Nextzy Technologies Co.,ltd. Jsoup
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This document introduces Jsoup, an open source Java library for working with real-world HTML. It provides convenient methods for scraping and parsing HTML content from URLs, files or strings. Jsoup allows selecting elements using DOM traversal or CSS selectors, extracting and manipulating data from elements, and cleaning user-submitted HTML to prevent XSS attacks. Examples demonstrate how to use Jsoup to parse HTML, select elements, extract attributes and text, and work with URLs.
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![Palakorn Nakphong
Founder: Nextzy Technologies Co.,ltd.
[“Java Programmer”, Fullstack Web Developer, Ruby On Rails Developer];
fb.com/codingz @Codingz th.linkedin.com/in/palakorn](https://image.slidesharecdn.com/nextzyjsoup-150311050115-conversion-gate01/85/Nextzy-Technologies-Co-ltd-Jsoup-1-320.jpg)
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The document provides a history of HTML and describes new features in HTML5 such as improved audio/video support, 2D/3D canvas, web storage, geolocation, and web workers. Key events include Tim Berners-Lee proposing HTML in 1989 at CERN and the formation of the WHATWG in 2004 to advance HTML standards in response to the W3C shifting focus away from HTML. HTML5 aims to improve compatibility while introducing new APIs for web applications.
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Nextzy Technologies Co.,ltd. Jsoup
- 1. Palakorn Nakphong Founder: Nextzy Technologies Co.,ltd. [“Java Programmer”, Fullstack Web Developer, Ruby On Rails Developer]; fb.com/codingz @Codingz th.linkedin.com/in/palakorn
- 2. Jsoup Java HTML Parser Jsoup is an open source Java library for working with real-world HTML. It provides a very convenient API fb.com/codingz @Codingz th.linkedin.com/in/palakorn
- 5. How to get data in tag?
- 6. Regular expression is F*uk String expr = "<td><spans+class="flagicon"[^>]*>" + ".*?</span><a href="" + "([^"]+)" // first piece of data goes up to quote + ""[^>]*>" // end quote, then skip to end of tag + "([^<]+)" // name is data up to next tag + "</a>.*?</td>"; // end a tag, then skip to the td close tag
- 8. Using Jsoup <dependency> <groupId>org.jsoup</groupId> <artifactId>jsoup</artifactId> <version>1.8.1</version> </dependency> fb.com/codingz @Codingz th.linkedin.com/in/palakorn
- 10. • Jsoup can scrape and parse HTML from a URL, file, or string • Jsoup can find and extract data, using DOM traversal or CSS selectors • Jsoup allows you to manipulate the HTML elements, attributes, and text • Jsoup provides clean user-submitted content against a safe white-list, to prevent XSS attacks • Jsoup also output tidy HTML fb.com/codingz @Codingz th.linkedin.com/in/palakorn
- 11. Example DOM Element Document doc = Jsoup.connect("http://www.nextzy.com/").get(); String title = doc.title(); <html> <head> <title>My title</title> </head> <body> <h1>My header</h1> <a href="test.html">My link</a> </body> </html>
- 12. File input = new File("/file/nextzy.html"); Document doc = Jsoup.parse(input, "UTF-8", "http://nextzy.com/"); Element content = doc.getElementById("content"); Elements links = content.getElementsByTag("a"); for (Element link : links) { String linkHref = link.attr("href"); String linkText = link.text(); } Get Element By … fb.com/codingz @Codingz th.linkedin.com/in/palakorn
- 13. Elements links = doc.select("a[href]"); Elements pngs = doc.select("img[src$=.png]"); Element masthead = doc.select("div.masthead").first(); Elements resultLinks = doc.select("h3.active > a"); Like CSS Selector … fb.com/codingz @Codingz th.linkedin.com/in/palakorn
- 14. Document doc = Jsoup.connect("http://jsoup.org").get(); Element link = doc.select("a").first(); String relHref = link.attr("href"); // == "/“ String absHref = link.attr("abs:href"); // "http://jsoup.org/" Work with URL … fb.com/codingz @Codingz th.linkedin.com/in/palakorn