1：pom添加依赖

  <dependency><groupId>net.jodah</groupId><artifactId>expiringmap</artifactId><version>0.5.10</version></dependency>

2：封装工具

@Slf4j
public class RequestUtil {/*** 1）ExpirationPolicy.ACCESSED ：每进行一次访问，过期时间就会自动清零，重新计算；* 2）ExpirationPolicy.CREATED：在过期时间内重新 put 值的话，过期时间会清理，重新计算；*/private final static ExpiringMap<String, String> EXP_TIME_MAP = ExpiringMap.builder()// 设置每个key有效时间5s, 如果key不设置过期时间，key永久有效.expiration(5, TimeUnit.SECONDS)// 允许更新过期时间值.variableExpiration()// CREATED: 只在put和replace方法重置过期时间.expirationPolicy(ExpirationPolicy.CREATED).build();/*** @param* @Description 判断在固定时间内是否重复请求* @Throws* @Return boolean* @Date 2024-03-04 17:26:38* @Author WangKun*/public static boolean isRepeatSubmitInterceptor(HttpServletRequest request, HttpServletResponse response) {//获取用户访问地址String uri = request.getRequestURI();String ip = IPUtil.getIpAddr(request);if (uri.equals(EXP_TIME_MAP.get(ip))) {return true;}EXP_TIME_MAP.put(ip, uri);return false;}}

3：调用（springboot拦截）

/*** @Description 拦截器* @Author WangKun* @Date 2023/3/6 10:16* @Version*/
@Slf4j
public class UrlInterceptor implements HandlerInterceptor {/*** @param request* @param response* @param handler* @Description 调用时间：Controller方法处理之前* 执行顺序：链式Intercepter情况下，Intercepter按照声明的顺序一个接一个执行* 若返回false，则中断执行，注意：不会进入afterCompletion* @Throws* @Return boolean* @Date 2023-04-21 10:19:32* @Author WangKun*/@Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws IOException {//在这里调用return true;}/*** @param request* @param response* @param handler* @param ex* @Description 调用前提：preHandle返回true* 调用时间：DispatcherServlet进行视图的渲染之后* 多用于清理资源* @Throws* @Return void* @Date 2023-04-21 10:19:53* @Author WangKun*/@Overridepublic void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {}}

拦截器配置

/*** @Description 拦截器配置* @Author WangKun* @Date 2023/3/6 10:33* @Version*/
@Configuration
public class WebInterceptorConfig implements WebMvcConfigurer {/*** @param registry* @Description 跨域* @Throws* @Return void* @Date 2023-04-21 10:34:12* @Author WangKun*/@Overridepublic void addCorsMappings(CorsRegistry registry) {//设置允许跨域的路径registry.addMapping("/**")//设置允许跨域请求的域名 2.0版本使用allowedOrigins 2.4版本以上使用allowedOriginPatterns.allowedOriginPatterns("*")//是否允许证书 不再默认开启.allowCredentials(true)//设置允许的方法.allowedMethods("GET", "HEAD", "POST", "PUT", "DELETE")// 所有请求头.allowedHeaders("*")//跨域允许时间.maxAge(3600);}/*** @param registry* @Description 拦截放行配置* @Throws* @Return void* @Date 2023-04-21 10:33:51* @Author WangKun*/@Overridepublic void addInterceptors(InterceptorRegistry registry) {//添加拦截器registry.addInterceptor(new UrlInterceptor())//拦截所有路径.addPathPatterns("/**");//放行路径，可以添加多个
//                .excludePathPatterns("/api/login");}
}