[英]XML parsing in java with xpath
我試圖打印出一些數據,所以我的代碼是
private static final DocumentBuilderFactory DOCUMENT_BUILDER_FACTORY = DocumentBuilderFactory.newInstance();
private static final XPathFactory XPATH_FACTORY = XPathFactory.newInstance();
public void parseXml(String urlPath) throws Exception {
URL url = new URL(urlPath);
URLConnection connection = url.openConnection();
DocumentBuilder db = DOCUMENT_BUILDER_FACTORY.newDocumentBuilder();
final Document document = db.parse(connection.getInputStream());
XPath xPathEvaluator = XPATH_FACTORY.newXPath();
XPathExpression nameExpr = xPathEvaluator.compile("lfm/results/trackmatches/track");
NodeList tracksinfoNodes = (NodeList) nameExpr.evaluate(document, XPathConstants.NODESET);
for (int i = 0; i < tracksinfoNodes.getLength(); i++) {
Node trackNameNode = tracksinfoNodes.item(i);
System.out.println(String.format("Track Name: %s" , trackNameNode.getTextContent()));
}
}
因此它會在第一個循環中打印出來
Track Name:
I Believe in You
Neil Young
http://www.last.fm/music/Neil+Young/_/I+Believe+in+You
0
90540
http://userserve-ak.last.fm/serve/34s/65285990.png
http://userserve-ak.last.fm/serve/64s/65285990.png
http://userserve-ak.last.fm/serve/126/65285990.png
http://userserve-ak.last.fm/serve/300x300/65285990.png
所以我要做的就是讓eveyone獨自一人,就像這樣
song : I Believe in You
artist :Neil Young
link : http://www.last.fm/music/Neil+Young/_/I+Believe+in+You
something: 0
views: 90540
linkimg : http://userserve-ak.last.fm/serve/34s/65285990.png
..
..
嘗試這樣的事情:
private static final DocumentBuilderFactory DOCUMENT_BUILDER_FACTORY = DocumentBuilderFactory.newInstance();
private static final XPathFactory XPATH_FACTORY = XPathFactory.newInstance();
public static void parseXml(String urlPath) throws Exception {
URL url = new URL(urlPath);
URLConnection connection = url.openConnection();
DocumentBuilder db = DOCUMENT_BUILDER_FACTORY.newDocumentBuilder();
final Document document = db.parse(connection.getInputStream());
XPath xPathEvaluator = XPATH_FACTORY.newXPath();
NodeList tracksinfoNodes = (NodeList) xPathEvaluator.compile("lfm/results/trackmatches/track").evaluate(
document, XPathConstants.NODESET);
for (int i = 0; i < tracksinfoNodes.getLength(); i++) {
Node trackNameNode = tracksinfoNodes.item(i);
NodeList childs = trackNameNode.getChildNodes();
for (int j = 0; j < childs.getLength(); j++) {
Node n = childs.item(j);
if (!n.getNodeName().equals("#text")) {
System.out.println(String.format("%s: %s", n.getNodeName(), n.getTextContent()));
}
}
System.out.println("==============");
}
}
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