package net.viralpatel.java.xmlparser;

import java.io.File;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;

import org.w3c.dom.Element;

import org.w3c.dom.Node;

import org.w3c.dom.NodeList;

public class XMLParser {public void getAllUserNames\(String fileName\) {  

    try {  

        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance\(\);  

        DocumentBuilder db = dbf.newDocumentBuilder\(\);  

        File file = new File\(fileName\);  

        if \(file.exists\(\)\) {  

            Document doc = db.parse\(file\);  

            Element docEle = doc.getDocumentElement\(\);  



            // Print root element of the document  

            System.out.println\("Root element of the document: " 

                    + docEle.getNodeName\(\)\);  



            NodeList studentList = docEle.getElementsByTagName\("student"\);  



            // Print total student elements in document  

            System.out  

                    .println\("Total students: " + studentList.getLength\(\)\);  



            if \(studentList != null && studentList.getLength\(\) > 0\) {  

                for \(int i = 0; i < studentList.getLength\(\); i++\) {  



                    Node node = studentList.item\(i\);  



                    if \(node.getNodeType\(\) == Node.ELEMENT\_NODE\) {  



                        System.out  

                                .println\("====================="\);  



                        Element e = \(Element\) node;  

                        NodeList nodeList = e.getElementsByTagName\("name"\);  

                        System.out.println\("Name: " 

                                + nodeList.item\(0\).getChildNodes\(\).item\(0\)  

                                        .getNodeValue\(\)\);  



                        nodeList = e.getElementsByTagName\("grade"\);  

                        System.out.println\("Grade: " 

                                + nodeList.item\(0\).getChildNodes\(\).item\(0\)  

                                        .getNodeValue\(\)\);  



                        nodeList = e.getElementsByTagName\("age"\);  

                        System.out.println\("Age: " 

                                + nodeList.item\(0\).getChildNodes\(\).item\(0\)  

                                        .getNodeValue\(\)\);  

                    }  

                }  

            } else {  

                System.exit\(1\);  

            }  

        }  

    } catch \(Exception e\) {  

        System.out.println\(e\);  

    }  

}  

public static void main\(String\[\] args\) {  



    XMLParser parser = new XMLParser\(\);  

    parser.getAllUserNames\("c:\\test.xml"\);  

}
}