Process p = rt.exec("notepad.exe");

        ProcessHandle ph = p.toHandle();

        System.out.println("进程是否运行：" + ph.isAlive());

        System.out.println("进程ID：" + ph.pid());

        System.out.println("父进程：" + ph.parent());

        ProcessHandle.Info info = ph.info();

        System.out.println("进程命令：" + info.command());

        System.out.println("进程参数：" + info.arguments());

        System.out.println("进程启动时间： " + info.startInstant());

        System.out.println("进程积计运行时间：" + info.totalCpuDuration());

        // 通过CompletetableFuture 在进程结束时运行某个命令

        CompletableFuture<ProcessHandle>  cf = ph.onExit();

        cf.thenRunAsync(() -> System.out.println("程序退出"));

        Thread.sleep();

进程是否运行：true

进程ID：7004

父进程：Optional[13192]

进程命令：Optional[C:\Windows\System32\notepad.exe]

进程参数：Optional.empty

进程启动时间： Optional[2019-07-25T07:07:49.393Z]

进程积计运行时间：Optional[PT0.03125S]

程序退出