①获取ExcelReader

public Result dataImport(InputStream is) throws IOException {
		//根据输入流创建ExcelReader
		byte[] buffer = new byte[is.available()];
		is.read(buffer);
        InputStream wrapperInputStream = new ByteArrayInputStream(buffer);
        ExcelReader reader = ExcelUtil.getReader(wrapperInputStream);

        //读取数据
        try {
            wrapperInputStream.reset();
            return readImportData(reader, taskId);
        } finally {
            reader.close();
            wrapperInputStream.close();
            inputStream.close();
        }
    }

private Result readImportData(ExcelReader reader) {
	//获取上传的excel所有sheet
	List<Sheet> sheetList = reader.getSheets();

	//循环操作每个sheet的数据
	for (Sheet sheet : sheetList ) {
    	//设置当前要操作的sheet
    	reader.setSheet(sheet);
    	
    	//获取当前sheet的名称
		String sheetName = sheet.getSheetName();
		
		//读取当前sheet的数据,index为想要读取的某一行
		List<Object> list = reader.getRow(int index);
    }

}