Easypoi 輕鬆實現複雜excel檔案匯出
阿新 • • 發佈:2020-12-15
之前做的excel檔案匯出都相對簡單,用的都是公司自己封裝的一些poi方法,匯出內容都是表頭+一行行的資料,但是這次需要匯出的excel複雜度高了不少,自己用現有方法做比較麻煩,因此引入了Easypoi 進行實現。
之所以用Easypoi我是看中了它可以直接根據現有模板填充資料實現excel生成,而模板產品已經給出,那麼接下來只需要稍微做修改就能使用,修改後的模板如圖:
對照著官方文件的示例(http://easypoi.mydoc.io/#text_226078 ) 很容易就能理解模板的使用規則
注意其中的{{$fe: 是遍歷listmap變數迴圈填充資料行,其他則是類似佔位符,很好理解
//程式碼就純粹只是把模板的佔位符和變數對應起來 Map<String, Object> map = new HashMap<String, Object>(); map.put("code", customer.getCode()); map.put("name", customer.getName()); map.put("mobile", customer.getMobile()); map.put("membershipGrade", customer.getMembershipGrade()); map.put("zzyMembershipGrade", customer.getZzyMembershipGrade()); map.put("addressComplete", customer.getAddressComplete()); List<Map<String, String>> listMap = new ArrayList<Map<String, String>>(); map.put("maplist", listMap); SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); for (MainOrderSubOrderFinanceResult financeResult : mainOrderSubOrderFinanceResults) { Map<String, String> lm = new HashMap<String, String>(); lm.put("orderCode", financeResult.getOrderCode()); lm.put("payStatusDesc", financeResult.getPayStatusDesc()); lm.put("settlementTypeDesc", financeResult.getSettlementTypeDesc()); lm.put("billDate", dateFormat.format(financeResult.getBillDate())); lm.put("totalAmount", financeResult.getTotalAmount().stripTrailingZeros().toPlainString()); lm.put("discountAmount", financeResult.getDiscountAmount().stripTrailingZeros().toPlainString()); lm.put("amount", financeResult.getAmount().stripTrailingZeros().toPlainString()); lm.put("payAmount", financeResult.getPayAmount().stripTrailingZeros().toPlainString()); lm.put("amountPaid", financeResult.getAmountPaid().stripTrailingZeros().toPlainString()); listMap.add(lm); sumTotalAmount = sumTotalAmount.add(financeResult.getTotalAmount()); sumDiscountAmount = sumDiscountAmount.add(financeResult.getDiscountAmount()); sumAmount = sumAmount.add(financeResult.getAmount()); sumPayAmount = sumPayAmount.add(financeResult.getPayAmount()); sumAmountPaid = sumAmountPaid.add(financeResult.getAmountPaid()); } map.put("sumTotalAmount", sumTotalAmount); map.put("sumDiscountAmount", sumDiscountAmount); map.put("sumAmount", sumAmount); map.put("sumPayAmount", sumPayAmount); map.put("sumAmountPaid", sumAmountPaid); //生成臨時模板檔案 String url=""; try { File temp = File.createTempFile("exportCreditBillResult", ".xlsx"); FileUploadHelper.inputStream2File(this.getClass().getClassLoader().getResourceAsStream("exportCreditBillResult.xlsx"),temp); url=temp.getAbsolutePath(); temp.deleteOnExit(); } catch (IOException e) { } TemplateExportParams params = new TemplateExportParams(url); Workbook workbook = ExcelExportUtil.exportExcel(params, map);
- 做這個功能有一個關鍵點:
由於TemplateExportParams建構函式只支援傳入檔案路徑,而直接傳入resource下的模板檔案路徑在線上環境會有問題(本地沒問題),因此需要用getResourceAsStream讀取後生成臨時檔案,再把臨時檔案url傳入