jsoup: Java HTML parser that makes sense of real-world HTML soup. jsoup is a Java library for working with real-world HTML. It provides a very convenient API for extracting and manipulating data, using the best of DOM, CSS, and jquery-like methods. jsoup implements the WHATWG HTML5 specification (http://whatwg.org/html), and parses HTML to the same DOM as modern browsers do. * parse HTML from a URL, file, or string * find and extract data, using DOM traversal or CSS selectors * manipulate the HTML elements, attributes, and text * clean user-submitted content against a safe white-list, to prevent XSS * output tidy HTML jsoup is designed to deal with all varieties of HTML found in the wild; from pristine and validating, to invalid tag-soup; jsoup will create a sensible parse tree. See http://jsoup.org/ for downloads and documentation. fork from jhy/jsoup 1.7.3 会加入一些自己对代码的理解和注释