pdf导出    动态添加模板页

需求 ：财务将费用写入pdf模版交给客户确认。

使用的PdfStamper，即扣模板。模板上通过工具设置上name属性名

template.png

我使用的Wondershare PDFelement（Mac版）编辑的表单；
这种扣模版的实现方式灵活性比较低，不利于后期维护

使用jar包 ：

jar.png

下面是代码部分

//模板路径
String filePath = request.getSession().getServletContext().getRealPath("/Files/Temp/Export/AFSStatement.pdf");
      //  定义输出流数组，每页作为一个单独的流
      ByteArrayOutputStream bos[] = null;
      if (financialStatisticsQueryList != null && financialStatisticsQueryList.size() > 0) {
          double usd = 0, unUsd = 0, sumUsd = 0, sumUnWriteOffUsd = 0;
          //每页放25条数据
          int pageNum = (int) Math.ceil(Double.valueOf(financialStatisticsQueryList.size()) / Double.valueOf(25));
          bos = new ByteArrayOutputStream[pageNum];

          int row = 1;
          for (int k = 0; k < pageNum; k++) {
              bos[k] = new ByteArrayOutputStream();
              PdfReader reader = new PdfReader(filePath);// 读取pdf模板
              PdfStamper stamper = new PdfStamper(reader, bos[k]); //生成输出流
              AcroFields af = stamper.getAcroFields(); //获取文本域
              //使用微软雅黑字体显示中文
              BaseFont baseFont = BaseFont.createFont("STSongStd-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
              ArrayList<BaseFont> fontArrayList = new ArrayList<BaseFont>();
              fontArrayList.add(baseFont);
              af.setSubstitutionFonts(fontArrayList);
              af.setField("page", (k+1) + "-" + pageNum);
              af.setField("clearingUnitName", financialStatisticsQueryList.get(0).getClearingUnitName());//结算单位名称
              af.setField("address", financialStatisticsQueryList.get(0).getAddress());//结算单位地址
              SimpleDateFormat sdf = new SimpleDateFormat("dd-MMM-yyyy",Locale.ENGLISH);
              af.setField("date", sdf.format(new Date()));//导出时间
              String dueDate = "";
              int size = (financialStatisticsQueryList.size() - 25 * k) < 26 ? financialStatisticsQueryList.size() - 25 * k : 25;

              for (int i = 25*k,j = 0; j < size; i++,j++) {
                  usd = financialStatisticsQueryList.get(i).getTotalAmountUSD();
                  unUsd = financialStatisticsQueryList.get(i).getAmount();
                  //获取Due Date
                  if (financialStatisticsQueryList.get(i).getEtd() != null) {
                      dueDate = getLastDayOfMonth(financialStatisticsQueryList.get(i).getEtd());
                  }
                  af.setField("invNo" + row, financialStatisticsQueryList.get(i).getBusinessNum() != null ? financialStatisticsQueryList.get(i).getBusinessNum() : "");//业务编号
                  af.setField("invDate" + row, financialStatisticsQueryList.get(i).getEtd() != null ? sdf.format(financialStatisticsQueryList.get(i).getEtd()) : "");//离港日期
                  af.setField("MblNo" + row, financialStatisticsQueryList.get(i).getLadingBillNum() != null ? financialStatisticsQueryList.get(i).getLadingBillNum() : "");//提单号
                  af.setField("totalAmt" + row, String.valueOf(usd));//Total Amt
                  af.setField("unpaidAmt" + row, String.valueOf(unUsd));//Unpaid Amt
                  af.setField("dueDate" + row, dueDate);////Due Date
                  af.setField("refNo" + row, financialStatisticsQueryList.get(i).getProxyBillNum() != null ? financialStatisticsQueryList.get(i).getProxyBillNum() : "");//代理账单号

                  sumUsd = add(sumUsd, usd);
                  sumUnWriteOffUsd = add(sumUnWriteOffUsd, unUsd);
                  row++;
              }
              //下一页
              row = 1;
              if ((k+1) == pageNum) {
                  af.setField("total", "**Total**");//Total
                  af.setField("totalAmt", String.valueOf(sumUsd));//Total usd
                  af.setField("totalUnpaidAmt", String.valueOf(sumUnWriteOffUsd));//Total unpaid usd
              }
              stamper.setFormFlattening(true);

              stamper.close();
              reader.close();
          }
      }

      ByteArrayOutputStream out = new ByteArrayOutputStream();// 输出流
      Document doc = new Document();   //新建一个文档
      PdfCopy copy = new PdfCopy(doc, out); //用于保存原页面内容,然后输出
       if (bos != null) {
          doc.open();
          PdfImportedPage page;
        //复制页
          for (int i = 0; i < bos.length; i++) {
       //页数为1，一页一页复制
              page = copy.getImportedPage(new PdfReader(bos[i].toByteArray()), 1);
              copy.addPage(page);
          }
        //关闭流  
          doc.close();
          out.close();
      } else {
          //导出为空的case
          ByteArrayOutputStream outEmpty = new ByteArrayOutputStream();// 输出流
          PdfReader reader = new PdfReader(filePath);
          PdfStamper stamper = new PdfStamper(reader, outEmpty);
          AcroFields af = stamper.getAcroFields(); //获取文本域
          //使用微软雅黑字体显示中文
          BaseFont baseFont = BaseFont.createFont("STSongStd-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
          ArrayList<BaseFont> fontArrayList = new ArrayList<BaseFont>();
          fontArrayList.add(baseFont);
          af.setSubstitutionFonts(fontArrayList);
          af.setField("page", 1 + "-" + 1);
          af.setField("clearingUnitName", "");//结算单位名称
          af.setField("address", "");//结算单位地址
          SimpleDateFormat sdf = new SimpleDateFormat("dd-MMM-yyyy",Locale.ENGLISH);
          af.setField("date", sdf.format(new Date()));//导出时间
          stamper.setFormFlattening(true);
          stamper.close();
          reader.close();
          return outEmpty.toByteArray();
      }

      return out.toByteArray();

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