带逗号的字符串组装成List集合

private List<FileUrlDto> buildFileUrlMethod(String fileUrl,String fileName){
    List<String> files = new ArrayList<>();
    List<String> fileNames = new ArrayList<>();
    List<FileUrlDto> fileUrlDtoList = new ArrayList<>();
    if (PublicUtil.isNotEmpty(fileUrl)) {
        files = Arrays.asList(StringUtils.commaDelimitedListToStringArray(fileUrl));

    }
    if (PublicUtil.isNotEmpty(fileName)) {
        fileNames = Arrays.asList(StringUtils.commaDelimitedListToStringArray(fileName));
    }
    if (PublicUtil.isNotEmpty(files) && PublicUtil.isNotEmpty(fileNames)) {
        for (int i = 0; i < files.size(); i++) {
            FileUrlDto fileUrlDto = new FileUrlDto();
            fileUrlDto.setFileUrl(files.get(i));
            fileUrlDto.setFileName(fileNames.get(i));
            fileUrlDtoList.add(fileUrlDto);
        }
    }
    return fileUrlDtoList;
}


////////////////////////////////////////////////////////////////////

if (PublicUtil.isNotEmpty(entity.getFileUrls())) {
    List<String> files = new ArrayList<>();
    List<String> fileNames = new ArrayList<>();
    for (FileUrlDto items : entity.getFileUrls()) {
        files.add(items.getFileUrl());
        fileNames.add(items.getFileName());
    }
    amsAbnormalOrderRecord.setFileUrl(Joiner.on(",").join(files));
    amsAbnormalOrderRecord.setFileName(Joiner.on(",").join(fileNames));
}