Thread: XML DOM Parser problem

I have written the following java code for an XML Parser :

import org.w3c.dom.*; import javax.xml.parsers.*; import java.io.*; import javax.xml.transform.*; import javax.xml.transform.dom.*; import javax.xml.transform.stream.*;   public class XMLParser {	int i, j;	private final static String xmlFileName = "/home/kanishk/Desktop/SE/mini proj/sample.xml";	public void XMLSearch()	{	try{	System.out.println("sapsap");	File file = new File(xmlFileName);	int flag = 0;	if (file.exists())	{	DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();	DocumentBuilder parser = factory.newDocumentBuilder();	Document doc = parser.parse(xmlFileName);	BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));	System.out.print("Enter search data: ");	String str = bf.readLine();	NodeList nl = doc.getElementsByTagName("*");	for(i=0;i<nl.getLength();i++)	{	if(nl.item(i).hasChildNodes())	{	if(nl.item(i).hasAttributes())	{	NamedNodeMap nnm = nl.item(i).getAttributes();	for(j=0;j<nnm.getLength();j++)	{	Attr a = (Attr)nnm.item(j);	if(str.equals(a.getValue()))	{	System.out.println("Search Data found");	flag = 1;	}	}	}	Node ch;	for(ch=nl.item(i).getFirstChild();ch!=null;ch=ch.getNextSibling())	{	if(ch.getNodeType()==Node.TEXT_NODE || ch.getNodeType()==Node.ATTRIBUTE_NODE)	{	if(ch.getNodeType()==Node.TEXT_NODE)	{	if(str.equals(ch.getNodeValue()))	{	System.out.println("Search Data found");	flag = 1;	}	}	}	}	}	}	if(flag==0)	System.out.println("Data Not Found");	}	else	System.out.println("File doesnt exist");	}	catch(Exception e){	System.out.println(e);}	}	public void XMLModify(int k)	{	try{	File file = new File(xmlFileName);	if (file.exists())	{	if(k==1)	{	DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();	DocumentBuilder parser = factory.newDocumentBuilder();	Document doc = parser.parse(xmlFileName);	BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));	System.out.println("Enter parent node: ");	String str = bf.readLine();	BufferedReader bf1 = new BufferedReader(new InputStreamReader(System.in));	System.out.println("Enter element name: ");	String str1 = bf1.readLine();	bf1 = new BufferedReader(new InputStreamReader(System.in));	System.out.println("Give an element value(yes or no)?: ");	String str2 = bf1.readLine();	Node n1 = doc.createElement(str1);	NodeList nl = doc.getElementsByTagName(str);	for(j=0;j<nl.getLength();j++)	{	nl.item(j).appendChild(n1);	if(str2.equals("yes"))	{	bf1 = new BufferedReader(new InputStreamReader(System.in));	System.out.println("Enter element value: ");	String str3 = bf1.readLine();	Text txt = doc.createTextNode(str3);	n1.appendChild(txt);	}	}	storedata(doc);	}	if(k==2)	{	DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();	DocumentBuilder parser = factory.newDocumentBuilder();	Document doc = parser.parse(xmlFileName);	BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));	System.out.println("Enter attribute node: ");	String str = bf.readLine();	BufferedReader bf2 = new BufferedReader(new InputStreamReader(System.in));	System.out.println("Enter attribute value: ");	String str2 = bf2.readLine();	BufferedReader bf1 = new BufferedReader(new InputStreamReader(System.in));	System.out.print("Enter element name to which attribute should be added: ");	String str1 = bf1.readLine();	NodeList nl = doc.getElementsByTagName(str1);	for(j=0;j<nl.getLength();j++)	{	Element e = (Element)nl.item(j);	e.setAttribute(str,str2);	}	storedata(doc);	}	if(k==3)	{	Node n;	DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();	DocumentBuilder parser = factory.newDocumentBuilder();	Document doc = parser.parse(xmlFileName);	BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));	System.out.println("Enter element to be replaced: ");	String str = bf.readLine();	BufferedReader bf1 = new BufferedReader(new InputStreamReader(System.in));	System.out.print("Enter new element: ");	String str1 = bf1.readLine();	bf1 = new BufferedReader(new InputStreamReader(System.in));	System.out.println("Give an element value(yes or no)?: ");	String str2 = bf1.readLine();	n = doc.createElement(str1);	//Element e = doc.createElement(str);	NodeList nl = doc.getElementsByTagName(str);	for(j=0;j<nl.getLength();j++)	{	Node n1 = nl.item(j).getParentNode();	n1.removeChild(nl.item(j));	Node n2 = n1.appendChild(n);	if(str2.equals("yes"))	{	bf1 = new BufferedReader(new InputStreamReader(System.in));	System.out.println("Enter element value: ");	String str3 = bf1.readLine();	Text txt = doc.createTextNode(str3);	n2.appendChild(txt);	}  	}	storedata(doc);	}	if(k==4)	{	DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();	DocumentBuilder parser = factory.newDocumentBuilder();	Document doc = parser.parse(xmlFileName);	BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));	System.out.println("Enter attribute to be replaced: ");	String str = bf.readLine();	BufferedReader bf1 = new BufferedReader(new InputStreamReader(System.in));	System.out.print("Enter new attribute: ");	String str1 = bf1.readLine();	BufferedReader bf2 = new BufferedReader(new InputStreamReader(System.in));	System.out.print("Enter new attribute value: ");	String str2 = bf2.readLine();	NodeList nl = doc.getElementsByTagName("*");	for(j=0;j<nl.getLength();j++)	{	Element e = (Element)nl.item(j);	if(e.hasAttribute(str))	{	e.removeAttribute(str);	e.setAttribute(str1,str2);	}	}	storedata(doc);	}	if(k==5)	{	Node n;	DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();	DocumentBuilder parser = factory.newDocumentBuilder();	Document doc = parser.parse(xmlFileName);	BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));	System.out.println("Enter element to be removed: ");	String str = bf.readLine();	NodeList nl = doc.getElementsByTagName(str);	for(j=0;j<nl.getLength();j++)	{	n = nl.item(j).getParentNode();	if(n!