Java后端防止重复提交

pom文件加入aop依赖

    org.aspectj
    aspectjweaver

自定义注解
 

@Target(ElementType.METHOD) // 作用到方法上
@Retention(RetentionPolicy.RUNTIME) // 运行时有效
public @interface NoRepeatSubmit {
    //名称，如果不给就是要默认的
    String name() default "name";
}

使用aop
 

@Aspect
@Component
@Slf4j
public class NoRepeatSubmitAop {
    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 切入点
     */
    @Pointcut("@annotation(cn.yunwan.common.NoRepeatSubmit)")
    public void cut() {
    }

    @Around("cut()")
    public Object arround(ProceedingJoinPoint joinPoint) throws Throwable {

        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        assert attributes != null;
        HttpServletRequest request = attributes.getRequest();
        String token = request.getHeader("Token");
        //这里是唯一标识 根据情况而定(我这里根据token)
        String key = token + "-" + request.getServletPath();
        // 如果缓存中有这个url视为重复提交
        if (!redisTemplate.hasKey(key)) {
            //通过，执行下一步
            Object o = joinPoint.proceed();
            //然后存入redis 并且设置5s倒计时
            redisTemplate.opsForValue().set(key, "0",5, TimeUnit.SECONDS);
            return o;
        } else {
            return CommonResult.failed( "请勿重复提交或者操作过于频繁！");
        }

    }

}

注解作用到方法接口上

    @NoRepeatSubmit(name = "test") // 
    @GetMapping("test")
    public Result test() {
        return Result.success("测试！");
    }