Best way for Cyclomatic complexity reduction

Below Method has cyclomatic complexity of 13 i follow some approach using ternary operator for small if else, but for long code what is best approach what design pattern use for resuce if else condition or any other way to reduce cyclomatic complexity as sonarQube Shows Cyclomatic Complexity error. I am newbie help me for undersatnding the process

  @RequestMapping(value = "/submitUser", method=RequestMethod.POST)
            public String submitUser(@ModelAttribute User userBean,Locale locale, RedirectAttributes redirectAttributes, HttpSession session, Model model) {
        boolean status = false, isAdd = false;
        String imagePath = "", task = "";
        isAdd = userBean.getAdd();
        /*if(isAdd) {
                    task = "add";
                } else {          // replace this by task=isAdd?"add":"edit";
                    task = "edit"; //
                }*/
                GlobalLogger.logApplicationDebugLog("Received request to " + task + " user ", LOGGER);
        if (session != null && session.getAttribute("UserImagePath") != null) {
            imagePath = session.getAttribute("UserImagePath").toString();
                }
                int currentUserId = Integer.parseInt(session.getAttribute(SessionKeyConstants.USER_ID).toString());
                try {
                    status = iuser.submitUser(userBean, imagePath,currentUserId);
                    if(isAdd) {
                        if (status) {
                            GlobalLogger.logInfoLog("User "+userBean.getUserName()+" has been " + task + "ed successfully", LOGGER);
                            redirectAttributes.addFlashAttribute("successMsg", messageSource.getMessage("operationMsg.addUserSuccess", new String[] {userBean.getEmpEmail()}, locale));
                            return "redirect:/users.action";
                        } else {
                            GlobalLogger.logApplicationDebugLog("Error in adding user "+userBean.getUserName(), LOGGER);
                            redirectAttributes.addFlashAttribute("errorMsg", messageSource.getMessage("operationMsg.addUserFailure", new String[] {}, locale));
                            redirectAttributes.addFlashAttribute("isAdd", isAdd);
                            redirectAttributes.addFlashAttribute("userBean", userBean);
                            return "redirect:/addUser.action?isAdd=true";
                        }
                    } else {
                        if (status) {
                            GlobalLogger.logInfoLog("User "+userBean.getUserName()+" has been " + task + "ed successfully", LOGGER);
                            redirectAttributes.addFlashAttribute("successMsg", messageSource.getMessage("label.addSuccessMsg", new String[] {userBean.getFirstName()}, locale));
                            return "redirect:/users.action";
                        } else {
                            GlobalLogger.logApplicationDebugLog("Error in adding user "+userBean.getUserName(), LOGGER);
                            redirectAttributes.addFlashAttribute("errorMsg", messageSource.getMessage("label.addFailedMsg", new String[] {userBean.getFirstName()}, locale));
                            redirectAttributes.addFlashAttribute("isAdd", isAdd);
                            redirectAttributes.addFlashAttribute("userBean", userBean);
                            return "redirect:/addUser.action?isAdd=false";
                        }
                    }
                } catch (UserException e) {
                    GlobalLogger.logApplicationDebugLog("User Name or Employee Id exists for user "+userBean.getUserName(), LOGGER);
                    redirectAttributes.addFlashAttribute("userBean", userBean);
                    redirectAttributes.addFlashAttribute("errorMsg", messageSource.getMessage(e.getErrorcode(), new String[] {}, locale));
                    return "redirect:/addUser.action?isAdd=true";
                }
            }