[英]XML parser - how to get values from Nodes
我對解析XML文件有疑問。 可以說我有XML文件:
<line>
<point>
<X>100</X>
<Y>100</Y>
</point>
<point>
<X>200</X>
<Y>200</Y>
</point>
</line>
我想使用DOM
解析它:
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());
但是-如何從XML文件中獲取X和Y為整數? -第一X為x1,第一Y為y1,第二X為x2,第二Y為y2?
我試過了:
int x1 = Integer.valueOf(eElement.getAttribute("X"));
int y1 = Integer.valueOf(eElement.getAttribute("Y"));
但沒有成功
// 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());
整個代碼:
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);
輸出:
x1: 100 y1: 100 x2: 200 y2: 200
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