分组操作

public void groupAction(List list, int group, Consumer<List> action) {
    if (CollectionUtils.isEmpty(list)) {
        return;
    }
    for (int i = 0; i < list.size(); i += group) {
        if (i + group > list.size()) {   //作用为最后没有100（你要的分组条数）条数据则剩余几条newList中就装几条
            group = list.size() - i;
        }
        List newList = list.subList(i, i + group);
        if (!CollectionUtils.isEmpty(newList)) {
            action.accept(newList);
        }
    }
}