当前位置：首页 > news >正文

SpringBoot-Web开发之拦截器

news 2025/10/24 7:06:53

自定义HandlerInterceptor

HandlerInterceptor

/*** 登录检查* 1、配置好拦截器要拦截哪些请求* 2、把这些配置放在容器中*/
@Slf4j
public class LoginInterceptor implements HandlerInterceptor {/*** 目标方法执行之前* @param request* @param response* @param handler* @return* @throws Exception*/@Overridepublic boolean preHandle(HttpServletRequest request,HttpServletResponse response,Object handler) throws Exception {String requestURI = request.getRequestURI();log.info("preHandle拦截的请求路径是{}",requestURI);//登录检查逻辑HttpSession session = request.getSession();Object loginUser = session.getAttribute("loginUser");if(loginUser != null){//放行return true;}//拦截未登录。跳转到登录页request.setAttribute("msg","请先登录");//重定向或者转发到登录页//re.sendRedirect("/");request.getRequestDispatcher("/").forward(request,response);return false;}/*** 目标方法执行完成以后* @param request* @param response* @param handler* @param modelAndView* @throws Exception*/@Overridepublic void postHandle(HttpServletRequest request,HttpServletResponse response,Object handler,ModelAndView modelAndView) throws Exception {log.info("postHandle执行{}",modelAndView);}/*** 页面渲染以后* @param request* @param response* @param handler* @param ex* @throws Exception*/@Overridepublic void afterCompletion(HttpServletRequest request,HttpServletResponse response,Object handler, Exception ex) throws Exception {log.info("afterCompletion执行异常{}",ex);}
}

config

/*** 1、编写一个拦截器实现HandlerInterceptor接口* 2、拦截器注册到容器中（实现WebMvcConfigurer的addInterceptors）* 3、指定拦截规则【如果是拦截所有，静态资源也会被拦截】*/
@Configuration
public class AdminWebConfig implements WebMvcConfigurer {@Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(new LoginInterceptor())//所有请求都拦截，包括静态资源.addPathPatterns("/**") //放行的请求，排除静态资源和首页.excludePathPatterns("/","/login","/css/**","/fonts/**","/images/**","/js/**");}
}