Teilen Sie Beispielcode für Java, um die Funktion zum Exportieren von Objektarrays über Excel zu implementieren

  <dependency>
   <groupId>org.apache.poi</groupId>
   <artifactId>poi</artifactId>
   <version>RELEASE</version>
  </dependency>

//结果返回的是写入的记录数（以下用的是自己业务场景数据）
　　public int downLoadToExcel(OutputStream outputStream,List<PaimaiMoneyVO> paimaiMoneyVOList) {
　　　　　//文档对象
  HSSFWorkbook wb = new HSSFWorkbook();
  int rowNum = 0;
  Sheet sheet = wb.createSheet("excel的标题");
  Row row0 = sheet.createRow(rowNum++);
　　　　//因为场景不同，titil不同，可以在外面写成数组当参数传进来
  row0.createCell(0).setCellValue("第一列属性名");
  row0.createCell(1).setCellValue("第二列属性名");
  row0.createCell(2).setCellValue("第三列属性名");
  row0.createCell(3).setCellValue("第四列属性名");
  row0.createCell(4).setCellValue("第五列属性名");
  row0.createCell(5).setCellValue("第六列属性名");
　　　　 if (paimaiMoneyVOList != null && paimaiMoneyVOList.size() > 0) {
   for (PaimaiMoneyVO paimaiMoneyVO : paimaiMoneyVOList) {
    Row row = sheet.createRow(rowNum++);
    row.createCell(0).setCellValue(paimaiMoneyVO.getPaimaiId());
    row.createCell(1).setCellValue(paimaiMoneyVO.getTitle());
    row.createCell(2).setCellValue(paimaiMoneyVO.getUsername());
    row.createCell(3).setCellValue(paimaiMoneyVO.getMoney()+"元");
    row.createCell(4).setCellValue("升价拍"); 
    row.createCell(5).setCellValue(bidder);
   }
  }
  try {
   wb.write(outputStream);
   LogEnum.LAW_WARE.info("表数据写入到excel表成功,一共写入了"+(rowNum - 1)+"条数据");
   outputStream.close();
  } catch (IOException e) {
   LogEnum.LAW_WARE.error("流关闭异常！", e);
  } finally {
   if (outputStream != null) {
    try {
     outputStream.close();
    } catch (IOException e) {
     LogEnum.LAW_WARE.error("流关闭异常！", e);
    }
   }
  }
  return rowNum - 1;
 }

public void exportBail(){
  this.fileName = "excel文件名";
  try {
   List<PaimaiMoneyVO> paimaiMoneyVOList = new ArrayList<>();
　　　　　　//下面是我的业务场景获取对象数组
   if(paimaiMoneySearchParam!=null){
    paimaiMoneySearchParam.setVendorId(WebHelper.getVenderId());
    paimaiMoneySearchParam.setPageSize(Constants.AUCTION_WARE_PAGE_SIZE);
    paimaiMoneySearchParam.setPage(page);
    PaimaiMoneyDto paimaiMoneyDto = auctionWareService1.searchPopPaimaiMoneyList(paimaiMoneySearchParam);
    if(paimaiMoneyDto!=null){
     int count = paimaiMoneyDto.getCount();
     int totalPage = count/ Constants.AUCTION_WARE_PAGE_SIZE + (count% Constants.AUCTION_WARE_PAGE_SIZE > 0?1:0);
     for(int i=1;i<=totalPage;i++){
      paimaiMoneySearchParam.setPage(i);
      PaimaiMoneyDto paimaiMoneyResultResult = auctionWareService1.searchPopPaimaiMoneyList(paimaiMoneySearchParam);
      if(paimaiMoneyResultResult!=null){
       paimaiMoneyVOList.addAll(paimaiMoneyResultResult.getList());
      }
     }
    }
   }
   OutputStream outputStream = response.getOutputStream();
   response.reset();//清空输出流
   //下面是对中文文件名的处理
   response.setCharacterEncoding("UTF-8");//设置相应内容的编码格式
　　　　　　　//解析浏览器
   final String userAgent = request.getHeader("USER-AGENT").toLowerCase();
   if(userAgent.contains("firefox")){ //火狐浏览器
    fileName = new String(fileName.getBytes(), "ISO8859-1");
   }else{
    fileName = URLEncoder.encode(fileName, "UTF-8"); //其他浏览器
　　　　　　　　　 fileName = fileName.Replace("+", "%20"); //encode后替换，解决空格问题（其中%20是空格在UTF-8下的编码 ，如果不这么写，浏览器会用+代替空格）
   }
   response.setHeader("Content-Disposition", "attachment;filename=" +fileName + ".xls");//指定输出文件名
   response.setContentType("application/msexcel");//定义输出类型
   int rouNum = ensurePriceListToExcel(outputStream,paimaiMoneyVOList);
   LogEnum.LAW_WARE.info("【RiseAuctionAction.downLoadEnsurePriceExcel】导出成功,一共更新了{"+rouNum+"}条记录");
  } catch (Exception e) {
   LogEnum.LAW_WARE.error("【RiseAuctionAction.downLoadEnsurePriceExcel】导出失败,error is {}", e);
  }
 }