private List<String> readAsXLS(String path) {
    try {
        XLS2CSV xls2csv = new XLS2CSV(path, -1);
        return xls2csv.process();
    } catch (Exception e) {
        if (e instanceof NotOLE2FileException || e instanceof NotOfficeXmlFileException || e instanceof OfficeXmlFileException) {
            throw new ExcelOperBaseException("请选择正确格式excel文件");
        }
        if (e instanceof IOException) {
            throw new ExcelOperBaseException("文件读取失败");
        }
        throw new RuntimeException(e);
    }
}
 

private List<String> readAsXLS(String path){
	try {				
		XLS2CSV xls2csv = new XLS2CSV(path, -1);
		return xls2csv.process();
	} catch (Exception e) {
		if(e instanceof NotOLE2FileException || e instanceof NotOfficeXmlFileException || e instanceof OfficeXmlFileException){
			throw new ExcelOperBaseException("请选择正确格式excel文件");
		}
		if(e instanceof IOException){
			throw new ExcelOperBaseException("文件读取失败");
		}
		throw new RuntimeException(e);
	}
}
 

private HeaderBlock(byte[] data) throws IOException {
   this._data = data.clone();
   
	// verify signature
   FileMagic fm = FileMagic.valueOf(data);
   
   switch (fm) {
   case OLE2:
       break;
   case OOXML:
          throw new OfficeXmlFileException("The supplied data appears to be in the Office 2007+ XML. "
              + "You are calling the part of POI that deals with OLE2 Office Documents. "
              + "You need to call a different part of POI to process this data (eg XSSF instead of HSSF)");
   case XML:
          throw new NotOLE2FileException("The supplied data appears to be a raw XML file. "
              + "Formats such as Office 2003 XML are not supported");
   case MSWRITE:
          throw new NotOLE2FileException("The supplied data appears to be in the old MS Write format. "
              + "Apache POI doesn't currently support this format");
      case BIFF2:
      case BIFF3:
      case BIFF4:
          throw new OldExcelFormatException("The supplied data appears to be in "+fm+" format. "
              + "HSSF only supports the BIFF8 format, try OldExcelExtractor");
   default:
          // Give a generic error if the OLE2 signature isn't found
       String exp = HexDump.longToHex(_signature);
       String act = HexDump.longToHex(LittleEndian.getLong(data, 0));
          throw new NotOLE2FileException(
              "Invalid header signature; read " + act + ", expected " + exp +
              " - Your file appears not to be a valid OLE2 document");
   }
   
	// Figure out our block size
	if (_data[30] == 12) {
		this.bigBlockSize = POIFSConstants.LARGER_BIG_BLOCK_SIZE_DETAILS;
	} else if(_data[30] == 9) {
		this.bigBlockSize = POIFSConstants.SMALLER_BIG_BLOCK_SIZE_DETAILS;
	} else {
	   throw new IOException("Unsupported blocksize  (2^"+ _data[30] + "). Expected 2^9 or 2^12.");
	}

   // Setup the fields to read and write the counts and starts
     _bat_count  = new IntegerField(_bat_count_offset, data).get();
     _property_start = new IntegerField(_property_start_offset,_data).get();
     _sbat_start = new IntegerField(_sbat_start_offset, _data).get();
     _sbat_count = new IntegerField(_sbat_block_count_offset, _data).get();
     _xbat_start = new IntegerField(_xbat_start_offset, _data).get();
     _xbat_count = new IntegerField(_xbat_count_offset, _data).get();
}