode.getAttributes(); for (int i = 0; i &lt; nodeMap.getLength(); i++) { Node node = nodeMap.item(i); System.out.println(" attr : \' + node.getnodename()); system.out.println(\'attr node.getnodevalue()); } (elemnode.haschildnodes()) recursive call the has child nodes printnodelist(elemnode.getchildnodes()); [close]\'); < pre> <p> <strong>Output:</strong> </p> <pre> Root element: class Node Name =class [OPEN] Node Content = 101 Naman Kumar Maths 83 102 Kapil Kumar Chemistry 60 103 Harsh Singh English 70 104 Jitesh Singh Physics 76 Node Name =student [OPEN] Node Content = 101 Naman Kumar Maths 83 Node Name =id [OPEN] Node Content =101 Node Name =id [CLOSE] Node Name =firstname [OPEN] Node Content =Naman Node Name =firstname [CLOSE] Node Name =lastname [OPEN] Node Content =Kumar Node Name =lastname [CLOSE] Node Name =subject [OPEN] Node Content =Math Node Name =subject [CLOSE] Node Name =marks [OPEN] Node Content =83 Node Name =marks [CLOSE] Node Name =student [CLOSE] Node Name =student [OPEN] Node Content = 102 Kapil Kumar Chemistry 60 Node Name =id [OPEN] Node Content =102 Node Name =id [CLOSE] Node Name =firstname [OPEN] Node Content =Kapil Node Name =firstname [CLOSE] Node Name =lastname [OPEN] Node Content =Kumar Node Name =lastname [CLOSE] Node Name =subject [OPEN] Node Content =Chemistry Node Name =subject [CLOSE] Node Name =marks [OPEN] Node Content =60 Node Name =marks [CLOSE] Node Name =student [CLOSE] Node Name =student [OPEN] Node Content = 103 Harsh Singh English 70 Node Name =id [OPEN] Node Content =103 Node Name =id [CLOSE] Node Name =firstname [OPEN] Node Content =Harsh Node Name =firstname [CLOSE] Node Name =lastname [OPEN] Node Content =Singh Node Name =lastname [CLOSE] Node Name =subject [OPEN] Node Content =English Node Name =subject [CLOSE] Node Name =marks [OPEN] Node Content =70 Node Name =marks [CLOSE] Node Name =student [CLOSE] Node Name =student [OPEN] Node Content = 104 Jitesh Singh Physics 76 Node Name =id [OPEN] Node Content =104 Node Name =id [CLOSE] Node Name =firstname [OPEN] Node Content =Jitesh Node Name =firstname [CLOSE] Node Name =lastname [OPEN] Node Content =Singh Node Name =lastname [CLOSE] Node Name =subject [OPEN] Node Content =Physics Node Name =subject [CLOSE] Node Name =marks [OPEN] Node Content =76 Node Name =marks [CLOSE] Node Name =student [CLOSE] Node Name =class [CLOSE] </pre> <h2>Java SAX Parser</h2> <p>Java SAX parser stands for <strong>Simple API</strong> for <strong>XML</strong> . SAX parser parses an XML file <strong>line by line</strong> . It triggers events when it encounters the opening tag, closing tag, and character data in an xml file. SAX parser is also called the <strong>event-based parser</strong> .</p> <p>SAX parser does not load any XML file into memory. It does not create any object representation of the XML document. SAX parser uses call back function to inform clients of the XML document structure. It is <strong>faster</strong> and uses <strong>less memory</strong> than DOM parser.</p> <p>SAX is a <strong>streaming interface</strong> for XML, which means that XML file parses in sequential order starting at the top of the document, and ending with the closing of the root element.</p> <p> <strong>Example of reading XML file using SAX parser</strong> </p> <pre> import javax.xml.parsers.SAXParser; import javax.xml.parsers.SAXParserFactory; import org.xml.sax.Attributes; import org.xml.sax.SAXException; import org.xml.sax.helpers.DefaultHandler; public class ReadXMLFileExample3 { public static void main(String args[]) { try { SAXParserFactory factory = SAXParserFactory.newInstance(); SAXParser saxParser = factory.newSAXParser(); DefaultHandler handler = new DefaultHandler() { boolean id = false; boolean firstname = false; boolean lastname = false; boolean subject = false; boolean marks = false; //parser starts parsing a specific element inside the document public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException { System.out.println(&apos;Start Element :&apos; + qName); if(qName.equalsIgnoreCase(&apos;Id&apos;)) { id=true; } if (qName.equalsIgnoreCase(&apos;FIRSTNAME&apos;)) { firstname = true; } if (qName.equalsIgnoreCase(&apos;LASTNAME&apos;)) { lastname = true; } if (qName.equalsIgnoreCase(&apos;SUBJECT&apos;)) { subject = true; } if (qName.equalsIgnoreCase(&apos;MARKS&apos;)) { marks = true; } } //parser ends parsing the specific element inside the document public void endElement(String uri, String localName, String qName) throws SAXException { System.out.println(&apos;End Element:&apos; + qName); } //reads the text value of the currently parsed element public void characters(char ch[], int start, int length) throws SAXException { if (id) { System.out.println(&apos;ID : &apos; + new String(ch, start, length)); id = false; } if (firstname) { System.out.println(&apos;First Name: &apos; + new String(ch, start, length)); firstname = false; } if (lastname) { System.out.println(&apos;Last Name: &apos; + new String(ch, start, length)); lastname = false; } if (subject) { System.out.println(&apos;Subject: &apos; + new String(ch, start, length)); subject = false; } if (marks) { System.out.println(&apos;Marks : &apos; + new String(ch, start, length)); marks = false; } } }; saxParser.parse(&apos;F:\XMLFile.xml&apos;, handler); } catch (Exception e) { e.printStackTrace(); } } } </pre> <p> <strong>Output:</strong> </p> <pre> Start Element: class Start Element: student Start Element: id ID: 101 End Element: id Start Element: firstname First Name: Naman End Element: firstname Start Element: lastname Last Name: Kumar End Element: lastname Start Element: subject Subject: Math End Element: subject Start Element: marks Marks: 83 End Element: marks End Element: student Start Element: student Start Element: id ID: 102 End Element: id Start Element: firstname First Name: Kapil End Element: firstname Start Element: lastname Last Name: Kumar End Element: lastname Start Element: subject Subject: Chemistry End Element: subject Start Element: marks Marks: 60 End Element: marks End Element: student Start Element: student Start Element: id ID: 103 End Element: id Start Element: firstname First Name: Harsh End Element: firstname Start Element: lastname Last Name: Singh End Element: lastname Start Element: subject Subject: English End Element: subject Start Element: marks Marks: 70 End Element: marks End Element: student Start Element: student Start Element: id ID: 104 End Element: id Start Element: firstname First Name: Jitesh End Element: firstname Start Element: lastname Last Name: Singh End Element: lastname Start Element: subject Subject: Physics End Element: subject Start Element: marks Marks: 76 End Element: marks End Element: student End Element: class </pre> <hr></nodelist.getlength();>

