springboot解决前端短时间重复提交问题

/**
 * 自定义一个注解，给需要防止重复提交的方法加上该注解
 */
public @interface RepeatSubmit {
}

使用spring的aop，对注解进行切面，通过guava的缓存来记录提交和设置过期时间

@Aspect
@Configuration
public class SubmitAspect {
    private final Cache CACHES = CacheBuilder.newBuilder()
            // 最大缓存 100 个
            .maximumSize(100)
            // 设置缓存过期时间为S
            .expireAfterWrite(3, TimeUnit.SECONDS)
            .build();

    @Pointcut("@annotation(com.bccah.modweb.home.annotation.RepeatSubmit)")
    public void pointCut() {
    }

    @Around("pointCut()")
    public Object interceptor(ProceedingJoinPoint pjp) {
        WebAccountInfoDO user = UserShiroUtils.getUser();
        if (user == null) {
            return ResultTool.fail(ResultTool.HttpResponseCode.NOT_LOGIN);
        }
        MethodSignature signature = (MethodSignature) pjp.getSignature();
        Method method = signature.getMethod();
        RepeatSubmit form = method.getAnnotation(RepeatSubmit.class);
        String key = getCacheKey(user.getId(), method, pjp.getArgs());
        if (!StringUtils.isEmpty(key)) {
            if (CACHES.getIfPresent(key) == null) {
                // 如果是第一次请求,就将key存入缓存中
                CACHES.put(key, key);
            } else {
                ResultEntity resultResponse = new ResultEntity();
                resultResponse.setData(null);
                resultResponse.setMsg("请勿重复请求");
                resultResponse.setCode(405);
                return resultResponse;
            }
        }
        try {
            return pjp.proceed();
        } catch (Throwable throwable) {
            throw new RuntimeException("服务器异常");
        }
    }

    /**
     * 加上用户的唯一标识
     */
    private String getCacheKey(String uid, Method method, Object[] args) {
        return uid + "/" + method.getName();
    }
}

需要添加的注解有

    com.google.guava
    guava
    27.1-jre



    org.springframework.boot
    spring-boot-starter-aop

转载地址：https://juejin.im/post/5cf78addf265da1b5f264441