EasyExcel导出有下拉框的模板

最新推荐文章于 2025-03-29 19:30:00 发布

Cooker0514

最新推荐文章于 2025-03-29 19:30:00 发布

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CC 4.0 BY-SA版权

文章标签： java

本文链接：https://blog.youkuaiyun.com/Cooker0514/article/details/127535746

该博客介绍了如何在Java项目中利用EasyExcel库来创建并导出包含下拉列表的Excel模板。文章分别展示了在Controller层和自定义SheetWriteHandler中的关键代码实现。

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Conteoller层：

代码：

/**
     * 创建元数据模板
     * 导出模板
     *
     * @param response 响应
     * @throws Exception 异常
     */
    @GetMapping("/createTemplate")
    @ApiOperation(value = "模板下载")
    @WhiteApiPerms
    public void createMetadataTemplate(HttpServletResponse response) throws Exception {
        response.setContentType("application/vnd.ms-excel");
        response.setCharacterEncoding("utf-8");
        String fileName = URLEncoder.encode("服务器上传模板", "UTF-8").replaceAll("\\+", "%20");
        response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName + ".xlsx");
        EasyExcel.write(response.getOutputStream(), FwqServerExcelDto.class)
                .inMemory(Boolean.TRUE)
                .registerWriteHandler(new CustomSheetWriteHandler())
                .sheet("服务器上传模板")
                .doWrite(new ArrayList());
    }

CustomSheetWriteHandler：

代码：

public class CustomSheetWriteHandler extends AbstractCellWriteHandler {

    @Override
    public void afterCellDispose(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder,
                                 List<CellData> cellDataList, Cell cell, Head head, Integer relativeRowIndex, Boolean isHead) {
        Sheet sheet = writeSheetHolder.getSheet();



        // 数据可从数据库查询
        Map<Integer,String[]> map = new HashMap<>();
        map.put(0, new String[]{"移动", "电信", "联通", "索思", "其他"});
        map.put(3, new String[]{"使用中", "已停用", "已收回"});
        map.put(5, new String[]{"Centos", "Windows", "Ubuntu", "Debian", "Kali"});
        map.put(8, new String[]{"开启", "关闭"});
        map.put(10, new String[]{"22", "3389"});
        map.put(13, new String[]{"vpn", "堡垒机", "直接访问"});
        map.put(14, new String[]{"政务内网", "政务外网", "云服务器"});

        // 设置单元格下拉框
        for (int i = 0; i <= 17; i++){
            if (i == 0 || i == 3 || i == 5 || i == 8 || i == 10 || i == 13 || i == 14){
                CellRangeAddressList cellRangeAddressList = new CellRangeAddressList(1, 100, i, i);
                DataValidationHelper helper = sheet.getDataValidationHelper();
                DataValidationConstraint constraint = helper.createExplicitListConstraint(map.get(i));
                DataValidation dataValidation = helper.createValidation(constraint, cellRangeAddressList);
                sheet.addValidationData(dataValidation);
            }
        }
    }
}