批量数据的Excel导入

public void importIndexHistoryByCsv(String fileName) {
    logger.info("开始获取Csv文件导入到数据库，csv文件名为:" + fileName);
    File file = new File(fileName);
    cnAbsHistoryDataService.importIndexHistoryByCsv(file);

}

//指数历史数据导入
@Override
public void importIndexHistoryByCsv(File file) {
    List<String> csvList = transCsvToList(file);
    List<AbsSecurityEntity> absSecurityList = new ArrayList<AbsSecurityEntity>();
    List<AbsSecuritySummaryEntity> summaryList = new ArrayList<AbsSecuritySummaryEntity>();

    int j = 0;
    int i = 0;
    try {
        List<AbsSecurityEntity> totalSecurityList = new ArrayList<>();
        for (j = 0; j < csvList.size(); j++) {
            String[] lineDate = csvList.get(j).split(",");
            AbsSecurityEntity security = new AbsSecurityEntity();
            AbsSecuritySummaryEntity summary = new AbsSecuritySummaryEntity();
            i = -1;
            security.setSecurityId(Long.valueOf(lineDate[++i]));
            summary.setNoteId(Long.valueOf(lineDate[i]));
            security.setSecurityCode(lineDate[++i]);
            summary.setSecurityCode(lineDate[i]);
            security.setSecurityName(lineDate[++i]);
            summary.setSecurityName(lineDate[i]);
            security.setTransferDate(DateUtil.isDate(lineDate[++i]));
            summary.setTransferDate(DateUtil.isDate(lineDate[i]));

            summary.setPrice(lineDate[++i] == null ? null : Double.valueOf((String) lineDate[i]));
            summary.setYield(lineDate[++i] == null ? null : Double.valueOf((String) lineDate[i]));
            summary.setWal(lineDate[++i] == null ? null : Double.valueOf((String) lineDate[i]));
            summary.setBeginBalance(lineDate[++i] == null ? null : Double.valueOf((String) lineDate[i]));
            summary.setPrincipalPaid(lineDate[++i] == null ? null : Double.valueOf((String) lineDate[i]));
            summary.setInterestPaid(lineDate[++i] == null ? null : Double.valueOf((String) lineDate[i]));
            ++i;
            summary.setNotional(lineDate[++i] == null ? null : Double.valueOf((String) lineDate[i]));
            ++i;
            summary.setRating(lineDate[++i]);
            absSecurityList.add(security);
            summaryList.add(summary);
            //300条批量导入
            if (j == csvList.size() - 1 || absSecurityList.size() >= 300) {
                totalSecurityList.addAll(absSecurityList);
                if (totalSecurityList.size() > 2000) {
                    totalSecurityList = totalSecurityList.stream().sorted(Comparator.comparing(AbsSecurityEntity::getTransferDate)).collect(Collectors.toList());
                    totalSecurityList.subList(1, totalSecurityList.size() - 1000).clear();
                }

                for (AbsSecurityEntity entity : absSecurityList) {
                    entity.setType("default");
                }
                absSecurityDao.batchAddAbsSecurity(absSecurityList);
                absSecuritySummaryDao.batchAddAbsSecuritySummary(summaryList);
                absSecurityList.clear();
                summaryList.clear();
            }
        }
    } catch (Exception e) {
        logger.error("指数历史数据都 error :" + e);
        throw new BizException("第： " + (j + 2) + "行 , : " + i + " 列,数据格式有误");
    }
}

public static List<String> transCsvToList(File file) {
    List<String> dataList = new ArrayList<String>();
    BufferedReader br = null;
    try {
        InputStreamReader isr = new InputStreamReader(new FileInputStream(file), "UTF-8");
        br = new BufferedReader(new BufferedReader(isr));
        //  br = new BufferedReader(new FileReader(file));
        String line = "";
        while ((line = br.readLine()) != null) {
            dataList.add(line);
        }
    } catch (Exception e) {
    } finally {
        if (br != null) {
            try {
                br.close();
                br = null;
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    List<String> subList = dataList.subList(1, dataList.size());
    return subList;
}