帮助Java Swing HTML解析

Question

我正在使用Java Swing HTML解析库解析HTML文档的集合，并且试图隔离<title>标签之间的文本，以便可以使用它们来标识文档，但是由于handleStartTag ，我很难做到这handleStartTag方法无权访问标签内的文本

Answer 1

You can use XPath to pull out data from HTML:

String html = //...

//read the HTML into a DOM
StreamSource source = new StreamSource(new StringReader(html));
DOMResult result = new DOMResult();
Transformer transformer = TransformerFactory.newInstance().newTransformer();
transformer.transform(source, result);
Node root = result.getNode();

//use XPath to get the title
XPath xpath = XPathFactory.newInstance().newXPath();
String title = xpath.evaluate("/html/title", root);

However, the HTML must be well formed XHTML for this to work. For example, the "<br>" tag is valid in HTML, but is invalid in XHTML because it is not closed. It must be "<br />" to be valid in XHTML.