springboot登录拦截

目录结构

实现

• LoginController

@Controller
public class LoginController {

    @RequestMapping("/user/login")
    public String login(@RequestParam("username") String username,
                        @RequestParam("password") String password,
                        HttpSession session,
                        Model model) {
        // 具体的业务
        if (!StringUtils.isEmpty(username) && "123".equals(password)) {
            session.setAttribute("loginUser", username);
            return "redirect:/main.html";
        } else {
            model.addAttribute("msg", "用户名或者密码错误");
            return "index";
        }
    }

}

• LoginHandlerInterceptor

public class LoginHandlerInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 登录成功之后,应该有用户的session
        Object loginUser = request.getSession().getAttribute("loginUser");

        if (loginUser == null) {
            request.setAttribute("msg", "没有权限,请先登录");
            request.getRequestDispatcher("/index.html").forward(request, response);
            return false;
        } else {
            return true;
        }
    }

}

• MyMvcConfig

@Configuration
public class MyMvcConfig implements WebMvcConfigurer {

    @Override
    public void addViewControllers(ViewControllerRegistry registry) {
        registry.addViewController("/").setViewName("index");
        registry.addViewController("/index.html").setViewName("index");
        registry.addViewController("/main.html").setViewName("dashboard");
    }

    // 自定义的国际化组件就生效了!
    @Bean
    public LocaleResolver localeResolver() {
        return new MyLocaleResolver();
    }

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new LoginHandlerInterceptor())
                .addPathPatterns("/**")
                .excludePathPatterns("/index.html", "/", "/user/login", "/css/**", "/js/**", "/img/**");
    }
}