Example

public class Connect {

public static void main(String[] args) {

    String pageURL = "https://parents.mtsd.k12.nj.us/genesis/parents?tab1=studentdata&action=form";
    String param1 = "&tab2=gradebook";
    String param2 = "&tab3=weeklysummary";
    String param3 = "&studentid=";
    Scanner input = new Scanner (System.in);
    String initURL = "https://parents.mtsd.k12.nj.us/genesis/parents?gohome=true";
    String sID = "not shown";

    String URLF = pageURL + param1 + param2 + param3 + sID;

    connectTo(URLF);
}

public static Document connectTo (String URLF){

    String loginURL = "https://parents.mtsd.k12.nj.us/genesis/parents/j_security_check";
    String userDataUrl = URLF;
    String username = "not shown";
    String password = "not shown";

    Connection.Response res = null;
    Document doc = null;

    try {

        res = Jsoup.connect(userDataUrl)
                .userAgent("Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.4 Safari/537.36")
                .header("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8")
                .timeout(500)
                .method(Connection.Method.GET)
                .execute();

    } catch (IOException io) {io.printStackTrace();}

    try {

        doc = Jsoup.connect(loginURL)
                .userAgent("Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.4 Safari/537.36")
                .referrer("https://parents.mtsd.k12.nj.us/genesis/parents?gohome=true")
                .cookies(res.cookies())
                .data("j_username", username)
                .data("j_password", password)
                .post();


    } catch (IOException ioe) {ioe.printStackTrace();}

    if (doc != null){
        System.out.print(doc.text());
    }
    return null;
}
}