Master Web Scraping with Java: Getting Started with Jsoup

A friend needed to automate the collection of competition data from web pages, so the author suggests using Jsoup, an open‑source Java library for parsing HTML.

Jsoup offers a convenient API that uses HTML5 DOM methods and CSS selectors to fetch and extract data from URLs, files, or strings.

Key features include:

Extracting and parsing HTML from URLs, files, or strings

Finding and extracting data using DOM traversal or CSS selectors

Modifying HTML elements, attributes, and text

Cleaning user‑submitted content against a safe list to prevent XSS attacks

Outputting tidy HTML

Jsoup can handle messy, unstructured web pages by building a reasonable parse tree.

Below is a demonstration that connects to Wikipedia, retrieves the page title, selects headline links, and logs each headline’s title and absolute URL.

Document doc = Jsoup.connect("https://en.wikipedia.org/").get();
log(doc.title());
Elements newsHeadlines = doc.select("#mp-itn b a");
for (Element headline : newsHeadlines) {
    log("%s
\t%s", headline.attr("title"), headline.absUrl("href"));
}

This simple example shows basic usage; more complex scenarios and data export challenges may arise in real‑world crawling tasks.