[移动开发]共用EasyExcel的监听器，导入csv文件

EasyExcel 不支持csv文件的导入，需要自己写逻辑处理
如何能共用EasyExcel的监听器

@Service
public class ImportCsvUtil {

    @Autowired
    private ThreadPoolTaskExecutor executor;

    public void importCsv(InputStream inputStream, AnalysisEventListener<Map<Integer,String>> readListener) throws Exception {
        BufferedReader reader = new BufferedReader(
                new InputStreamReader(inputStream,"GBK"));

        int count = 0;
        Map<Integer,String> headMap = new HashMap<>();
        while (true){
            count ++;
            String s = reader.readLine();
            if (s != null){
                // 数据头
                if (count == 1){
                    String[] split = s.split(",");
                    for (int i = 0; i < split.length; i++) {
                        headMap.put(i,specialUnicode(split[i]));
                    }
                    readListener.invokeHeadMap(headMap, null);
                }else {
                    String[] split = s.split(",");
                    Map<Integer, String> entity = new HashMap<>();
                    for (int i = 0; i < split.length; i++) {
                        entity.put(i,split[i]);
                    }
                    readListener.invoke(entity,null);
                }
            }else {
                break;
            }
        }

        readListener.doAfterAllAnalysed(null);
    }
    /**
     * 去除 字符串收尾的 特殊的Unicode [ "\uFEFF" ]
     * csv 文件可能会带有该编码
     * @param str
     * @return
     */
    public static String specialUnicode(String str){
        if (str.startsWith("\uFEFF")){
            str = str.replace("\uFEFF", "");
        }else if (str.endsWith("\uFEFF")){
            str = str.replace("\uFEFF","");
        }
        return str;
    }
}

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