public class Test {
    public static void main(String[] args) throws InterruptedException {
        TwoPhaseTermination twoPhaseTermination = new TwoPhaseTermination();
        twoPhaseTermination.start();

        Thread.sleep(3000);
        twoPhaseTermination.stop();

    }
}

class TwoPhaseTermination{
    // 監(jiān)控線程
    private Thread monitorThread;

    public void start(){
        monitorThread = new Thread(()->{
            Thread current = Thread.currentThread();
            while(true){
                if(current.isInterrupted()){

                    System.out.println("線程要關閉了...");
                    break;
                }
                try {
                    Thread.sleep(1000); // 階段1
                    System.out.println("監(jiān)控線程正在工作...."); // 階段2
                     // 如果在階段2被打斷，線程的isInterrupted標志位為true,會捕抓到信號并關閉線程
                     // 如果在階段1被打斷，會進入catch語句塊，并且isInterrupted標志位清空，無法關閉線程
                } catch (InterruptedException e) {
                    e.printStackTrace();
                    // 需要重新設置isInterrupted標志位為true
                    monitorThread.interrupt();
                }
            }

        });
        // 啟動線程
        monitorThread.start();
    }

    public void stop(){
        // 設置isInterrupted標志位true
        monitorThread.interrupt();
    }
}