RouYi(Export excel)

/**
 * 对list数据源将其里面的数据导入到excel表单
 * 
 * @param sheetName 工作表的名称
 * @return 结果
 */
public AjaxResult importTemplateExcel(String sheetName)
{
    this.init(null, sheetName, Type.IMPORT);
    return exportExcel();
}

/**
 * 对list数据源将其里面的数据导入到excel表单
 * 
 * @return 结果
 */
public AjaxResult exportExcel()
{
    OutputStream out = null;
    try
    {
        writeSheet();
        String filename = encodingFilename(sheetName);
        out = new FileOutputStream(getAbsoluteFile(filename));
        wb.write(out);
        return AjaxResult.success(filename);
    }
    catch (Exception e)
    {
        log.error("导出Excel异常{}", e.getMessage());
        throw new BusinessException("导出Excel失败，请联系网站管理员！");
    }
    finally
    {
        IOUtils.closeQuietly(wb);
        IOUtils.closeQuietly(out);
    }
}

/**
 * 编码文件名
 */
public String encodingFilename(String filename)
{
    filename = UUID.randomUUID().toString() + "_" + filename + ".xlsx";
    return filename;
}