=null)	n.removeChild(nl.item(j));	else	System.out.println("Element not present in file");	}	storedata(doc);	}	if(k==6)	{	DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();	DocumentBuilder parser = factory.newDocumentBuilder();	Document doc = parser.parse(xmlFileName);	BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));	System.out.println("Enter attribute to be removed: ");	String str = bf.readLine();	NodeList nl = doc.getElementsByTagName("*");	for(j=0;j<nl.getLength();j++)	{	Element e = (Element)nl.item(j);	if(e.hasAttribute(str))	e.removeAttribute(str);	}	storedata(doc);	}	if(k==7)	{	DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();	DocumentBuilder parser = factory.newDocumentBuilder();	Document doc = parser.parse(xmlFileName);	BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));	System.out.println("Enter element whose value is to be updated: ");	String str = bf.readLine();	BufferedReader bf1 = new BufferedReader(new InputStreamReader(System.in));	System.out.print("Enter new value: ");	String str1 = bf1.readLine();	NodeList nl = doc.getElementsByTagName(str);	for(j=0;j<nl.getLength();j++)	{	if(nl.item(j).hasChildNodes())	{	NodeList nl1 = nl.item(j).getChildNodes();	for(i=0;i<nl1.getLength();i++)	{	if(nl1.item(i).getNodeType()==Node.TEXT_NODE);	nl1.item(i).setNodeValue(str1);	}	}	else	System.out.println("Element has no value");	}	storedata(doc);	}	if(k==8)	{	DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();	DocumentBuilder parser = factory.newDocumentBuilder();	Document doc = parser.parse(xmlFileName);	BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));	System.out.println("Enter attribute whose value is to be updated: ");	String str = bf.readLine();	BufferedReader bf1 = new BufferedReader(new InputStreamReader(System.in));	System.out.print("Enter new value: ");	String str1 = bf1.readLine();	NodeList nl = doc.getElementsByTagName("*");	for(j=0;j<nl.getLength();j++)	{	Element e = (Element)nl.item(j);	if(e.hasAttribute(str))	{	e.removeAttribute(str);	e.setAttribute(str,str1);	}	}	storedata(doc);	}	}	}	catch(Exception e){	System.out.println(e);}	}	private String nodevalue(Node n)	{	Node ch;	if(n!=null)	{	if (n.hasChildNodes())	{	for(ch = n.getFirstChild();ch != null;ch = ch.getNextSibling())	{	if(ch.getNodeType() == Node.TEXT_NODE)	return ch.getNodeValue();	}	}	}	return "";	}	public void XMLDisplay(Node n,int in)	{	File file = new File(xmlFileName);	if (file.exists())	{	String nn = n.getNodeName();	String str = nodevalue(n);	NamedNodeMap nnm = n.getAttributes();	System.out.println(indentspc(in) + "NodeName: " + nn + ", NodeValue: " + str);	if(nnm!=null)	{	for (int i = 0; i < nnm.getLength(); i++)	{	Node n1 = nnm.item(i);	System.out.println(indentspc(in + 2) + "AttributeName: " + n1.getNodeName() + ", attributeValue: " + n1.getNodeValue());	}	}	if(n.hasChildNodes())	{	NodeList ch = n.getChildNodes();	for (int i = 0; i < ch.getLength(); i++)	{	Node ch1 = ch.item(i);	if (ch1.getNodeType() == Node.ELEMENT_NODE)	XMLDisplay(ch1,in + 2);	}	}	}	else	System.out.println("File doesnt exist");	}	private String indentspc(int in)	{	StringBuffer buffer = new StringBuffer();	for (int i = 0; i < in; i++)	buffer.append(" ");	return buffer.toString();	}	private void storedata(Document doc)	{	try{	TransformerFactory trans = TransformerFactory.newInstance();	Transformer t = trans.newTransformer();	//StringWriter sw = new StringWriter();	//StreamResult r = new StreamResult(sw);	Node n = doc.getDocumentElement();	Source src = new DOMSource(n);	Result dest = new StreamResult(System.out);	t.transform(src, dest);	/*DOMSource s = new DOMSource(doc);	t.transform(s,r);	String str = sw.toString();	OutputStream f;	byte buf[] = str.getBytes();	f = new FileOutputStream("connections.xml");	for(int i=0;i<buf.length;i++)	f.write(buf[i]);	f.close();	buf = null;*/	}	catch(Exception e){	System.out.println(e);}	}	public XMLParser()	{	try{	int x;	System.out.println("1. Search for data in XML file");	System.out.println("2. Modify data in XML file");	System.out.println("3. Display contents of XML file");	BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));	System.out.print("Choose one of the three possibilities(1, 2, 3) : ");	x = Integer.parseInt(bf.readLine());	if(x==1)	XMLSearch();	if(x==2)	{	int y;	System.out.println("1. Add Element");	System.out.println("2. Add Attribute");	System.out.println("3. Replace Element");	System.out.println("4. Replace Attribute");	System.out.println("5. Remove Element");	System.out.println("6. Remove Attribute");	System.out.println("7. Modify Element Value(If value present)");	System.out.println("8. Modify Attribute Value");	bf = new BufferedReader(new InputStreamReader(System.in));	System.out.println("Choose one of the given modification possibilities(1, 2, 3, 4, 5, 6, 7, 8) : ");	y = Integer.parseInt(bf.readLine());	switch(y)	{	case 1: XMLModify(1);break;	case 2: XMLModify(2);break;	case 3: XMLModify(3);break;	case 4: XMLModify(4);break;	case 5: XMLModify(5);break;	case 6: XMLModify(6);break;	case 7: XMLModify(7);break;	case 8: XMLModify(8);break;	default: System.out.println("Invalid Selection");break;	}	}	if(x==3)	{	DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();	DocumentBuilder parser = factory.newDocumentBuilder();	Document doc = parser.parse(xmlFileName);	Node root = doc.getDocumentElement();	XMLDisplay(root,0);	}	}	catch(Exception e){	System.out.println("sasasaas123");	System.out.println(e);}	}	public static void main(String args[])	{	new XMLParser();	} }

