How Can I Download and Parse Web Pages in Java Using Jsoup?

Downloading and Parsing Webpages in Java

Introduction

Web scraping is a technique used to extract data from websites. Java provides robust tools for fetching and processing web pages. This article explores how to download a webpage programmatically and save it as a string in Java.

Using Jsoup for HTML Parsing

For HTML parsing, Jsoup is a highly recommended library. It handles complex tasks seamlessly, including:

• Fetching the web page's HTML using Jsoup.connect("url").get().
• Parsing the HTML into a Document object for easy manipulation.

Example:

Document document = Jsoup.connect("http://google.com").get();

Handling Compression

Jsoup automatically handles common compression methods such as GZIP and chunked responses. This ensures that you receive the uncompressed HTML content.

Extracting the HTML as a String

To obtain the HTML as a string, simply call the html() method on the Document object:

String html = document.html();

Advantages of Using Jsoup

In addition to compression handling, Jsoup offers several advantages:

• CSS selector support for HTML traversal and manipulation.
• Robust character encoding handling.
• Extensible API for custom functionality.

Conclusion

By utilizing Jsoup's capabilities, you can effectively download and parse web pages in Java. This enables you to perform advanced data extraction and processing tasks. For further insights, refer to the "See also" section.

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