PDF批量生成并合并为1个PDF
单个生成
/*** 根据id查询数据* @param id 数据id* @return*/private Map<String, String> queryEntityDataById(String id) {//根据id查询Box entity = BoxService.getById(id);Map<String, String> data = new HashMap<String, String>();//显示内容//iddata.put("id", entity.getJdKh());//动态生成当前时间的yymmddhh格式DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyMMddHH");String currentDate = LocalDateTime.now().format(formatter);data.put("date", currentDate);//二维码内容data.put("imsi", entity.getImsi());data.put("imei", entity.getImei());String type = entity.getType();if (type == null || type.isEmpty()) {type = "A";}data.put("type", type);return data;}//根据数据生成PDFprivate void generatePdfForData(Map<String, String> data, ByteArrayOutputStream outputStream) throws Exception {// Load the PDF templateInputStream templateStream = getClass().getResourceAsStream("/template/ddentitytemplate.pdf");PdfReader reader = new PdfReader(templateStream);PdfStamper stamper = new PdfStamper(reader, outputStream);AcroFields form = stamper.getAcroFields();String fontPath = File.separator + "font" + File.separator + "micosoftyh.ttf";BaseFont bfChinese = BaseFont.createFont(fontPath, BaseFont.IDENTITY_H, BaseFont.EMBEDDED);Map<String, AcroFields.Item> fields = form.getFields();for (String k : fields.keySet()) {form.setFieldProperty(k, "textfont", bfChinese, null);form.setFieldProperty(k, "textsize", Float.valueOf("55"), null);form.setFieldProperty(k, "textstyle", com.itextpdf.text.Font.BOLD, null);form.setFieldProperty(k, "textalign", Element.ALIGN_MIDDLE, null);}//特殊文本框字体大小重置form.setFieldProperty("$serialnumber$", "textsize", Float.valueOf("40"), null);//标签内容//IDform.setField("$id$", data.get("id"));//日期form.setField("$date$", data.get("date"));//二维码String qrContent = String.format("ID:%s\n" +"IMSI:%s\n" +"IMEI:%s\n" +"type:%s",data.get("id"), data.get("imsi"), data.get("imei"),data.get("type"));PdfContentByte cb = stamper.getOverContent(1);generateQRcode(qrContent, cb);stamper.setFormFlattening(true);stamper.close();reader.close();}
返回PDF
/*** 根据ID批量生成pdf并合并* @param ids ids集合* @return 可直接访问的pdf流文件*/@GetMapping("/generateMergePdfStream")public ResponseEntity<ByteArrayResource> generateMergePdfStream(@RequestParam String ids) {long startTime = System.currentTimeMillis();System.out.println("开始生成PDF: " + startTime);try {String[] idArray = ids.split(",");ByteArrayOutputStream mergedOutputStream = new ByteArrayOutputStream();Document mergedDocument = new Document();PdfSmartCopy copy = new PdfSmartCopy(mergedDocument, mergedOutputStream);mergedDocument.open();for (String id : idArray) {Map<String, String> data = queryEntityDataById(id.trim());ByteArrayOutputStream pdfOutputStream = new ByteArrayOutputStream();generatePdfForData(data, pdfOutputStream);System.out.println("生成的PDF文件大小: " + pdfOutputStream.size());PdfReader reader = new PdfReader(new ByteArrayInputStream(pdfOutputStream.toByteArray()));copy.addDocument(reader);reader.close();pdfOutputStream.close();}mergedDocument.close();ByteArrayResource resource = new ByteArrayResource(mergedOutputStream.toByteArray());HttpHeaders headers = new HttpHeaders();headers.add("Content-Disposition", "inline; filename=merged.pdf");long generationEnd = System.currentTimeMillis();System.out.println("PDF生成与合并完成，总耗时: " + (generationEnd - startTime) + " 毫秒");return ResponseEntity.ok().headers(headers).contentType(MediaType.APPLICATION_PDF).body(resource);} catch (Exception e) {e.printStackTrace();return ResponseEntity.status(500).build();}}
文件保存在本地通过http接口访问pdf文件
application.properties
#访问jar包位置的同级files文件，可以直接通过http://IP:port/files下的文件名访问
spring.web.resources.static-locations=file:./files/
合并PDF并保存
/*** 生成合并的pdf文件保存到服务器下面* application.properties下面需要配置spring.web.resources.static-locations=file:./files/* jar包运行的文件夹目录* @param ids ids集合* @return 可直接访问的http://IP:Port/*.pdf*/@GetMapping("/generateentityLogPdf")public ResponseEntity generateMergeSavePdf(@RequestParam String ids, HttpServletRequest request) {try {// 分割idsString[] idArray = ids.split(",");// 输出流ByteArrayOutputStream mergedOutputStream = new ByteArrayOutputStream();Document mergedDocument = new Document();PdfCopy copy = new PdfCopy(mergedDocument, mergedOutputStream);mergedDocument.open();for (String id : idArray) {//根据id查询pdf所需要数据Map<String, String> data = queryEntityDataById(id.trim());// 根据id生成pdf数据流ByteArrayOutputStream pdfOutputStream = new ByteArrayOutputStream();generatePdfForData(data, pdfOutputStream);// 将生成的pdf数据流PdfReader reader = new PdfReader(new ByteArrayInputStream(pdfOutputStream.toByteArray()));copy.addDocument(reader);reader.close();}mergedDocument.close();//保存文件路径String currentDateDir = LocalDate.now().format(DateTimeFormatter.ofPattern("yyyyMMdd"));// 获取运行目录下的 files 目录路径String filePath = System.getProperty("user.dir") + File.separator + "files" + File.separator + currentDateDir;File directory = new File(filePath);// 检查目录是否存在，不存在则创建if (!directory.exists()) {directory.mkdirs();}// 保存文件名Random random = new Random();int randomNumber = random.nextInt(1000);String fileName = System.currentTimeMillis() + "_" + randomNumber + ".pdf";File file = new File(directory, fileName);try (FileOutputStream fos = new FileOutputStream(file)) {fos.write(mergedOutputStream.toByteArray());fos.flush();System.out.println("文件保存成功：" + file.getAbsolutePath());} catch (IOException e) {e.printStackTrace();}//返回直接访问pdf的urlString ip = request.getServerName();int port = request.getServerPort();String fileUrl = "http://" + ip + ":" + port + "/" + currentDateDir + "/" + fileName;return ResponseEntity.ok(fileUrl);} catch (Exception e) {e.printStackTrace();return ResponseEntity.status(500).build();}}
