Java CSV文件的读取以及写入

CSV文件的读取:

InputStreamReader in = null;
        TlLog tlLog = dataMapper.selectScConfig(tid);
        System.out.println(tlLog);
        String fileName = "\\DemDecLog_CH1_" + format + ".csv";
//        String fileName = "\\DemDecLog_CH1_" + "2022" + "-" + "07" + "-" + "13" + ".csv";
        String s = null;
        try {

            in = new InputStreamReader(new FileInputStream(new File(tlLog.getFilepwd() + fileName)), "GBK");
            BufferedReader bufferedReader = new BufferedReader(in);
            String line = null;
            String s1 = bufferedReader.readLine();
            System.out.println(s1);
            while ((line = bufferedReader.readLine()) != null) {
                String[] split = line.split(",");
                CsvFile csvFile = new CsvFile();
                csvFile.setTime(split[0]);
                csvFile.setPowerFull(split[1]);
                csvFile.setPowerSignal(split[2]);
                csvFile.setEbnoDemodulation(split[3]);
                csvFile.setEbnoDecoding(split[4]);
                csvFile.setCarrierLocking(split[5]);
                csvFile.setSymbolLocking(split[6]);
                csvFile.setCarrierOffset(split[7]);
                csvFile.setSymbolOffset(split[8]);
                csvFile.setDCOffset(split[9]);
                csvFile.setAmplitudeImbalance(split[10]);
                csvFile.setPhaseImbalance(split[11]);
                csvFile.setViterbiLock1(split[12]);
                csvFile.setLockLossAccumulation1(split[13]);
                csvFile.setTotalBits1(split[14]);
                csvFile.setBitErrorNumber1(split[15]);
                csvFile.setBER1(split[16]);
                csvFile.setViterbiLock2(split[17]);
                csvFile.setLockLossAccumulation2(split[18]);
                csvFile.setTotalBits2(split[19]);
                csvFile.setBitErrorNumber2(split[20]);
                csvFile.setBER2(split[21]);
                csvFile.setFrameSynchronizationLock(split[22]);
                csvFile.setFramesReceived1(split[23]);
                csvFile.setErrorFrames1(split[24]);
                csvFile.setNumberOfFramesLost1(split[25]);
                csvFile.setBitErrorNumberOfFrameHeader1(split[26]);
                csvFile.setFrameHeaderBER1(split[27]);
                csvFile.setCrc1lock(split[28]);
                csvFile.setCrcTotal1(split[29]);
                csvFile.setCrcError(split[30]);
                csvFile.setRsLock1(split[