Servlet拒绝我的iD工作，它是来自http://puu.sh/cGvGN/6d29084aec.png的int（这些对于学校来说是假的）
我怎样才能让它发挥作用？我以为我做得对，但Servlet停止工作
会发生什么情况是页面没有加载到ViewStudentSchedule页面，因为id INT不起作用。 （它给我一个空白页）
@WebServlet(urlPatterns = {"/StudentLoginServlet"})
public class StudentLoginServlet extends HttpServlet {
/**
* Processes requests for both HTTP <code>GET</code> and <code>POST</code>
* methods.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
try (PrintWriter out = response.getWriter()) {
/* TODO output your page here. You may use following sample code. */
int iD = Integer.valueOf(request.getParameter("iD")).intValue ();
String pw = request.getParameter("pw");
System.out.println(iD);
System.out.println(pw);
Student s1=new Student();
s1.findDB(iD);
String fn=s1.getFirstName();
System.out.println(fn);
String ln=s1.getLastName();
System.out.println(ln);
String pwdb=s1.getPassword();
System.out.println(pwdb);
RequestDispatcher rd;
HttpSession ses1=request.getSession();
ses1.setAttribute("s1", s1);
if (pw.equals(pwdb)){
rd= request.getRequestDispatcher("/ViewStudentSchedule.jsp");
rd.forward(request,response);
}
else{
rd= request.getRequestDispatcher("/LoginError.jsp");
rd.forward(request,response);
}
}
}
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
/**
* Handles the HTTP <code>GET</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Handles the HTTP <code>POST</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Returns a short description of the servlet.
*
* @return a String containing servlet description
*/
@Override
public String getServletInfo() {
return "Short description";
}// </editor-fold>
}
问题如下 int iD = Integer.valueOf（request.getParameter（“iD”））。intValue（）;