过滤器

在web.xml中配置

<filter>
  <filter-name>SessionFilter</filter-name>
  <filter-class>com.hrm.controller.SessionFilter</filter-class>
</filter>
<filter-mapping>
  <filter-name>SessionFilter</filter-name>
  <url-pattern>*.do</url-pattern>
  <url-pattern>*.jsp</url-pattern>
</filter-mapping>

在controller 配置SessionFilter类

@Controller
@RequestMapping("/user")
public class UserController {

    @Autowired
    @Qualifier("UserService")
    private IUserService userService;

    @RequestMapping("/login")
    public String login(User user, HttpSession session, Model model){
        System.out.println(user);
        User login_user = userService.findUserByUserNameAndPassWord(user);
        System.out.println(login_user);
        if(login_user != null){
            session.setAttribute("login_user",login_user);
            return "/jsp/main.jsp";
        }else{
            model.addAttribute("message","账号或密码错误,请重新输入");
            return "/index.jsp";
        }
    }

    @RequestMapping("/logout")
    public  String logout(HttpSession session){
        session.removeAttribute("login_user");
        return "redirect:/index.jsp";
    }

    @RequestMapping
    public String findAllUser(Model model){
        List<User> users =userService.findAllUser();
        return "/jsp/user/user.jsp";
    }
 }