java取模批量插入db的写法

public void batchInsert(int batchNum, List siteIdList) {
        batchNum = 50;
        //插入db的数据
        List siteIds = new ArrayList();
        int i = 0;
        for (Long siteId : siteIdList) {
            if (i % batchNum == 0 && i >= batchNum) {
                //插入db
                //并清除siteIds
                siteIds.clear();
            } else if (i % batchNum != 0 && i == (siteIdList.size() - 1)) {
                //插入db
                //并清除siteIds
                siteIds.clear();
            }
            siteIds.add(siteId);
            i++;
        }
    }

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