SpringBoot拦截器
- 编写一个拦截器实现类实现HandlerInterceptor接口
@Slf4j
public class LoginInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
log.info("preHandle()拦截的请求路径为:"+request.getRequestURI());
HttpSession session = request.getSession();
Object loginUser = session.getAttribute("loginUser");
if (loginUser != null) {
System.out.println("登录检查1s后必放行");
return true;
}
System.out.println("登录检查拦截器正在拦截ing...并自动跳转到登录页面");
request.setAttribute("msg","拦截器告诉你,请先登录");
request.getRequestDispatcher("/").forward(request, response);
return false;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
log.info("postHandle执行的modelAndView对象"+modelAndView);
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
log.info("afterCompletion执行结束旗下是否有异常"+ex);
}
}
- 拦截器注册到容器中。实现WebMvcConfigurer接口中的addInterceptors()方法的addInterceptor()方法。
- 链式调用指定拦截规则
@Configuration
public class AdminWebConfig implements WebMvcConfigurer {
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(new LoginInterceptor())
.addPathPatterns("/**")
.excludePathPatterns("/","/login","/css/**","/fonts/**","/images/**","/js/**");
}
}