CODEWITHSUNDEEP
javaxmlxml-parsing
DRastislav
DRastislav

Reputation: 1882

XML parser - how to get values from Nodes

I have question about parsing an XML File. Lets say I have XML file: 

<line>
   <point>
      <X>100</X>
      <Y>100</Y>
   </point>
   <point>
      <X>200</X>
      <Y>200</Y>
   </point>
</line>

and I would like to parse it using DOM:

    DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
    DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
    Document doc = dBuilder.parse(f);
    doc.getDocumentElement().normalize();
    NodeList nList = doc.getElementsByTagName("point");

    for (int temp = 0; temp < nList.getLength(); temp++) {

        Node nNode = nList.item(temp);

        if (nNode.getNodeType() == Node.ELEMENT_NODE) {

            Element eElement = (Element) nNode;

            System.out.println("x: " + eElement.getElementsByTagName("X").item(0).getTextContent());

But - how can i get X and Y from XML file as integers? - first X as x1, first Y as y1 and second X as x2 and second Y as y2 ?

I tried:

int x1 = Integer.valueOf(eElement.getAttribute("X"));
int y1 = Integer.valueOf(eElement.getAttribute("Y"));

but without success

Upvotes: 0

Views: 3126

Answers (1)

acdcjunior
acdcjunior

Reputation: 135862

// Get the <line> element
NodeList nList = doc.getElementsByTagName("line");
Element line = (Element) nList.item(0);

// Get each <point> element from the <line>
Element point1 = (Element) line.getElementsByTagName("point").item(0);
Element point2 = (Element) line.getElementsByTagName("point").item(1);

// Get each <X> and <Y> from each <point> retrieved before
Integer x1 = Integer.parseInt(point1.getElementsByTagName("X").item(0).getTextContent());
Integer y1 = Integer.parseInt(point1.getElementsByTagName("Y").item(0).getTextContent());
Integer x2 = Integer.parseInt(point2.getElementsByTagName("X").item(0).getTextContent());
Integer y2 = Integer.parseInt(point2.getElementsByTagName("Y").item(0).getTextContent());

The whole code:

DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(f);
doc.getDocumentElement().normalize();

NodeList nList = doc.getElementsByTagName("line");

Element line = (Element) nList.item(0);

Element point1 = (Element) line.getElementsByTagName("point").item(0);
Element point2 = (Element) line.getElementsByTagName("point").item(1);

Integer x1 = Integer.parseInt(point1.getElementsByTagName("X").item(0).getTextContent());
Integer y1 = Integer.parseInt(point1.getElementsByTagName("Y").item(0).getTextContent());
Integer x2 = Integer.parseInt(point2.getElementsByTagName("X").item(0).getTextContent());
Integer y2 = Integer.parseInt(point2.getElementsByTagName("Y").item(0).getTextContent());

System.out.println("x1: " + x1 + "\ty1: " + y1 + "\tx2: " + x2 + "\ty2: " + y2);

Output:

x1: 100 y1: 100 x2: 200 y2: 200

Upvotes: 2

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