JAVA：Excel匯入匯出詳解（3）--匯出
阿新 • • 發佈：2018-11-11
Excel匯出
一、設定查詢條件
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注意：無法通過Ajax下載
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jsp程式碼
<form class="col-sm-2" action="/manage/order/download" method="post" onsubmit="checkForm()"> <input type="submit" class="btn btn-success btn-sm " value="Excel匯出"> <input id="mainorderNum1" name="mainorderNum" value="" style="display: none"></input> <input id="phone1" name="phone" value="" style="display: none"></input> <input id="deliveryState1" name="deliveryState" value="" style="display: none"></input> <input id="orderType1" name="orderType" value="" style="display: none"></input> <input id="orderState1" name="orderState" value="" style="display: none"></input> <input id="startTime1" name="startTime" value="" style="display: none"></input> <input id="endTime1" name="endTime" value="" style="display: none"></input> <input id="goodsId1" name="goodsId" value="" style="display: none"></input> </form> -
js程式碼
二、資料庫中查詢相應的資料
- 注意
- 程式碼
/** * 下載檔案 * * @param * @return */ @RequestMapping(value = "download", method = RequestMethod.POST) public void downloadExp(HttpServletRequest request, HttpServletResponse response) { // 判斷檔案是否為空 String flag = "02";//上傳標誌 int resmsg = 0; DdOrderVo ddOrderVo = new DdOrderVo(); //獲取查詢引數 String mainorderNum = request.getParameter("mainorderNum"); String phone = request.getParameter("phone"); String deliveryState = request.getParameter("deliveryState"); String orderType = request.getParameter("orderType"); String orderState = request.getParameter("orderState"); String startTime = request.getParameter("startTime"); String endTime = request.getParameter("endTime"); String goodsId = request.getParameter("goodsId"); try { if (mainorderNum != null && mainorderNum != "") { ddOrderVo.setMainorderNum(Long.parseLong(mainorderNum)); } ddOrderVo.setPhone(phone); if (orderState != null && orderState != "") { ddOrderVo.setOrderState(Integer.parseInt(orderState)); } if (goodsId != null && goodsId != "") { ddOrderVo.setGoodsId(Long.parseLong(goodsId)); } if (orderType != null && orderType != "") { ddOrderVo.setOrderType(Integer.parseInt(orderType)); } if (deliveryState != null && deliveryState != "") { ddOrderVo.setDeliveryState(Integer.parseInt(deliveryState)); } if (startTime != null && startTime != "") { ddOrderVo.setStartTime(Timestamp.valueOf(startTime)); } if (endTime != null && endTime != "") { ddOrderVo.setEndTime(Timestamp.valueOf(endTime)); } Page<DdOrderVo> page = new Page<>(); page.setPageSize(99999); page.setPageNum(1); Page<DdOrderVo> list = ddOrderService.findByPage(ddOrderVo, page); List<ExcelSheetPO> excelSheets = new ArrayList<>(); ExcelSheetPO excelSheetPO = new ExcelSheetPO(); List<List<Object>> datalist = new ArrayList<>(); // List<String> firstline = new ArrayList<>(); String[] firstline = new String[7]; firstline[0] = "主訂單號";//mainorderNum firstline[1] = "買家姓名";//addressee firstline[2] = "買家電話";//phone firstline[3] = "買家地址";//province city district address firstline[4] = "訂單商品";//goodsName goodsNum firstline[5] = "快遞型別";//expressType firstline[6] = "面單號";//slogisticCode // datalist.add(firstline); for (DdOrderVo d : list.getResults()) { List<Object> line = new ArrayList<>(); line.add(0, d.getMainorderNum());//mainorderNum line.add(1, d.getAddressee());//addressee line.add(2, d.getPhone());//phone line.add(3, d.getProvince() + d.getCity() + d.getDistrict() + d.getAddress());//province city district address //獲得訂單商品 DdOrderGoodsVo ddOrderGoodsVo = new DdOrderGoodsVo(); ddOrderGoodsVo.setOrderNum(d.getOrderNum()); List<DdOrderGoodsVo> glist = ddOrderGoodsService.find(ddOrderGoodsVo); String gString = ""; for (DdOrderGoodsVo g : glist) { gString += g.getGoodsName() + "(" + g.getGoodsNum() + ")"; } line.add(4, gString);//goodsName goodsNum