通过ID获取线程 [英] Get a thread by Id

问题描述

我在JMX Java中工作，并且使用接口ThreadMXBean的getAllThreadIds ()方法获取了所有线程ID，但是我需要一种杀死给定ID的线程的方法.

I worked in JMX java and I get all the thread IDs by using the getAllThreadIds () method of the interface ThreadMXBean but I need a way to kill the thread of a given ID.

例如:

ThreadMXBean tbean;
tbean = ManagementFactory.getThreadMXBean();
long[] IDs=tbean.getAllThreadIds();
//.... I need a way to kill the Threads which have this IDs

推荐答案

您可以尝试以下操作:

public void printAllThreadIds() {
    Thread currentThread = Thread.currentThread();
    ThreadGroup threadGroup = getRootThreadGroup(currentThread);
    int allActiveThreads = threadGroup.activeCount();
    Thread[] allThreads = new Thread[allActiveThreads];
    threadGroup.enumerate(allThreads);

    for (int i = 0; i < allThreads.length; i++) {
        Thread thread = allThreads[i];
        long id = thread.getId();
        System.out.println(id);
    }
}

private static ThreadGroup getRootThreadGroup(Thread thread) {
    ThreadGroup rootGroup = thread.getThreadGroup();
    while (true) {
        ThreadGroup parentGroup = rootGroup.getParent();
        if (parentGroup == null) {
            break;
        }
        rootGroup = parentGroup;
    }
    return rootGroup;
}

但是您应该打扰Thread而不是stop.

But you should interrupt a Thread and not stop it.

不推荐使用Thread.stop()方法，因为它会立即杀死Thread.因此，当前由Thread更改的数据结构可能保持不一致状态.中断使线程有机会正常关闭.

The Thread.stop() method is deprecated, because it immediately kills a Thread. Thus data structures that are currently changed by this Thread might remain in a inconsistent state. The interrupt gives the Thread the chance to shutdown gracefully.

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