创建一个线程池（java）

final CountDownLatch countDownLatch = new CountDownLatch(billUploadHistory.size());//线程统计
                for (BillUpload billUpload : billUploadHistory) {
                    pool.execute(new Runnable() {
                        @Override
                        public void run() {
                            PaybillParser parseService = null;
                            if (EnumTypeOfInt.PAY_CHANNEL_WECHAT.getValue().equals(billUpload.getPayChannel())) {
                                parseService = new WeixinPaybillParser(billUpload, logId);
                            } else if (EnumTypeOfInt.PAY_CHANNEL_ALIPAY.getValue().equals(billUpload.getPayChannel())) {
                                parseService = new AliPaybillParser(billUpload, logId);
                            }
                            if (parseService != null) {
                                try {
                                    parseService.parse();
                                } catch (Exception e) {
                                    e.printStackTrace();
                                } finally {
                                    countDownLatch.countDown();//线程减1
                                }
                            }
                        }
                    });
                }
                try {
                    countDownLatch.await();//阻塞直到计数器为0
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }