java操作poi生成excel.xlsx(设置下拉框)下载本地和前端下载

需求:导入excel表格,如果excel有错误,将错误的地方标红,在把数据以excel的形式写出,供用户下载
解决方案:1.以实体类的方式接收excel并解析(创建两个集合一个接收正常的数据一个接收错误的数据)
2.错误集合无论正确错误数据都要存储,并记录是否有误(错误数据拼接特殊字符作为标记,然后记录写入集合)
3.如果发现记录有错误记录,就要使用错误数据集合生成excel(对错误的数据对特殊字符截取)
4.将错误的excel生成到工程的相对的路径下,也可以上传服务器更好(下次下载前要记得清理记录),返回前端一个地址,前端点击链接进行下载

5.下面是片段代码,后面看能不能补全(公司管理很严格,你明白的)

    public static SXSSFWorkbook createExportInterviewExcel(List data, String sheetName) {
        SXSSFWorkbook sxssfWorkbook = new SXSSFWorkbook(100);
        //标题栏设置
        CellStyle style = sxssfWorkbook.createCellStyle();
        style.setWrapText(true);//自动换行
        style.setVerticalAlignment(CellStyle.VERTICAL_CENTER);//垂直居中
        style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 居左
        Font font = sxssfWorkbook.createFont();
        font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);         //字体增粗
        style.setFont(font);
        DataFormat formats = sxssfWorkbook.createDataFormat();
        style.setDataFormat(formats.getFormat("@"));//设置文本格式

        //正常格式设置
        CellStyle cellStyle = sxssfWorkbook.createCellStyle();
        //cellStyle.setWrapText(true);//自动换行
        cellStyle.setVerticalAlignment(CellStyle.VERTICAL_CENTER);//垂直居中
        cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 居左
        DataFormat format = sxssfWorkbook.createDataFormat();
        cellStyle.setDataFormat(format.getFormat("@"));//设置文本格式

        Sheet taskInfoSheet = sxssfWorkbook.createSheet(sheetName);
        DataValidationHelper helper = taskInfoSheet.getDataValidationHelper();//设置下拉框xlsx格式
//设置列宽
        taskInfoSheet.setColumnWidth(5, 256 * 21);
        taskInfoSheet.setColumnWidth(6, 256 * 15);
        taskInfoSheet.setColumnWidth(7, 256 * 15);
        taskInfoSheet.setColumnWidth(8, 256 * 20);
        taskInfoSheet.setColumnWidth(18, 256 * 20);
        // 第一行标题
        Row row_tital = taskInfoSheet.createRow(0);

        String[] keyWord = {"姓名","性别","民族", "年龄", "学历", "身份证号", "手机号",
                "在我司任职过", "岗位名", "广告名", "部门","工作地", "推荐人","推荐人电话","推荐人部门","推荐人工号", "面试安排时间","是否录用", "淘汰类型", "淘汰原因"};
        for (int i = 0; i < keyWord.length; i++) {
            Cell cell_tital_index = row_tital.createCell(i);
            cell_tital_index.setCellValue(keyWord[i]);
            cell_tital_index.setCellStyle(style);
        }

        //异常情况处理
        if (CollectionUtils.isEmpty(data) ||(CollectionUtils.isNotEmpty(data) && StringUtils.isBlank(data.get(0).getName()))) {
            return sxssfWorkbook;
        }

        // 数据行
        for (int i = 0; i < data.size(); i++) {  // 导出详情
            Row row_data = taskInfoSheet.createRow(i + 1);
            Cell cell_data_name = row_data.createCell(0);
            cell_data_name.setCellValue(data.get(i).getName());
            cell_data_name.setCellStyle(cellStyle);


            Cell cell_data_nation = row_data.createCell(1);
            cell_data_nation.setCellValue(data.get(i).getNational());
            cell_data_nation.setCellStyle(cellStyle);

            Cell cell_data_age = row_data.createCell(2);

            Integer age= null;
            if(data.get(i).getAge()!= null){
                 age = data.get(i).getAge();
            }else{
                age=1;
            }
            cell_data_age.setCellValue(age);
            cell_data_age.setCellStyle(cellStyle);


            
            //添加工作地
            Cell cell_data_location =row_data.createCell(3);
            cell_data_location.setCellValue(data.get(i).getLocation());
            cell_data_location.setCellStyle(cellStyle);

            Cell cell_data_referrer = row_data.createCell(4);
            cell_data_referrer.setCellValue(data.get(i).getReferrer());
            cell_data_referrer.setCellStyle(cellStyle);

