Read XML in java

Hi Deepak, I want to read a xml file which have only one element with multiple attributes with same tag name.
here is my file
<employee>
<firstname>Tom</firstname>
<lastname>Cruise</lastname>
<firstname>joil</firstname>
<lastname>Enderson</lastname>
<firstname>George</firstname>
<lastname>Bush</lastname>
<firstname>prashant</firstname>
<lastname>nikumbh</lastname>
</employee>
i tried to solve the problem but failed.the program which i hav developed shows only first record ie. only Tom Cruise.
please give me a solution.my java code is given below.
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;

class XMLReader {

public static void main(String argv[]) {

try {
File file = new File("MyXMLFile.xml");
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(file);
doc.getDocumentElement().normalize();
System.out.println("Root element " + doc.getDocumentElement().getNodeName());
NodeList nodeLst = doc.getElementsByTagName("employee");
System.out.println("Information of all employees");

for (int s = 0; s < nodeLst.getLength(); s++)
{
Node fstNode = nodeLst.item(s);
Node lstNode = nodeLst.item(s);
if (fstNode.getNodeType() == Node.ELEMENT_NODE)
{
Element fstElmnt = (Element) fstNode;
Element lstElmnt = (Element) lstNode;
NodeList fstNmElmntLst = fstElmnt.getElementsByTagName("firstname");
for(int i=0;i< fstNmElmntLst.getLength();i++)
{
Element fstNmElmnt = (Element) fstNmElmntLst.item(0);
NodeList fstNm = fstNmElmnt.getChildNodes();
System.out.println("First Name : " + ((Node) fstNm.item(0)).getNodeValue());
}

NodeList lstNmElmntLst = lstElmnt.getElementsByTagName("lastname");
for(int j=0;j< lstNmElmntLst.getLength();j++)
{
Element lstNmElmnt = (Element) lstNmElmntLst.item(0);
NodeList lstNm = lstNmElmnt.getChildNodes();
System.out.println("Last Name : " + ((Node) lstNm.item(0)).getNodeValue());
}

}

}
} catch (Exception e) {
e.printStackTrace();
}
}
}

Thanks,
Prashant.

View Answers

July 21, 2010 at 10:46 AM

Hi Friend,

Try the following code:

import java.io.*;
import org.w3c.dom.*;
import javax.xml.parsers.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.*;
import javax.xml.transform.stream.*;

public class DOMParserExample{
public final static String getElementValue( Node elem ) {
Node node;
if( elem != null){
if (elem.hasChildNodes()){
for( node = elem.getFirstChild(); node != null; node = node.getNextSibling()){
if( node.getNodeType() == Node.TEXT_NODE){
return node.getNodeValue();
}
}
}
}
return "";
}
public static void retrieveValue(Node node,int index) {
String nodeName = node.getNodeName();
String nodeValue=getElementValue(node);
StringBuffer buffer = new StringBuffer();
for (int i = 0; i < 1; i++) {
buffer.append(" ");
}
System.out.println(nodeName + " = " + nodeValue);
NodeList children = node.getChildNodes();
for (int i = 1; i < children.getLength(); i++) {
Node child = children.item(i);

if (child.getNodeType() == Node.ELEMENT_NODE) {
retrieveValue(child,index + 2);
}
}
}
public static void main(String[] args) throws Exception {
File f=new File("C:/employee.xml");
DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder=docBuilderFactory.newDocumentBuilder();
Document doc = docBuilder.parse(f);
Node root = doc.getDocumentElement();
retrieveValue(root,0);
}
}

Thanks