优雅的批量插入

Java

分批插入简洁代码

public int saveLatestKeyword(List<BaiduCpcKeywords> keywordInfoList, Long userId) {
        int count = 0;
        int size = keywordInfoList.size();
        if (size > 0) {
            // 分批插入
            int maxNum = 1000;
            List<BaiduCpcKeywords> tempList = null;
            int i = 0;
            do {
                int toIndex = i + maxNum < size ? i + maxNum : size;
                if (i >= toIndex) break;
                tempList = keywordInfoList.subList(i, toIndex);
                count += baiduCpcKeywordsDAO.saveBaiduCpcKeywordsBatch(tempList);
                i += maxNum;
            } while (tempList.size() == maxNum);
            if (count != keywordInfoList.size()) {
                logger.warn("【SEM-批量插入百度推广数据】批量插入推广关键词数据出错");
            }
        }
        return count;
    }

拆分集合工具

guava工具类

List<User> users = userService.findAll();
//按每50个一组分割
List<List<User>> parts = Lists.partition(users, 50);
parts.stream().forEach(list -> {
            process(list);
});

批量插入可优化的点

参考：https://www.cnblogs.com/kxdblog/p/4056010.html