Java SAX-parser

Java SAX-parser staat voor Eenvoudige API voor XML . SAX-parser parseert een XML-bestand lijn bij lijn . Het activeert gebeurtenissen wanneer het de openingstag, de sluitingstag en tekengegevens in een XML-bestand tegenkomt. SAX-parser wordt ook wel de op gebeurtenissen gebaseerde parser .

SAX-parser laadt geen enkel XML-bestand in het geheugen. Er wordt geen objectrepresentatie van het XML-document gemaakt. SAX-parser gebruikt de call-back-functie om klanten te informeren over de XML-documentstructuur. Het is sneller en toepassingen minder geheugen dan DOM-parser.

SAX is een streaming-interface voor XML, wat betekent dat het XML-bestand in opeenvolgende volgorde wordt geparseerd, beginnend bovenaan het document en eindigend met het sluiten van het hoofdelement.

Voorbeeld van het lezen van een XML-bestand met behulp van de SAX-parser

 import javax.xml.parsers.SAXParser; import javax.xml.parsers.SAXParserFactory; import org.xml.sax.Attributes; import org.xml.sax.SAXException; import org.xml.sax.helpers.DefaultHandler; public class ReadXMLFileExample3 { public static void main(String args[]) { try { SAXParserFactory factory = SAXParserFactory.newInstance(); SAXParser saxParser = factory.newSAXParser(); DefaultHandler handler = new DefaultHandler() { boolean id = false; boolean firstname = false; boolean lastname = false; boolean subject = false; boolean marks = false; //parser starts parsing a specific element inside the document public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException { System.out.println('Start Element :' + qName); if(qName.equalsIgnoreCase('Id')) { id=true; } if (qName.equalsIgnoreCase('FIRSTNAME')) { firstname = true; } if (qName.equalsIgnoreCase('LASTNAME')) { lastname = true; } if (qName.equalsIgnoreCase('SUBJECT')) { subject = true; } if (qName.equalsIgnoreCase('MARKS')) { marks = true; } } //parser ends parsing the specific element inside the document public void endElement(String uri, String localName, String qName) throws SAXException { System.out.println('End Element:' + qName); } //reads the text value of the currently parsed element public void characters(char ch[], int start, int length) throws SAXException { if (id) { System.out.println('ID : ' + new String(ch, start, length)); id = false; } if (firstname) { System.out.println('First Name: ' + new String(ch, start, length)); firstname = false; } if (lastname) { System.out.println('Last Name: ' + new String(ch, start, length)); lastname = false; } if (subject) { System.out.println('Subject: ' + new String(ch, start, length)); subject = false; } if (marks) { System.out.println('Marks : ' + new String(ch, start, length)); marks = false; } } }; saxParser.parse('F:\XMLFile.xml', handler); } catch (Exception e) { e.printStackTrace(); } } } 

Uitgang:

 Start Element: class Start Element: student Start Element: id ID: 101 End Element: id Start Element: firstname First Name: Naman End Element: firstname Start Element: lastname Last Name: Kumar End Element: lastname Start Element: subject Subject: Math End Element: subject Start Element: marks Marks: 83 End Element: marks End Element: student Start Element: student Start Element: id ID: 102 End Element: id Start Element: firstname First Name: Kapil End Element: firstname Start Element: lastname Last Name: Kumar End Element: lastname Start Element: subject Subject: Chemistry End Element: subject Start Element: marks Marks: 60 End Element: marks End Element: student Start Element: student Start Element: id ID: 103 End Element: id Start Element: firstname First Name: Harsh End Element: firstname Start Element: lastname Last Name: Singh End Element: lastname Start Element: subject Subject: English End Element: subject Start Element: marks Marks: 70 End Element: marks End Element: student Start Element: student Start Element: id ID: 104 End Element: id Start Element: firstname First Name: Jitesh End Element: firstname Start Element: lastname Last Name: Singh End Element: lastname Start Element: subject Subject: Physics End Element: subject Start Element: marks Marks: 76 End Element: marks End Element: student End Element: class