以下是我写的代码，但是executorServices.execute()方法不执行，这是为啥呀

List<String> pricePos = preferProductPriceMapper.selectInfobyCustNumber(queryMap);
try {

        for (int i = 0; i < pricePos.size(); i++) {
            final String number = pricePos.get(i);
            executorServices.execute(() -> {
                System.out.println(Thread.currentThread().getName() + "-结果:" + number);
                PreferProductPricePo preferProductPricePo = new PreferProductPricePo();
                preferProductPricePo.setCustNumber(number);
                List<PrefetProductPriceSenderInfoPo> prefetProductPriceSenderInfos = preferProductPriceMapper.selectInfobyCustNumberList(preferProductPricePo);
                for (PrefetProductPriceSenderInfoPo productPriceSenderInfoPo : prefetProductPriceSenderInfos) {
                    System.out.println(Thread.currentThread().getName() + "-结果:" + number);
                    String custNumber = productPriceSenderInfoPo.getCustNumber();
                    String id = productPriceSenderInfoPo.getId().toString();
                    cmcDiscountProducer.send(custNumber + id, JSONObject.toJSONString(productPriceSenderInfoPo));
                }
            });
        }
    } finally {
        executorServices.shutdown();
    }