導出EXCEL的 兩個方法

方法一：

 /**
   * 導出參數模板設置，經過類似查找出來的數據
 */
    private void handleExportToExcelByLikeQuery(Page page, HttpServletResponse response) {
        try {
            List<ExworkRecordExportVo> list = new ArrayList<>();
            List<ExworksRecord> exworksRecordList = page.getList();
            if (exworksRecordList != null) {
                for (ExworksRecord e : exworksRecordList) {
                    ExworkRecordExportVo v = new ExworkRecordExportVo();
                    v.setOrderNo(e.getOrderNo());
                    v.setApplierNo(e.getApplierNo());
                    v.setApplierName(e.getApplierName());
                    v.setLeaderNo(e.getLeaderNo());
                    v.setLeaderName(e.getLeaderName());
                    v.setpInTime(e.getpInTime());
                    v.setpOutTime(e.getpOutTime());
                    switch (e.getStatus()) {
                        case "1":
                            v.setStatus("審覈中");
                            break;
                        case "2":
                            v.setStatus("已經過");
                            break;
                        case "3":
                            v.setStatus("駁回");
                            break;
                        case "4":
                            v.setStatus("廢棄");
                            break;
                        default:
                            v.setStatus("");
                            break;
                    }
                    v.setRemark(e.getRemark());
                    v.setFinishStatus("1".equals(e.getFinishStatus())?"未完成":"完成");
                    v.setCreateTime(e.getCreateTime());
                    list.add(v);
                }
            }
            ExportParams params = new ExportParams("申請列表", "申請列表", ExcelType.HSSF);
            Workbook workbook = ExcelExportUtil.exportExcel(params, ExworkRecordExportVo.class, list);
            SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
            response.setHeader("Content-disposition", "attachment; filename=" + URLEncoder.encode("申請列表--" + dateFormat.format(new Date()) + "" + ".xls", "UTF-8"));// 組裝附件名稱和格式
            ServletOutputStream out = response.getOutputStream();
            workbook.write(out);
            out.flush();
            out.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

主要用的三個jar包

import org.jeecgframework.poi.excel.ExcelExportUtil;
import org.jeecgframework.poi.excel.entity.ExportParams;
import org.jeecgframework.poi.excel.entity.enmus.ExcelType;

ExcelExportUtil.exportExcel(params, ExworkRecordExportVo.class, list); 
主要參數： 1：ExportParams 、2：實體類 ExworkRecordExportVo 3：實體類對應的list 
在封裝一下excel的名字和其餘參數便可

方法二：

public void exportConferenceEnrolChangeList(@RequestParam(required = true, value = "enrolId") Integer enrolId,
                                            @RequestParam(required = true, value = "accessToken") String accessToken, HttpServletResponse response) throws IOException {
    logger.info("*****調用 ConferenceEnrolChangeController 類 - exportConferenceEnrolChangeList 方法，參數：enrolId:" + enrolId + ", accessToken:" + accessToken);
    Assert.assertNotEmpty(accessToken, "accessToken");
    Assert.assertIntNotEmpty(enrolId, "enrolId");
    response.setHeader("Content-disposition", "attachment; filename=" + URLEncoder.encode("報名名單配置變動記錄.xls", "UTF-8"));

    // 第一步，建立一個webbook，對應一個Excel文件
    HSSFWorkbook wb = new HSSFWorkbook();
    // 第二步，在webbook中添加一個sheet,對應Excel文件中的sheet
    HSSFSheet sheet = wb.createSheet("變動記錄");
    // 第三步，在sheet中添加表頭第0行,注意老版本poi對Excel的行數列數有限制short
    HSSFRow row = sheet.createRow((int) 0);
    // 第四步，建立單元格，並設置值表頭 設置表頭居中
    HSSFCellStyle style = wb.createCellStyle();
    style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 建立一個居中格式

    HSSFCell cell = row.createCell((short) 0);
    cell.setCellValue("操做人");
    cell.setCellStyle(style);
    cell = row.createCell((short) 1);
    cell.setCellValue("mip");
    cell.setCellStyle(style);
    cell = row.createCell((short) 2);
    cell.setCellValue("單位");
    cell.setCellStyle(style);
    cell = row.createCell((short) 3);
    cell.setCellValue("部門");
    cell.setCellStyle(style);
    cell = row.createCell((short) 4);
    cell.setCellValue("變動操做");
    cell.setCellStyle(style);
    cell = row.createCell((short) 5);
    cell.setCellValue("變動內容");
    cell.setCellStyle(style);
    cell = row.createCell((short) 6);
    cell.setCellValue("變動緣由");
    cell.setCellStyle(style);

    // 第五步，寫入實體數據   service查詢數據庫獲得的list
    List<ConferenceEnrolChangeRecord> list = conferenceEnrolChangeService.getConferenceEnrolChangeListForExport(enrolId);

    for (int i = 0; i < list.size(); i++) {
        row = sheet.createRow(i + 1);
        ConferenceEnrolChangeRecord record = list.get(i);
        // 第六步，建立單元格，並設置值
        row.createCell((short) 0).setCellValue(record.getOperationName());
        row.createCell((short) 1).setCellValue(record.getMipNo());
        row.createCell((short) 2).setCellValue(record.getCompany());
        row.createCell((short) 3).setCellValue(record.getDepartment());
        row.createCell((short) 4).setCellValue(record.getChangeOperation());
        row.createCell((short) 5).setCellValue(record.getChangeContent());
        row.createCell((short) 6).setCellValue(record.getChangeReason());
    }

    try {
        ServletOutputStream out = response.getOutputStream();
        wb.write(out);
        out.flush();
        out.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

是一個接接口調用方法，建立步驟很明確，一步一步操做便可；