java 后台代码如何对数据进行封装

1、@RequestMapping(&孥恶膈茯quot;/loginAction.do")public String loginAct足毂忍珩ion(String username,String password,HttpServletRequest request){User user = null;try {user = userService.login(username.trim(), password.trim());} catch (NameorPwdException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (NameorPwdEmptyException e) {// TODO Auto-generated catch blocke.printStackTrace();}

2、HttpSession session = (HttpSession) request.getSession();session.setAttribute("storePhone", user.getUserName());session.setAttribute("user", user);session.setAttribute("code", "");return "redirect:sell.do";}

3、@RequestMapping(&孥恶膈茯quot;/sell.do")public String sell(Model mode造婷用痃l,String phone,HttpServletRequest request){HttpSession session = request.getSession();String storePhone = (String) session.getAttribute("storePhone");if(session.getAttribute("user")==null || "".equals(session.getAttribute("user"))){return "redirect:/login/login.do";}