EasyExcel多sheet的导入和导出

EasyExcel基础例子

EasyExcel对于导入导出的操作十分简洁，方便快捷。其中对于多单文件多sheet的操作比较不同，在此做一下记录

从多sheet中导入数据

public void importDetail(@RequestParam(value = "file") MultipartFile serviceFile) throws IOException {
    ExcelReader excelReader = null;
    InputStream in = null;
    try {
        in = serviceFile.getInputStream();
        ExcelListener excelListener = new ExcelListener();
        excelReader = EasyExcel.read(in, DetailVO.class, excelListener).build();
        //获取sheet0对象
        ReadSheet readSheet = EasyExcel.readSheet(0).build();
        //读取数据
        excelReader.read(readSheet);
        DetailVO detail = excelListener.getData();
        //清空list数据
        excelListener.getData().clear();
        //获取sheet1对象
        ReadSheet readDetailSheet = EasyExcel.readSheet(1).build();
        //读取数据
        excelReader.read(readDetailSheet);
        List<PurchaseDetailFeignParam> purchaseDetailFeignParam = ConverterUtils.convertList(excelListener.getData(), PurchaseDetailFeignParam.class);
    } catch (IOException ex) {
        logger.error("import excel to db fail", ex);
    } finally {
        in.close();
        // 这里一定别忘记关闭，读的时候会创建临时文件，到时磁盘会崩
        if (excelReader != null) {
            excelReader.finish();
        }
    }
}

导出为多sheet

 public void export(HttpServletResponse response) {
        response.setContentType("application/vnd.ms-excel");
        response.setCharacterEncoding("utf-8");
        // 这里URLEncoder.encode可以防止中文乱码
        try {
            String fileName = URLEncoder.encode("template", "UTF-8");
            response.setHeader("Content-disposition", "attachment;filename=" + fileName + ".xlsx");
            //新建ExcelWriter 
            ExcelWriter excelWriter = EasyExcel.write(response.getOutputStream()).build();
            //获取sheet0对象
            WriteSheet mainSheet = EasyExcel.writerSheet(0, "采购单").head(PurchaseVO.class).build();
            //向sheet0写入数据 传入空list这样只导出表头
            excelWriter.write(Lists.newArrayList(),mainSheet);
            //获取sheet1对象
            WriteSheet detailSheet = EasyExcel.writerSheet(1, "采购单明细").head(PurchaseDetailVO.class).build();
            //向sheet1写入数据 传入空list这样只导出表头
            excelWriter.write(Lists.newArrayList(),detailSheet);
            //关闭流
            excelWriter.finish();
        } catch (IOException e) {
            logger.error("导出异常{}", e.getMessage());
        }
    }

easyexcel对于多sheet的操作基于先获取需要操作的sheet对象=》ReadSheet和WriteSheet对象。在对制定的sheet进行操作