@author [ksf](https://blog.csdn.net/sinat_19528249) 處理的方式有兩種，本次介紹普適性方案，解決問題1。 1.正常業務請求的防止限制 2.極端情況下的請求，rediskey過期帶來的重復請求。 **代碼結構比較清晰，直接貼代碼啦：** ```java @Target(ElementType.METHOD) @Retention(RetentionPolicy.RUNTIME) @Documented @Inherited public @interface LimitSubmit { String key() ; /** * 默認 10s */ int limit() default 10; /** * 請求完成后 是否一直等待 * true則等待 * @return */ boolean needAllWait() default true; } ``` ```java Component @Aspect @Slf4j public class LimitSubmitAspect { //封裝了redis操作各種方法 @Autowired private RedisUtil redisUtil; @Pointcut("@annotation(org.jeecg.common.aspect.annotation.LimitSubmit)") private void pointcut() {} @Around("pointcut()") public Object handleSubmit(ProceedingJoinPoint joinPoint) throws Throwable { LoginUser sysUser = (LoginUser)SecurityUtils.getSubject().getPrincipal(); Method method = ((MethodSignature) joinPoint.getSignature()).getMethod(); //獲取注解信息 LimitSubmit limitSubmit = method.getAnnotation(LimitSubmit.class); int submitTimeLimiter = limitSubmit.limit(); String redisKey = limitSubmit.key(); boolean needAllWait = limitSubmit.needAllWait(); String key = getRedisKey(sysUser,joinPoint, redisKey); Object result = redisUtil.get(key); if (result != null) { throw new JeecgBootException("請勿重復訪問！"); } redisUtil.set( key, sysUser.getId(),submitTimeLimiter); try { Object proceed = joinPoint.proceed(); return proceed; } catch (Throwable e) { log.error("Exception in {}.{}() with cause = \'{}\' and exception = \'{}\'", joinPoint.getSignature().getDeclaringTypeName(), joinPoint.getSignature().getName(), e.getCause() != null? e.getCause() : "NULL", e.getMessage(), e); throw e; }finally { if(!needAllWait) { redisUtil.del(redisKey); } } } /** * 支持多參數，從請求參數進行處理 */ private String getRedisKey(LoginUser sysUser,ProceedingJoinPoint joinPoint ,String key ){ if(key.contains("%s")) { key = String.format(key, sysUser.getId()); } Method method = ((MethodSignature) joinPoint.getSignature()).getMethod(); LocalVariableTableParameterNameDiscoverer discoverer = new LocalVariableTableParameterNameDiscoverer(); String[] parameterNames = discoverer.getParameterNames(method); if (parameterNames != null) { for (int i=0; i < parameterNames.length; i++ ) { String item = parameterNames[i]; if(key.contains("#"+item)){ key = key.replace("#"+item, joinPoint.getArgs()[i].toString()); } } } return key.toString(); } } ``` **使用效果：**  ```java 使用： @LimitSubmit(key = "testLimit:%s:#orderId",limit = 10,needAllWait = true) %S 代表當前登錄人 #參數 代表從參數中獲取，支持多個參數 生成的redis key： testLimit:e9ca23d68d884d4ebb19d07889727dae:order1123123 ``` 1.限制對某個接口的訪問，針對所有人 ，則去除%S 2.限制某個人對某個接口的訪問，則 %S 3.限制某個人對某個接口的業務參數的訪問，則 %S:#參數1:#參數2