ExecutorCompletionService

ExecutorCompletionService是能够将多个任务并行同时处理，并将相应结果保存到队列里的并发类

	public void TestExecutorCompletionService() throws Exception {
		Executor defaultExecutor = Executors.newFixedThreadPool(10);
		BlockingQueue queuePool = new BlockingQueuePool(8).getBlockingQueue();
		;
		ExecutorCompletionService ecs = new ExecutorCompletionService(
				defaultExecutor, queuePool);
		List<Future> futures = new ArrayList<Future>();
		futures.add(ecs.submit(new SyncCheckTask("1111")));
		futures.add(ecs.submit(new SyncCheckTask("2222")));
		futures.add(ecs.submit(new SyncCheckTask("3333")));
		futures.add(ecs.submit(new SyncCheckTask("4444")));
		futures.add(ecs.submit(new SyncCheckTask("5555")));
		futures.add(ecs.submit(new SyncCheckTask("6666")));
		int i = 0;
		while (i < 8) {
			Future futrure = ecs.poll(3000, TimeUnit.MILLISECONDS);
			Object result = null == futrure ? null : futrure.get();
			System.out.println(result);
			i++;
		}
	}
	}
class SyncCheckTask implements Callable<String> {
	String ss = null;
	public SyncCheckTask(String ss) {
		this.ss = ss;
	}
	public String call() throws Exception {
		Thread.sleep(Integer.parseInt(ss));
		return ss;
	}