Using a for loop to add nodes using DOM to an XML

Question

Okay so I have a program that asks for a number of people. Then, for each person it asks the collar of: shirt and paints. I want java to put all this information into an XML using DOM.

Here is what I have so far:

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

public class calcWithMem {
    public static void main(String[] args) throws Exception{
        System.out.println("Program launched");
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
        Document doc = builder.newDocument();
        Element root = doc.createElement("People");
        doc.appendChild(root);
        System.out.print("Number of people: ");
        String in = bf.readLine();
        int ppl = Integer.parseInt(in);
        String[] pants = new String[ppl];
        String[] shirt = new String[ppl];
        for (int i=0;i<ppl;i++) {
                    //So what I want is for here to add a new node to the root called "Person 1, Person2, ... etc.)
            System.out.print("Colour of PANTS for person #" + String.valueOf(i+1) + ": ");
            in = bf.readLine();
            pants[i] = in;
                    //And then have a node added to the person with pants
            System.out.print("Colour of SHIRT for person #" + String.valueOf(i+1) + ": ");
            in = bf.readLine();
            shirt[i] = in;
                    //and one last node added to the person with shirt, after this it repeats for each person
            System.out.println();
        }
        for (int i=0;i<ppl;i++) {
            System.out.println("Person #" + String.valueOf(i+1) + ":");
            System.out.println("    Pants: " + pants[i]);
            System.out.println("    Shirt: " + shirt[i]);
        }
    }
}

And where are you stuck?

MadProgrammer
– MadProgrammer

2012-08-22 02:37:22 +00:00
Commented Aug 22, 2012 at 2:37 — MadProgrammer
– MadProgrammer, Commented Aug 22, 2012 at 2:37

KV Prajapati · Accepted Answer · 2012-08-22 02:43:55Z

1

You can create new elements using doc.createElement

Element person=document.createElement("Person");
person.setAttribute("ID", String.valueOf(i+1)); // to add attribute
Element pantsColor=doc.createElement("PantsColor");
Element shirtColor=doc.createElement("ShirtColor");
pantsColor.appendChild(doc.createTextNode(in));
person.appendChild(pantsColor);
person.appendChild(shirtColor);
root.appendChild(person);
...

and to save the doc,

TransformerFactory transFactory=TransformerFactory.newInstance();
Transformer trans=transFactory.newTransformer();

trans.setOutputProperty(OutputKeys.INDENT, "yes");
trans.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "5");

trans.transform(new DOMSource(doc),new StreamResult("c:\\file.xml"));

answered Aug 22, 2012 at 2:43

KV Prajapati

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1 Comment

Nigh7Sh4de Over a year ago

except instead of setting an attribute, i can use the "String.valueOf(i+1)" in the actual tag where I create the element. Thanks AVD :)

JJ Zabkar · Accepted Answer · 2012-08-22 02:42:27Z

0

How about:

for (int i=0;i<ppl;i++) {
    Element person = root.addElement("Person");
    root.appendChild(person);
    in = bf.readLine();
    pants[i] = in;
    Element pants = person.addElement("pants");
    // [add subelements/attributes to pants]
    in = bf.readLine();
    shirt[i] = in;
    Element shirt = person.addElement("shirt");
    // [add subelements/attributes to shirt]

}

answered Aug 22, 2012 at 2:42

JJ Zabkar

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1 Comment

Nigh7Sh4de Over a year ago

right but then if I have 3 people for example, then I get a root and inside that 3 identical nodes named "Person". What I want is to have <root><Person1>...</person1><person2>..</person2>......</root>

Naidu Ypvs · Accepted Answer · 2012-08-22 02:44:47Z

0

  // Use a Transformer for output
  TransformerFactory tFactory = TransformerFactory.newInstance();
  Transformer transformer = tFactory.newTransformer();

  DOMSource source = new DOMSource(document);
  StreamResult result = new StreamResult(System.out);
  transformer.transform(source, result);

Basically in the above example I used a System.out. You can open a file and write into it. Only after you close it will it actually write out the Xml file.

answered Aug 22, 2012 at 2:44

Naidu Ypvs

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1 Comment

Naidu Ypvs Over a year ago

Okay it looks like you first need to create a root and add elements and after you do that you have to follow the above to actually write out the Xml file. HTH.

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