Java ExcutorService优雅关闭方式解析

public static void waitUntilTerminate(final ExecutorService executorService, final int timeout) {
    try {
      executorService.shutdown();
      if (!executorService.awaitTermination(timeout, TimeUnit.SECONDS)) { //超时后直接关闭
        executorService.shutdownNow();
      }
    } catch (InterruptedException e) { //awaitTermination 出现中断异常也将触发关闭
      executorService.shutdownNow();
    }
  }

public class ShutDownUtilsTest {

  private ExecutorService executorService;

  @Before
  public void init() {
    executorService = Executors.newFixedThreadPool(1);
  }

  @Test
  public void shutDownOKTest() {
    ShutDownUtils.waitUntilTerminate(executorService, 1);

    CommonUtils.sleep(1); //等待线程处理中断
    Assert.assertTrue(executorService.isTerminated());
  }

  @Test
  public void shutDownNowFailTest() {
    executorService.execute(this::canNotStopThread);
    ShutDownUtils.waitUntilTerminate(executorService, 0);

    CommonUtils.sleep(1); //等待线程处理中断
    Assert.assertFalse(executorService.isTerminated());
  }

  @Test
  public void shutDownNowOKTest() {
    executorService.execute(this::stopThread);
    ShutDownUtils.waitUntilTerminate(executorService, 0);

    CommonUtils.sleep(1); //等待线程处理中断
    Assert.assertTrue(executorService.isTerminated());
  }

  private void canNotStopThread() {
    for (long i = 0; i < Long.MAX_VALUE; i++) {
    }
  }

  private void stopThread() {
    for (long i = 0; i < Long.MAX_VALUE && !Thread.currentThread().isInterrupted(); i++) {
    }
  }
}