line.add(5, d.getExpressType());//expressType"快遞型別" line.add(6, d.getSlogisticCode());//slogisticCode"面單號" datalist.add(line); resmsg++; } excelSheetPO.setHeaders(firstline); excelSheetPO.setTitle("訂單列表"); excelSheetPO.setDataList(datalist); String realPath = request.getRealPath(""); String filePath = realPath + "/excelOut.xls"; // String filePath = "C://Users/Administrator/Desktop/excelOut.xls"; excelSheets.add(excelSheetPO); createWorkbookAtDisk(V2003, excelSheets, filePath); try { filePath = realPath; String downloadName = "order.xls"; String fileName = "/excelOut.xls"; FileUtil.downloadFile(filePath, downloadName, fileName, request, response); } catch (Exception e) { e.printStackTrace(); } flag = "01";//上傳成功 } catch (Exception e) { flag = "03";//上傳出錯 e.printStackTrace(); } }
三、將資料寫入Excel
- 注意
分別呼叫以下方法將查詢到的資料寫到excel中
excelSheetPO.setHeaders(firstline);
excelSheetPO.setTitle(“訂單列表”);
excelSheetPO.setDataList(datalist); - 程式碼
List<ExcelSheetPO> excelSheets = new ArrayList<>(); ExcelSheetPO excelSheetPO = new ExcelSheetPO(); List<List<Object>> datalist = new ArrayList<>(); // List<String> firstline = new ArrayList<>(); String[] firstline = new String[7]; firstline[0] = "主訂單號";//mainorderNum firstline[1] = "買家姓名";//addressee firstline[2] = "買家電話";//phone firstline[3] = "買家地址";//province city district address firstline[4] = "訂單商品";//goodsName goodsNum firstline[5] = "快遞型別";//expressType firstline[6] = "面單號";//slogisticCode // datalist.add(firstline); for (DdOrderVo d : list.getResults()) { List<Object> line = new ArrayList<>(); line.add(0, d.getMainorderNum());//mainorderNum line.add(1, d.getAddressee());//addressee line.add(2, d.getPhone());//phone line.add(3, d.getProvince() + d.getCity() + d.getDistrict() + d.getAddress());//province city district address //獲得訂單商品 DdOrderGoodsVo ddOrderGoodsVo = new DdOrderGoodsVo(); ddOrderGoodsVo.setOrderNum(d.getOrderNum()); List<DdOrderGoodsVo> glist = ddOrderGoodsService.find(ddOrderGoodsVo); String gString = ""; for (DdOrderGoodsVo g : glist) { gString += g.getGoodsName() + "(" + g.getGoodsNum() + ")"; } line.add(4, gString);//goodsName goodsNum line.add(5, d.getExpressType());//expressType"快遞型別" line.add(6, d.getSlogisticCode());//slogisticCode"面單號" datalist.add(line); resmsg++; } excelSheetPO.setHeaders(firstline); excelSheetPO.setTitle("訂單列表"); excelSheetPO.setDataList(datalist); String realPath = request.getRealPath(""); String filePath = realPath + "/excelOut.xls"; // String filePath = "C://Users/Administrator/Desktop/excelOut.xls"; excelSheets.add(excelSheetPO); createWorkbookAtDisk(V2003, excelSheets, filePath); try { filePath = realPath; String downloadName = "order.xls"; String fileName = "/excelOut.xls"; FileUtil.downloadFile(filePath, downloadName, fileName, request, response); } catch (Exception e) { e.printStackTrace(); }
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四、將Excel下載至本地
- 注意
- 程式碼
/**
* 下載檔案，是向頁面輸出流，不返回流
* @param filePath 檔案伺服器儲存目錄
* @param downloadName 下載檔案儲存的檔名
* @param fileName 伺服器儲存檔名
* @param request
* @param response
*/
@SuppressWarnings("static-access")
public static void downloadFile(String filePath,String downloadName,String fileName,HttpServletRequest request,HttpServletResponse response) throws Exception{
fileName = new java.net.URLDecoder().decode(fileName, "utf-8");
downloadName = new java.net.URLDecoder().decode(downloadName, "utf-8");
String path = filePath+fileName;
response.setContentType("application/octet-stream;charset=UTF-8");
response.setHeader("Content-Disposition", "attachment;filename=" + new String((downloadName).getBytes("GBK"), "iso8859-1"));
try {
//以流的形式下載檔案
InputStream fis = new BufferedInputStream(new FileInputStream(path));
byte[] buffer = new byte[fis.available()];
fis.read(buffer);
fis.close();
OutputStream toClient = new BufferedOutputStream(response.getOutputStream());
toClient.write(buffer);
toClient.flush();
toClient.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
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