In Jsoup, the Connection interface represents a connection to a URL and provides methods for configuring and executing HTTP requests. It serves as a mechanism for building and customizing HTTP requests before sending them to the server. The Connection interface is primarily used to establish connections to web servers, set request parameters (e.g., headers, cookies, timeouts), and retrieve the response.

The main purpose of the Connection interface in Jsoup is to provide a flexible and convenient way to interact with web servers and retrieve HTML content for parsing, scraping, or other processing tasks. Key features and purposes of the Connection interface include:

Building HTTP Requests : The Connection interface allows developers to construct HTTP requests by specifying the URL to connect to and configuring various request parameters such as method, headers, cookies, and timeouts.

Setting Request Parameters : Developers can use methods provided by the Connection interface to set request parameters such as HTTP headers, cookies, user-agent, referrer, request method, data parameters (for POST requests), and timeouts.

Executing Requests : Once the HTTP request is configured, developers can execute the request using methods like get(), post(), execute(), or request() to send the request to the server and retrieve the response.

Retrieving Response : After executing the request, the Connection interface provides methods to retrieve the HTTP response, including the response status code, response headers, response body (HTML content), and cookies set by the server.

Handling Redirections and Cookies : The Connection interface handles HTTP redirects automatically and provides methods to follow or disable automatic redirection. It also supports handling cookies, allowing developers to send and receive cookies in HTTP requests.

Configuring Timeouts : Jsoup's Connection interface allows developers to set connection and read timeouts to control how long the client should wait for a connection to be established and for data to be read from the server, respectively.