spring 事务不生效

1.方法自身（this）调用问题，导致事务失效

非事务方法seckillVoucher()中调用的自身类的事务方法createVoucherOrder()。

解决办法：

ps:要加aspj依赖，同时在Application中开启@EnableAspectJAutoProxy(exposeProxy = true)

@Override
public Result seckillVoucher(Long voucherId) {
    //1.判断优惠券ID是否存在
    SeckillVoucher seckillVoucher = iSeckillVoucherService.getById(voucherId);
    //2.不存在，返回异常
    if(seckillVoucher == null){
        return Result.fail("优惠券不存在");
    }
    //3.存在，判断秒杀是否开始
    if(seckillVoucher.getBeginTime().isAfter(LocalDateTime.now())){
        return Result.fail("秒杀未开始");
    }
    //4.存在，判断秒杀是否结束
    if(seckillVoucher.getEndTime().isBefore(LocalDateTime.now())){
        return Result.fail("秒杀已结束");
    }
    //5.库存为空，返回异常
    if(seckillVoucher.getStock() < 1){
        return Result.fail("库存不足");
    }
    Long userId = UserHolder.getUser().getId();
    /*----------这里调用-------------*/
    synchronized (userId.toString().intern()){
        return createVoucherOrder(voucherId);
    }
    /*----------用这种-------------*/
    synchronized (userId.toString().intern()){
        return ((IVoucherOrderService)AopContext.currentProxy()).createVouch
    }
}
@Transactional
public Result createVoucherOrder(Long voucherId){
    //判断用户是否已经有优惠券
    QueryWrapper<VoucherOrder> queryWrapper = new QueryWrapper<>();
    queryWrapper.eq("user_id",UserHolder.getUser().getId());
    queryWrapper.eq("voucher_id",voucherId);
    int record = this.count();
    if(record > 0){
        return Result.fail("this user have voucher");
    }
    //6.库存不为空，新增数据，减库存
    boolean success = iSeckillVoucherService.update()
            .setSql("stock = stock - 1")
            .eq("voucher_id", voucherId)
            .gt("stock",0)
            .update();
    if(!success){
        return Result.fail("库存不足");
    }
    long orderId = redisWorker.nextId("order");
    VoucherOrder voucherOrder = new VoucherOrder();
    voucherOrder.setId(orderId);
    voucherOrder.setUserId(UserHolder.getUser().getId());
    voucherOrder.setVoucherId(voucherId);
    save(voucherOrder);
    //返回订单ID
    return Result.ok(orderId);
}