How to compare after parsing xml file

Question

Hi,
following code, parse the input.xml file, counts how many nodes are there and writes the node name and its value on screen.
1) i am having trouble writing only node name into another file instead of writing to screen.
2) after parsing, i like to compare each node name with another .xsd file for existence.
Please keep in mind that, input.xml is based on some other .xsd and after parsing i have comparing its tag with another .xsd
Need you help guys.
thanks
* CompareTags.java
import java.io.*;
import org.w3c.dom.*;
import org.xml.sax.*;
import javax.xml.parsers.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.*;
import javax.xml.transform.stream.*;
/** This class represents short example how to parse XML file,
* get XML nodes values and its values.<br><br>
* It implements method to save XML document to XML file too
public class CompareTags {
private final static String xmlFileName = "C:/input.xml";
     int totalelements = 0;
/** Creates a new instance of ParseXMLFile */
public CompareTags() {
// parse XML file -> XML document will be build
Document doc = parseFile(xmlFileName);
// get root node of xml tree structure
Node root = doc.getDocumentElement();
// write node and its child nodes into System.out
System.out.println("Statemend of XML document...");
writeDocumentToOutput(root,0);
               System.out.println("totalelements in xyz tag " + totalelements);
          System.out.println("... end of statement");
/** Returns element value
* @param elem element (it is XML tag)
* @return Element value otherwise empty String
public final static String getElementValue( Node elem ) {
Node kid;
if( elem != null){
if (elem.hasChildNodes()){
for( kid = elem.getFirstChild(); kid != null; kid = kid.getNextSibling() ){
if( kid.getNodeType() == Node.TEXT_NODE ){
return kid.getNodeValue();
return "";
private String getIndentSpaces(int indent) {
StringBuffer buffer = new StringBuffer();
for (int i = 0; i < indent; i++) {
buffer.append(" ");
return buffer.toString();
/** Writes node and all child nodes into System.out
* @param node XML node from from XML tree wrom which will output statement start
* @param indent number of spaces used to indent output
public void writeDocumentToOutput(Node node,int indent) {
// get element name
String nodeName = node.getNodeName();
// get element value
String nodeValue = getElementValue(node);
// get attributes of element
NamedNodeMap attributes = node.getAttributes();
System.out.println(getIndentSpaces(indent) + "NodeName: " + nodeName + ", NodeValue: " + nodeValue);
for (int i = 0; i < attributes.getLength(); i++) {
Node attribute = attributes.item(i);
System.out.println(getIndentSpaces(indent + 2) + "AttributeName: " + attribute.getNodeName() + ", attributeValue: " + attribute.getNodeValue());
// write all child nodes recursively
NodeList children = node.getChildNodes();
          //int totalelements = 0;
for (int i = 0; i < children.getLength(); i++) {
Node child = children.item(i);
               //     System.out.println("child value.."+child);
if (child.getNodeType() == Node.ELEMENT_NODE) {
writeDocumentToOutput(child,indent + 2);
                         if(node.getNodeName() == "DATA"){
                         totalelements = totalelements+1;}
                    //System.out.println("totalelements in DATA tag " + totalelements);
/** Parses XML file and returns XML document.
* @param fileName XML file to parse
* @return XML document or <B>null</B> if error occured
public Document parseFile(String fileName) {
System.out.println("Parsing XML file... " + fileName);
DocumentBuilder docBuilder;
Document doc = null;
DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
docBuilderFactory.setIgnoringElementContentWhitespace(true);
try {
docBuilder = docBuilderFactory.newDocumentBuilder();
catch (ParserConfigurationException e) {
System.out.println("Wrong parser configuration: " + e.getMessage());
return null;
File sourceFile = new File(fileName);
try {
doc = docBuilder.parse(sourceFile);
catch (SAXException e) {
System.out.println("Wrong XML file structure: " + e.getMessage());
return null;
catch (IOException e) {
System.out.println("Could not read source file: " + e.getMessage());
System.out.println("XML file parsed");
return doc;
/** Starts XML parsing example
* @param args the command line arguments
public static void main(String[] args) {
new CompareTags();
}

Answer 1

hi,
check out the following links
Check this blog to extract from XML:
/people/kamaljeet.kharbanda/blog/2005/09/16/xi-bi-integration
http://help.sap.com/saphelp_nw04/helpdata/en/fe/65d03b3f34d172e10000000a11402f/frameset.htm
Check thi link for Extract from any DB:
http://help.sap.com/saphelp_nw04s/helpdata/en/58/54f9c1562d104c9465dabd816f3f24/content.htm
regards
harikrishna N