and iam parsing the following xml file :

<?xml version="1.0"?> <catalog> <product description="Cardigan Sweater" product_image="cardigan.jpg"> <catalog_item gender="Men's"> <item_number>QWZ5671</item_number> <price>39.95</price> <size description="Medium"> <color_swatch image="red_cardigan.jpg">Red</color_swatch> <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch> </size> <size description="Large"> <color_swatch image="red_cardigan.jpg">Red</color_swatch> <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch> </size> </catalog_item> <catalog_item gender="Women's"> <item_number>RRX9856</item_number> <price>42.50</price> <size description="Small"> <color_swatch image="red_cardigan.jpg">Red</color_swatch> <color_swatch image="navy_cardigan.jpg">Navy</color_swatch> <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch> </size> <size description="Medium"> <color_swatch image="red_cardigan.jpg">Red</color_swatch> <color_swatch image="navy_cardigan.jpg">Navy</color_swatch> <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch> <color_swatch image="black_cardigan.jpg">Black</color_swatch> </size> <size description="Large"> <color_swatch image="navy_cardigan.jpg">Navy</color_swatch> <color_swatch image="black_cardigan.jpg">Black</color_swatch> </size> <size description="Extra Large"> <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch> <color_swatch image="black_cardigan.jpg">Black</color_swatch> </size> </catalog_item> </product> </catalog>

and when iam trying to modify the file(by adding the element color_divide with the value yes and parent node as color_swatch) iam getting the following file as output :

<?xml version="1.0"?> <catalog> <product description="Cardigan Sweater" product_image="cardigan.jpg"> <catalog_item gender="Men&apos;s"> <item_number>QWZ5671</item_number> <price>39.95</price> <size description="Medium"> <color_swatch image="red_cardigan.jpg">Red</color_swatch> <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch> </size> <size description="Large"> <color_swatch image="red_cardigan.jpg">Red</color_swatch> <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch> </size> </catalog_item> <catalog_item gender="Women&apos;s"> <item_number>RRX9856</item_number> <price>42.50</price> <size description="Small"> <color_swatch image="red_cardigan.jpg">Red</color_swatch> <color_swatch image="navy_cardigan.jpg">Navy</color_swatch> <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch> </size> <size description="Medium"> <color_swatch image="red_cardigan.jpg">Red</color_swatch> <color_swatch image="navy_cardigan.jpg">Navy</color_swatch> <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch> <color_swatch image="black_cardigan.jpg">Black</color_swatch> </size> <size description="Large"> <color_swatch image="navy_cardigan.jpg">Navy</color_swatch> <color_swatch image="black_cardigan.jpg">Black</color_swatch> </size> <size description="Extra Large"> <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch> <color_swatch image="black_cardigan.jpg">Black<color_divide>yesyesyesyesyesyesyesyesyesyesyesyesyesyes</color_divide></color_swatch> </size> </catalog_item> </product> </catalog>

please help me out here.........i want color_divide to be added to each instance of color_swatch ........not only to the last one.........and with only 1 yes as the value each time.......