这几天已在做处理导出pdf文件的功能，摸索了几天总算可以了。记录下这几天遇到的问题。

1.网上基本都是基于Itext5和Itext7来处理的。我最终是在Itext5上成功了，itext7应该是模板出问题了，在写的test方法里面测试时候，总是 找不到 pdf文档里面的form表单内容。因为需要使用adobe acrobat reader dc 来制作模板，而我没有这个。一直导致失败。

2.最终成功是参考这个文档：

https://blog.csdn.net/yi2419808933/article/details/52469241

https://blog.csdn.net/yi2419808933/article/details/52469241

3.贴上最终代码

 /*** 导出对账单* @return*/@RequestMapping("/exportSupplierFeeData")@ResponseBody@MasterSlaveConfigs(configs={@MasterSlaveConfig(databaseTag="mdbcarmanage-DataSource",mode= DynamicRoutingDataSource.DataSourceMode.SLAVE)} )public AjaxResponse exportSupplierFeeData(HttpServletRequest request, HttpServletResponse response,ServletOutputStream outputStream,Integer cityId, Integer supplierId,Integer status, Integer amountStatus, String settleStartDate,String settleEndDate, String paymentStartTime, String paymentEndTime, String feeOrderNo){logger.info(MessageFormat.format("查询司机线上化入参:cityId:%s,supplierId:%s,status:%s," +"amountStatus:%s,settleStartDate:%s,settleEndDate:%s,paymentStartTime:%s,paymentEndTime:%s",cityId,supplierId,status,amountStatus,settleStartDate,settleEndDate,paymentStartTime,paymentEndTime));response.setContentType("application/pdf;charset=ISO8859-1");response.setHeader("Content-disposition", "attachment; filename="+"supplierFeePDF-1.pdf");SupplierFeeManageDto feeManageDto = new SupplierFeeManageDto();feeManageDto.setCityId(cityId);feeManageDto.setSettleStartDate(settleStartDate);feeManageDto.setSettleEndDate(settleEndDate);feeManageDto.setAmountStatus(amountStatus);feeManageDto.setStatus(status);SupplierFeeManage manage = supplierFeeService.queryByOrderNo(feeOrderNo);String[] titles = { "供应商名称1", "列名t2", "列名3", "列名4", "t5", "t6","t7"};try {ByteArrayOutputStream ba = new ByteArrayOutputStream();Document document = new Document(PageSize.A3); // Step 1—Create a Document.PdfWriter writer;writer = PdfWriter.getInstance(document, ba);document.open();document.setMargins(5, 5, 5, 5);//H 代表文字版式是横版，相应的 V 代表竖版BaseFont bfChinese = BaseFont.createFont("STSongStd-Light","UniGB-UCS2-H",BaseFont.NOT_EMBEDDED);//STSongStd-Light 是字体，在jar 中以property为后缀//参数一：新建好的字体；参数二：字体大小，参数三：字体样式，多个样式用“|”分隔Font topfont = new Font(bfChinese,14,Font.BOLD);//BaseFont bf = BaseFont.createFont("" + "fonts/simsun.ttc,0", BaseFont.IDENTITY_H,//   BaseFont.EMBEDDED);Paragraph blankRow1 = new Paragraph(18f, " ");blankRow1.setAlignment(Element.ALIGN_CENTER);PdfPTable table1 = new PdfPTable(titles.length); //创建一个表格,参数为一行有几栏int width1[] = {100,150,150,100,50,50,55};//每栏的宽度table1.setWidths(width1); //设置宽度//首行for(int i=0;i<titles.length;i++){PdfPCell cell1 = new PdfPCell(new Paragraph(titles[i],topfont));table1.addCell(cell1);}//每栏的值//PdfPCell cell1 = new PdfPCell(new Paragraph(manage.getSupplierId()));/*             PdfPTable celltable = new PdfPTable(2);cell1 = new PdfPCell(celltable);cell1.setRowspan(2);cell1.setPadding(10);table1.addCell(cell1);*/PdfPCell cell1 = new PdfPCell(new Paragraph("5555",topfont));table1.addCell(cell1);PdfPCell cell2= new PdfPCell(new Paragraph(manage.getFlowAmount(),topfont));table1.addCell(cell2);PdfPCell cell3= new PdfPCell(new Paragraph(manage.getSettleStartDate().toString(),topfont));table1.addCell(cell3);PdfPCell cell4= new PdfPCell(new Paragraph(manage.getPaymentTime().toString(),topfont));table1.addCell(cell4);PdfPCell cell5= new PdfPCell(new Paragraph(manage.getFeeOrderNo(),topfont));table1.addCell(cell5);PdfPCell cell6= new PdfPCell(new Paragraph(manage.getSupplierId().toString(),topfont));table1.addCell(cell6);PdfPCell cell7= new PdfPCell(new Paragraph(manage.getSupplierName().toString(),topfont));table1.addCell(cell7);document.add(table1);//将表格加入到document中// document.add(table2);document.add(blankRow1);document.close();ba.writeTo(outputStream);outputStream.flush();outputStream.close();ba.close(); // 导出pdf注解} catch (Exception e) {e.printStackTrace();}// 模板路径String templatePath =  "/Users/fan/workspace/mp-manage/src/main/webapp/upload/supplierFeePDF-1.pdf";// 生成的新文件路径String newPDFPath =  "/Users/fan/workspace/mp-manage/src/main/webapp/upload/supplierFeePDF-2.pdf";/* PdfReader reader;FileOutputStream out;ByteArrayOutputStream bos;PdfStamper stamper;try {out = new FileOutputStream(newPDFPath);// 输出流reader = new PdfReader(templatePath);// 读取pdf模板bos = new ByteArrayOutputStream();stamper = new PdfStamper(reader, bos);AcroFields form = stamper.getAcroFields();*//*String[] str = {manage.getSupplierName(), DateUtils.formatDate(manage.getSettleStartDate()),DateUtils.formatDate(manage.getSettleEndDate()),manage.getFlowAmount()};*//*String[] str = { "123456789", "TOP__ONE", "男", "1991-01-01", "130222111133338888", "河北省保定市" };java.util.Iterator<String> it = form.getFields().keySet().iterator();*//*for(int i = 0;i<feeManageList.size();i++){SupplierFeeManage feeManage = feeManageList.get(i);form.setField(null,feeManage.getSupplierName());}*//*int i = 0;while (it.hasNext()) {String name = it.next().toString();System.out.println(name);form.setField(name, str[i++]);}stamper.setFormFlattening(true);// 如果为false那么生成的PDF文件还能编辑，一定要设为truestamper.close();Document doc = new Document();PdfCopy copy = new PdfCopy(doc, out);doc.open();PdfImportedPage importPage = copy.getImportedPage(new PdfReader(bos.toByteArray()), 1);copy.addPage(importPage);doc.close();} catch (IOException e) {System.out.println(1);} catch (DocumentException e) {System.out.println(2);}
*/return null;}