不适用于同时超时控制多个线程

时间：2025-04-01 13:18:11

()属于线性超时控制，如果创建多个线程想用它控制所有新线程的执行时间是不可行的。通俗一点说就是该方法中使用的只有一个，即使是在循环中使用了，也只能等其控制完第一个线程之后才能控制后续线程。下面看例子：例子中展示了新创建的9个线程，使用该方法进行超时控制

public static void main(String[] args) throws Exception {

        List<Thread> list = new ArrayList<>();

        for (int i = 0; i < 10; i++) {
            Thread thread = new Thread(new Runnable() {
                @Override
                public void run() {
                    try {
                        System.out.println(Thread.currentThread());
                        Thread.sleep(6000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                        return;
                    }
                    System.out.println("任务继续执行..........");
                }
            });

            System.out.println(Thread.currentThread());
            thread.start();

//          throw new TimeoutException("Thread did not finish within timeout");


            list.add(thread);

        }

        for (Thread o : list) {

            TimeUnit.SECONDS.timedJoin(o, 3);


            if (o.isAlive()) {
                o.interrupt();
                throw new TimeoutException("Thread did not finish within timeout");
            }

        }
    }

执行结果如下：

Thread[main,5,main]
Thread[main,5,main]
Thread[main,5,main]
Thread[main,5,main]
Thread[main,5,main]
Thread[main,5,main]
Thread[main,5,main]
Thread[main,5,main]
Thread[main,5,main]
Thread[main,5,main]
Thread[Thread-0,5,main]
Thread[Thread-1,5,main]
Thread[Thread-2,5,main]
Thread[Thread-3,5,main]
Thread[Thread-4,5,main]
Thread[Thread-5,5,main]
Thread[Thread-6,5,main]
Thread[Thread-7,5,main]
Thread[Thread-8,5,main]
Thread[Thread-9,5,main]
Exception in thread "main" java.lang.InterruptedException: sleep interrupted
	at java.lang.Thread.sleep(Native Method)
	at com.sinosoft.newstandard.coreservice.controller.test2$1.run(test2.java:26)
	at java.lang.Thread.run(Thread.java:748)
java.util.concurrent.TimeoutException: Thread did not finish within timeout
	at com.sinosoft.newstandard.coreservice.controller.test2.main(test2.java:52)
任务继续执行..........
任务继续执行..........
任务继续执行..........
任务继续执行..........
任务继续执行..........
任务继续执行..........
任务继续执行..........
任务继续执行..........
任务继续执行..........

Process finished with exit code 1

可见，只有第一个线程被超时控制了，剩下的8个线程都顺利执行完毕！

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