需求：在开发业务报表时，需要从MySQL数据库读取数据后进行操作，然后写入数据库，使用定时任务跑批。

　　分析：①兼顾性能，②  MySQL没有Oracle那么方便、强大的存储过程。综上所述，使用线程池以分批提交的方案把数据插入MySQL数据库，对于更新操作、在Java端进行分页等的操作，本方案也支持。代码如下：

/*** 分页操作数据*/
@Slf4j
@Component
public class BatchDealDemo  {private void batchDeal(List data, int batchNum) throws InterruptedException {int totalNum = data.size();int pageNum = totalNum % batchNum == 0 ? totalNum / batchNum : totalNum / batchNum + 1;ExecutorService executor = Executors.newFixedThreadPool(pageNum);log.info("主线程开始执行 begin --- ");try {CountDownLatch countDownLatch = new CountDownLatch(pageNum);List subData = null;int fromIndex, toIndex;for (int i = 0; i < pageNum; i++) {fromIndex = i * batchNum;toIndex = Math.min(totalNum, fromIndex + batchNum);subData = data.subList(fromIndex, toIndex);ImportTask task = new ImportTask(subData, countDownLatch);executor.execute(task);}// 当前线程必须在执行完任务之后立即调用CountDownLatch.await()方法，// 这样主线程的操作就会被阻塞，直到全部子线程完成各自的任务。//  CountDownLatch类中计数器的值等于0时，主线程就能通过await()方法恢复执行自己的任务。countDownLatch.await();log.info("数据操作完成!可以在此开始主线程的其它业务");log.info("主线程执行完毕 end --- ");} finally {// 关闭线程池，释放资源executor.shutdown();}}class ImportTask implements Runnable {private List list;private CountDownLatch countDownLatch;public ImportTask(List data, CountDownLatch countDownLatch) {this.list = data;this.countDownLatch = countDownLatch;}@Overridepublic void run() {if (null != list) {// 业务逻辑，例如批量insert或者updatelog.info("现在操作的数据是{}", list);}// 发出子线程任务完成的信号countDownLatch.countDown();}}
}