多线程批量拆分处理List集合任务

List studentList = new linkedList<>();
        studentList.add("A");
        studentList.add("B");
        studentList.add("C");
        studentList.add("D");
        studentList.add("E");

        studentList.add("F");
        studentList.add("G");
        studentList.add("H");
        studentList.add("I");
        studentList.add("J");

        studentList.add("K");
        studentList.add("L");
        studentList.add("M");
        studentList.add("N");
        studentList.add("O");

        int nThreads = 3;

        int size = studentList.size();
        ExecutorService executorService = Executors.newFixedThreadPool(nThreads);
        List> futures = new ArrayList>(nThreads);

        for (int i = 0; i < nThreads; i++) {
            final List groupList = studentList.subList(size / nThreads * i, size / nThreads * (i + 1));


            Callable task1 = () -> {
                log.info("Print:"+JSONObject.toJSonString(groupList));
                //do your work
                return 1;
            };
          
            futures.add(executorService.submit(task1));
        }
        executorService.shutdown();
        if (!futures.isEmpty() && futures != null) {
            log.info("I AM COPY OVER");
        }

参考：【java】多线程批量拆分List导入数据库_哈士奇-CSDN博客_多线程批量导入数据库