public class test
{
public static void main(String[] args) throws IOException{
    final String USER_AGENT = ""Mozilla/5.0 (Windows NT" +n" +
     "          " 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36"";
    String loginFormUrl = "https://jira.aciworldwide.com/login.jsp";
    String loginActionUrl = "https://jira.aciworldwide.com/login.jsp";
    String username = "jon@jon";
    String password = "XXXXXX";

     HashMap<String, String> cookies = new HashMap<>();
     HashMap<String, String> formData = new HashMap<>();

     Connection.Response loginForm = Jsoup.connect(loginFormUrl).method(Connection.Method.GET).userAgent(USER_AGENT).execute();
     Document loginDoc = loginForm.parse(); // this is the document that contains response html

     cookies.putAll(loginForm.cookies()); // save the cookies, this will be passed on to next request

     formData.put("login", "Log In");
     formData.put("os_username", username);
     formData.put("os_password", password);

     Connection.Response homePage = Jsoup.connect(loginActionUrl)
         .cookies(cookies)
         .data(formData)
         .method(Connection.Method.POST)
         .userAgent(USER_AGENT)
         .execute();

     System.out.println(homePage.parse().html());


   }
}