前端页面Ajax控制后端线程（Thread）运行

1、后端生成线程　

JSONObject redisJson = new JSONObject();
Thread th = new Thread(
    () -> {
        ...
        while() {
            ...
        }
        ...
    }
);
th.start();
//以下内容为重点：需借用  redis 存储当前线程名
redisJson .put("thread_name",th.getName())
redisService.setValue(taskKey, StringUtils.toStringTrim(redisJson));  
return  redisJson

2、前端调用Ajax

JSONObject redisJson = JSONObject.parseObject(redisService.getValue("ekg:meta:zcwj:extractparagraphfile:" + taskId));
String th_name = StringUtils.toStringTrim(redisJson.get("thread"));
ThreadGroup currentGroup = Thread.currentThread().getThreadGroup();
int noThreads = currentGroup.activeCount();
Thread[] lstThreads = new Thread[noThreads];
currentGroup.enumerate(lstThreads);
System.err.println("现有线程数" + noThreads);
for (int i = 0; i < noThreads; i++) {
    String nm = lstThreads[i].getName();
    System.err.println("线程号：" + i + " = " + nm);
    if (nm.equals(th_name)) {
        System.err.println("删除线程：" + i + " = " + th_name);
        lstThreads[i].interrupt();
        lstThreads[i].stop();
    }
}
redisService.removeKey("ekg:meta:zcwj:extractparagraphfile:" + taskId);
//循环所有线程，根据线程名称，关闭当前制定的线程