@Controller @RequestMapping("index") public class IndexController { /** * 去后台首页 * @param request * @return */ @RequestMapping("") public String toIndex(HttpServletRequest request){ return "index"; } }
/** *登录拦截器 */ public class LoginInterceptor implements HandlerInterceptor{ @Override public boolean preHandler(HttpServletRequest request,HttpServletResponse response,Object handler) throws Exception{ Logger log = LoggerFactory.getLogger(LoginInterceptor.class); //1. 获取请求地址 String uri = request.getRequestUri("adminlogin"); // 2. 该地址若存在 则放行 if(uri.indexOf("adminlogin") >= 0 || uri.indexOf("login") >= 0){ retrun true; } // 3. 获取会话对象session HttpSession session = request.getSession(); // 4.通过会话对象session获取标记ADMIN User user = (User)session.setAttribute("ADMIN"); // 5. 通过ADMIN获取到的User对象、进行判断是否存在 if(user != null){ //表示已登录、不再拦截 log.info("表示已登录、不再拦截"); return true; } // 6. 已拦截 request.setAttribute("msg","尚未进行登录"); log.info("表示未登录、已拦截"); response.sendRedirect(request.getConetxtPath + "/adminlogin"); return false; } }
配置:
@Configuration public class LoginConfig implements WebMvcConfigurer { @Override public void addInterceptors(InterceptorRegistry registry) { InterceptorRegistration registration = registry.addInterceptor(new LoginInterceptor()); // 拦截路径: 项目下所有拦截 registration.addPathPatterns("/**"); // 不拦截路径: registration.excludePathPatterns("/login,/**/*.html","/**/*.css","/**/*.png","/**/*.js","/**/*.jpg"); } @Override public void addViewControllers(ViewControllerRegistry registry) { registry.addViewController("/").setViewName("index"); registry.addViewController("index.html").setViewName("index"); } }
<!DOCTYPE html> <html lang="en" xmlns:th="http://www.thymeleaf.org"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>LOGIN</title> <link rel="stylesheet" th:href="@{/static/component/style/components.css}" href="../static/component/style/components.css"> <link rel="stylesheet" th:href="@{/static/css/bootstrap.css}" href="../static/css/bootstrap.css"> <link rel="stylesheet" th:href="@{/static/css/plugins.css}" href="../static/css/plugins.css"> <link rel="stylesheet" th:href="@{/static/css/main.css}" href="../static/css/main.css"> <link rel="stylesheet" th:href="@{/static/css/themes.css}" href="../static/css/themes.css"> <script th:src="@{/static/component/js/JQuery2.1.4.js}"></script> <script th:src="@{/static/component/plugins/layer/layer.js}"></script> </head> <body> <div id="login"> <form action="/login" method="post"> <div class="center"> <dl> <dt><i class="gi gi-leaf"></i>Lover's · <span> BookHouse</span></dt> <dd><span><i class="fa fa-fw fa-user"></i></span><input type="text" name="usercode" placeholder="请输入账号"></dd> <dd><span><i class="fa fa-fw fa-lock"></i></span><input type="password" name="password" placeholder="请输入密码"></dd> <dd><button type="submit">登录</button></dd> </dl> </div> </form> </div> </body> </html>