            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
            String interviewTime = "";
            if (null != data.get(i).getInterviewTime()) {
                interviewTime = sdf.format(data.get(i).getInterviewTime());
            }
            Cell cell_data_interviewTime = row_data.createCell(5);
            cell_data_interviewTime.setCellValue(interviewTime);
            cell_data_interviewTime.setCellStyle(cellStyle);

            String[] yesOrNo = {"是", "否"};
            creatDropDownList(taskInfoSheet,helper,yesOrNo,1,200,6,6);

            String[] list = {"不符合返聘要求", "不符合公司规则", "综合素质", "其他"};
            creatDropDownList(taskInfoSheet, helper, list, 1, 200, 7, 7);
        }

        return sxssfWorkbook;
    }

    //创建下拉框
    private static void creatDropDownList(Sheet taskInfoSheet, DataValidationHelper helper, String[] list,
                                     Integer firstRow, Integer lastRow, Integer firstCol, Integer lastCol) {
        CellRangeAddressList addressList = new CellRangeAddressList(firstRow, lastRow, firstCol, lastCol);
        //设置下拉框数据
        DataValidationConstraint constraint = helper.createExplicitListConstraint(list);
        DataValidation dataValidation = helper.createValidation(constraint, addressList);
        //处理Excel兼容性问题
        if (dataValidation instanceof XSSFDataValidation) {
            dataValidation.setSuppressDropDownArrow(true);
            dataValidation.setShowErrorBox(true);
        } else {
            dataValidation.setSuppressDropDownArrow(false);
        }
        taskInfoSheet.addValidationData(dataValidation);
    }

//需求:导入excel表格,如果excel有错误,将错误的地方标红,在把数据以excel的形式写出,供用户下载
//解决方案:1.以实体类的方式接收excel并解析(创建两个集合一个接收正常的数据一个接收错误的数据)
//2.错误集合无论正确错误数据都要存储,并记录是否有误(错误数据拼接特殊字符作为标记,然后记录写入集合)
//3.如果发现记录有错误记录,就要使用错误数据集合生成excel(对错误的数据对特殊字符截取)
//4.将错误的excel生成到工程的相对的路径下(下次下载前要记得清理记录),返回前端一个地址,前端点击链接进行下载

//这个方法就是清除之前的文件夹
 private String getExportResult(SXSSFWorkbook sxssfWorkbook) {

        //删除之前文件夹下的文件
        String targetUrl = System.getProperty("export.error.result");
        File targetFile = new File(targetUrl);
        ContentUtil.deletAllFiles(targetFile);

        String fileName = null;
        try {
            fileName = System.getProperty("export.error.result") + UUID.randomUUID().toString() + ".xlsx";
            File file = new File(fileName);
            if (!file.exists()) {
                file.getParentFile().mkdirs();
            }
            FileOutputStream outputStream = new FileOutputStream(fileName);
            sxssfWorkbook.write(outputStream);
            outputStream.close();
        } catch (IOException e) {
            logger.error("OperatorInfoImportAuditResultServiceImpl下载导入错误excel表格异常", e);
            e.printStackTrace();
        }
        return fileName;
    }
 public static void deletAllFiles(File file) {
        if (file == null) {
            return;
        }
        if (file.exists()) {
            if (file.isFile()) {
                file.delete();
            }else if (file.isDirectory()) {
                File[] listFiles = file.listFiles();
                if (listFiles == null) {
                    return;
                }
                for (File file2 : listFiles) {
                    deletAllFiles(file2);
                }
               /* //递归跳出来的时候删除空文件夹
                file.delete();*/
            }
        }
    }

@RequestMapping(value = "/exportErrorImportResult", method = RequestMethod.GET)
    public void exportErrorImportResult(@RequestParam(value = "paramUrl") String paramUrl, HttpServletResponse response, HttpServletRequest request) {

        //生成错误的文档
        try {
            XSSFWorkbook workbook = null;
            File file = new File(paramUrl);
            if (file.exists()) {
                FileInputStream in = new FileInputStream(file);
                workbook = new XSSFWorkbook(in);
            } else {
                logger.info("初级员工内推导出错误的excel文件,文件不存在");
            }
            OutputStream ouputStream = response.getOutputStream();
            String fileName = "导出错误";
            fileName = URLEncoder.encode(fileName, "UTF-8");
            response.reset();
            response.setContentType("application/vnd.ms-excel");
            response.setHeader("Content-Disposition", "attachment;filename=" + fileName + ".xlsx");
            workbook.write(ouputStream);
            ouputStream.flush();
            ouputStream.close();

        } catch (Exception e) {
            logger.error("导出错误的excel文件,OperatorPostInfoController 异常:", e);
        }
    }

 

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