解析Facebook XML查询响应问题
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大家好！ :)
我正在开发一种服务，该服务可以从Facebook API中捕获喜欢，分享等的次数。
但是有一个问题，因为我从fqlResponse.getChild（）得到了一个空指针异常。
在我看来，xmls doctype的自动检测存在问题，因此我手动定义了doctype，但是问题仍然存在。也许facebook的xml文档类型不正确？
这是捕获方法：
public void refreshLikesSharesClicksAndTotal() throws JDOMException, IOException {
URL fqlURL = new URL(\"https://api.facebook.com/method/fql.query?query=select like_count, total_count, share_count, click_count from link_stat where url=\\\"\" + this.url.toString() + \"\\\"\");
Document inputXML = new SAXBuilder().build(fqlURL);
DocType docType = new DocType(\"xml\", \"http://www.w3.org/2001/XMLSchema-instance\");
inputXML.setDocType(docType);
Element fqlResponse = inputXML.getRootElement().getChild(\"link_stat\");
Element likes = fqlResponse.getChild(\"like_count\");
logger.info(\"Likes: \" + likes.getText());
Element shares = fqlResponse.getChild(\"share_count\");
Element clicks = fqlResponse.getChild(\"click_count\");
Element total = fqlResponse.getChild(\"total_count\");
this.likes = Integer.parseInt(likes.getText());
this.shares = Integer.parseInt(shares.getText());
this.clicks = Integer.parseInt(clicks.getText());
this.total = Integer.parseInt(total.getText());
}
没有找到相关结果
已邀请:
2 个回复
弦砂牧扁
public void refreshLikesSharesClicksAndTotal() throws JDOMException, IOException { URL fqlURL = new URL(\"https://api.facebook.com/method/fql.query?query=select%20like_count,%20total_count,%20share_count,%20click_count%20from%20link_stat%20where%20url=%22http://heise.de%22\"); URLConnection openConnection = fqlURL.openConnection(); String contentType = openConnection.getContentType(); Document inputXML = new SAXBuilder().build(fqlURL); DocType docType = new DocType(\"xml\", \"http://www.w3.org/2001/XMLSchema-instance\"); inputXML.setDocType(docType); Element root = inputXML.getRootElement(); Element fqlResponse = root.getChild(\"link_stat\", root.getNamespace()); Element likes = fqlResponse.getChild(\"like_count\", root.getNamespace()); Element shares = fqlResponse.getChild(\"share_count\", root.getNamespace()); Element clicks = fqlResponse.getChild(\"click_count\", root.getNamespace()); Element total = fqlResponse.getChild(\"total_count\", root.getNamespace()); int alikes = Integer.parseInt(likes.getText()); int ashares = Integer.parseInt(shares.getText()); int aclicks = Integer.parseInt(clicks.getText()); int atotal = Integer.parseInt(total.getText()); }担每棱绰
URL url = new URL(\"https://api.facebook.com/method/fql.query?query=select%20like_count,%20total_count,%20share_count,%20click_count%20from%20link_stat%20where%20url=%22http://heise.de%22\"); DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance(); domFactory.setNamespaceAware(true); Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(url.openStream()); XPath xPath = XPathFactory.newInstance().newXPath(); int likeCount = Integer.parseInt(xPath.evaluate(\"//like_count/text()\", doc)); int totalCount = Integer.parseInt(xPath.evaluate(\"//total_count/text()\", doc)); int shareCount = Integer.parseInt(xPath.evaluate(\"//share_count/text()\", doc)); int clickCount = Integer.parseInt(xPath.evaluate(\"//click_count/text()\", doc));