import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.StandardCharsets;

public class WebLoader {

    public static String loadPage(String urlString) {
        StringBuilder result = new StringBuilder();

        try {
            URL url = new URL(urlString);
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("GET");
            conn.setRequestProperty("User-Agent", "Mozilla/5.0"); // чтобы сайт не блокировал

            try (BufferedReader reader = new BufferedReader(
                    new InputStreamReader(conn.getInputStream(), StandardCharsets.UTF_8))) {

                String line;
                while ((line = reader.readLine()) != null) {
                    result.append(line).append("\n");
                }
            }

        } catch (Exception e) {
            e.printStackTrace();
        }

        return result.toString();
    }
}