널값 오류때문에 질문드립니다 오류부분 추가

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protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String command = request.getPathInfo(); ActionForward actionForward = null; if(command.equals("/ExpertJoin")) { actionForward = expertService.insert(request, response); }else { actionForward = new ActionForward(); actionForward.setCheck(true); actionForward.setPath("../Main.do"); } if(actionForward.isCheck()) { RequestDispatcher view = request.getRequestDispatcher(actionForward.getPath()); view.forward(request, response); }else { response.sendRedirect(actionForward.getPath()); } } ==========================================================================public ActionForward insert(HttpServletRequest request, HttpServletResponse response) { ActionForward actionForward = new ActionForward(); actionForward.setCheck(true); actionForward.setPath("../WEB-INF/view/expert/ExpertJoin.jsp"); String method = request.getMethod(); if(method.equals("POST")) { String saveDirectory = request.getServletContext().getRealPath("upload"); File f = new File(saveDirectory); if (!f.exists()) { f.mkdirs(); } int maxPostSize = 1024*1024*100; Connection con = null; try { MultipartRequest multipartRequest = new MultipartRequest(request, saveDirectory, maxPostSize, "UTF-8", new DefaultFileRenamePolicy()); Enumeration e = multipartRequest.getFileNames(); ArrayList ar = new ArrayList(); while (e.hasMoreElements()) { String s = e.nextElement(); String fname = multipartRequest.getFilesystemName(s); String oname = multipartRequest.getOriginalFileName(s); UploadDTO uploadDTO = new UploadDTO(); uploadDTO.setFname(fname); uploadDTO.setOname(oname); ar.add(uploadDTO); } ExpertDTO expertDTO = new ExpertDTO(); expertDTO.setName(multipartRequest.getParameter("name")); expertDTO.setContract(multipartRequest.getParameter("contract")); expertDTO.setPro(multipartRequest.getParameter("pro")); expertDTO.setSpace_type(multipartRequest.getParameter("space_type")); expertDTO.setA_s(Integer.parseInt(multipartRequest.getParameter("a_s"))); expertDTO.setCareer(Integer.parseInt(multipartRequest.getParameter("career"))); expertDTO.setPay(Integer.parseInt(multipartRequest.getParameter("pay"))); expertDTO.setDeposit(Integer.parseInt(multipartRequest.getParameter("deposit"))); expertDTO.setTag(multipartRequest.getParameter("tag")); expertDTO.setLocation(multipartRequest.getParameter("location")); expertDTO.setPresent(multipartRequest.getParameter("present")); expertDTO.setHomepage(multipartRequest.getParameter("homepage")); expertDTO.setEmail(multipartRequest.getParameter("email")); expertDTO.setPassword(multipartRequest.getParameter("password")); expertDTO.setPhone(multipartRequest.getParameter("phone")); expertDTO.setR_name(multipartRequest.getParameter("r_name")); expertDTO.setR_phone(multipartRequest.getParameter("r_phone")); expertDTO.setAddress(multipartRequest.getParameter("address")); expertDTO.setR_check(multipartRequest.getParameter("r_check")); expertDTO.setRoute(multipartRequest.getParameter("route")); expertDTO.setC_check(Integer.parseInt(multipartRequest.getParameter("c_check"))); con = DBConnector.getConnect(); int num = expertDAO.getNum(); expertDTO.setNum(num); con.setAutoCommit(false); num = expertDAO.insert(expertDTO, con); for(UploadDTO uploadDTO : ar) { uploadDTO.setNum(expertDTO.getNum()); num = uploadDAO.insert(uploadDTO, con); if(num<1) { throw new Exception(); } } con.commit(); } catch (Exception e) { e.printStackTrace(); // TODO: handle exception try { con.rollback(); } catch (Exception e2) { // TODO: handle exception e2.printStackTrace(); } }finally { try { con.setAutoCommit(true); con.close(); } catch (Exception e3) { // TODO: handle exception e3.printStackTrace(); } } actionForward.setCheck(false); actionForward.setPath("../Main.do"); } return actionForward;}===================================================================public int insert(ExpertDTO expertDTO, Connection con) throws Exception{ int result = 0; String sql = "insert into expert values (exqert_seq.nextval, ?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)"; PreparedStatement st = con.prepareStatement(sql); st.setString(1, expertDTO.getName()); st.setString(2, expertDTO.getContract()); st.setString(3, expertDTO.getPro()); st.setString(4, expertDTO.getSpace_type()); st.setInt(5, expertDTO.getA_s()); st.setInt(6, expertDTO.getCareer()); st.setInt(7, expertDTO.getPay()); st.setInt(8, expertDTO.getDeposit()); st.setString(9, expertDTO.getTag()); st.setString(10, expertDTO.getLocation()); st.setString(11, expertDTO.getPresent()); st.setString(12, expertDTO.getHomepage()); st.setString(13, expertDTO.getEmail()); st.setString(14, expertDTO.getPassword()); st.setString(15, expertDTO.getPhone()); st.setString(16, expertDTO.getR_name()); st.setString(17, expertDTO.getR_phone()); st.setString(18, expertDTO.getAddress()); st.setString(19, expertDTO.getR_check()); st.setString(20, expertDTO.getRoute()); st.setInt(21, expertDTO.getC_check()); result = st.executeUpdate(); st.close(); return result; } servlet 컨트롤러에서 service를 호출할때 널값이라고 아예 서비스로 넘어가지 않는데 대체 어디서 오류가 난걸까요...java.lang.NullPointerException com.interior.control.ExpertController.doGet(ExpertController.java:39) javax.servlet.http.HttpServlet.service(HttpServlet.java:634) javax.servlet.http.HttpServlet.service(HttpServlet.java:741) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)실행했을때 이렇게 오류가 나옵니다. 오류가 발생하는 구문은 doGet()에서actionForward = expertService.insert(request, response);이 부분에서 오류가 나고 정확하게 어느 부분에서 오류가 생기는지 확인하기 위해 println으로 테스트 해봤을때 아예 프린트가 나오지 않고 그냥 오류가 나와버립니다.

널값 오류때문에 질문드립니다 오류부분 추가

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