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因為要定時往數據庫插入上百萬數據,插入完之后再修改另外一部分數據, 怎么在線程池執行完所有任務后再執行主線程呢

import java.util.Random; import java.util.concurrent.CountDownLatch; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors;public class Test {public static ExecutorService executorService = Executors.newCachedThreadPool(); private static CountDownLatch cdl = new CountDownLatch(10);private static final Random random = new Random();public void test() {for (int i = 0; i < 10; i++) executorService.execute(new ThreadTest());}public static void main(String[] args) {new Test().test();//插入數據完成后 執行修改操作try { cdl.await();} catch (InterruptedException e) {}System.out.println("它們已經插完啦..............................");executorService.shutdown();}class ThreadTest implements Runnable {public void run() {//執行插入數據操作 每次插入一條// 模擬耗時int time = random.nextInt(10000);try {Thread.sleep(time);} catch (InterruptedException e) {}System.out.println(Thread.currentThread().getName() + "執行完了，耗時：" + time / 1000 + "秒");cdl.countDown();}} }

轉載于:https://my.oschina.net/u/2462659/blog/1541693

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