添加参数后浏览器找不到servlet url,500找不到questionpage?结果=

在我使用之前 $.get("QuestionPage"... 没有参数,一切都很好。我将其更改为:

$.get("QuestionPage",{result:"nailed"},function(responseJSON){

           //set the question and category texts
           $("#cardArea").val(responseJSON["card"]);
           $( "#cat"  ).text(responseJSON["category"]);
           $( "#cardid" ).text(responseJSON["flashCardnum"]);

           //clear answer field after every 'next'...
           $( "#answerArea" ).val("");

           //set the click function of show button to show the answer..
           $( "#show" ).click(function() {
                $( "#answerArea" ).val(responseJSON["answer"]); 
                answerShown = true;
            });
       });

现在我得到一个500错误,无法加载资源。以下是servlet方法的一部分:

@WebServlet("/QuestionPage")
public class QuestionPageServlet extends HttpServlet {

    private Map<String,UserAccount> activeUsers;
    private List<Card> usersUpdatedCards = new ArrayList<>();  

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {