1、後端生成執行緒　

JSONObject redisJson = new JSONObject();
Thread th = new Thread(
    () -> {
        ...
        while() {
            ...
        }
        ...
    }
);
th.start();
//以下內容為重點：需借用  redis 儲存當前執行緒名
redisJson .put("thread_name",th.getName())
redisService.setValue(taskKey, StringUtils.toStringTrim(redisJson)); 
 
 
return  redisJson

2、前端呼叫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("現有執行緒數" + noThreads);
for (int i = 0; i < noThreads; i++) {
    String nm = lstThreads[i].getName();
    System.err.println("執行緒號：" + i + " = " + nm);
    if (nm.equals(th_name)) {
        System.err.println("刪除執行緒：" + i + " = " + th_name);
        lstThreads[i].interrupt();
        lstThreads[i].stop();
    }
}
redisService.removeKey("ekg:meta:zcwj:extractparagraphfile:" + taskId);
//迴圈所有執行緒，根據執行緒名稱，關閉當前制定的執行緒