java根据模板生成PDF

首先你的制作一个pdf模板：

1.先用word做出模板界面

画单元格的时候需要考虑值的长度，像这里的状态可能会很长

2.文件另存为pdf格式文件

使用福昕PDF 打开，添加文本，以及需要添加值的地方，设置文本域，这个就是属性值

保存以后会生成PDF封面，需要去掉。

在线分封PDF

https://smallpdf.com/cn/result#r=1d5e4fbd858366eb5e4abe33a71ba648&t=split

代码

 @GetMapping("/downOrderDashboard/{orderNo}")
    @ApiAuthority
    public ResponseEntity<byte[]> downOrderDashboard(@PathVariable String orderNo,
                                                     HttpServletResponse response,
                                                     HttpServletRequest request) throws Exception {
        ByteArrayOutputStream byteArrayOutputStream = serialNumberService.downOrderDashboard(orderNo, request);
        HttpHeaders httpHeaders = new HttpHeaders();
        httpHeaders.setContentDispositionFormData("attachment", java.net.URLEncoder.encode("orderDB.pdf", "UTF-8"));
        httpHeaders.setContentType(MediaType.parseMediaType("application/pdf"));

        byte[] bytes = byteArrayOutputStream.toByteArray();
        return new ResponseEntity<byte[]>(bytes, httpHeaders,
            HttpStatus.CREATED);

        /*response.setContentType("application/pdf");
        response.setContentLength(byteArrayOutputStream.size());
        ServletOutputStream out = response.getOutputStream();
        byteArrayOutputStream.writeTo(out);
        out.flush();*/
    }

public ByteArrayOutputStream downOrderDashboard(String orderNo, HttpServletRequest request) {
        log.info("orderNo=" + orderNo);
        ByteArrayOutputStream outputstream = null;
        OrderDBDTO orderDashBoard = getOrderDashBoard(orderNo);
        log.info("orderDashBoard" + orderDashBoard.toString());
        try {
            //InputStream inputStream = Thread.currentThread().getContextClassLoader().getResourceAsStream("classpath:pdf/orderDB.pdf");

            ClassPathResource classPathResource = new ClassPathResource("pdf/orderDB.pdf");
            InputStream inputStream =classPathResource.getInputStream();
            //File file = ResourceUtils.getFile("classpath:pdf/orderDB.pdf");
            //String currentPath = request.getServletContext().getRealPath("\\");
            //String TemplatePDF = currentPath + "resources\\"+ "pdf\\" + "orderDB.pdf";
            log.info("inputStream"+inputStream);
            PdfReader reader = new PdfReader(inputStream);
            //new PdfReader(file.getAbsolutePath());
            outputstream = new ByteArrayOutputStream(4096);
            PdfStamper stamp = new PdfStamper(reader, outputstream);
            PdfContentByte under = stamp.getUnderContent(1); /*使用中文字体*/
            BaseFont bf = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
           // Font FontChinese = new Font(bf, 10, Font.NORMAL);
            AcroFields form = stamp.getAcroFields();
            form.addSubstitutionFont(bf);  //简宋体
            form.setField("productionOrderNo", orderDashBoard.getProductionOrderNo());

            OrderStatusType[] values = OrderStatusType.values();
            for (OrderStatusType value : values) {
                if(orderDashBoard.getStatus().equals(value.getResourceKey())){
                    form.setField("state",value.getResourceKey() );
                }
            }

            form.setField("batchNo", orderDashBoard.getBatchNo());
            form.setField("lineName", orderDashBoard.getLineName());
            form.setField("productionDate", orderDashBoard.getProductionDate().format(DateTimeFormatter.ISO_LOCAL_DATE));
            form.setField("expiryDate", orderDashBoard.getExpiryDate().format(DateTimeFormatter.ISO_LOCAL_DATE));
            List<OrderSn> orderSnList = orderDashBoard.getOrderSnList();
            for (int i = 0; i < orderSnList.size(); i++) {
                form.setField("aggregationLevel"+(i+1), orderSnList.get(i).getAggreLevelName());
                form.setField("productCount"+(i+1), orderSnList.get(i).getProductCount()+"");
                form.setField("breakCount"+(i+1), orderSnList.get(i).getBreakCount()+"");
                form.setField("sampleCount"+(i+1), orderSnList.get(i).getSampleCount()+"");
            }

            stamp.setFormFlattening(true);
            stamp.close();
            reader.close();
        } catch (DocumentException e1) {
            log.info(e1.getMessage());
            e1.printStackTrace();
        } catch (IOException e2) {
            log.info(e2.getMessage());
            e2.printStackTrace();
        }

        return outputstream;
    }

原文地址：https://www.cnblogs.com/lyon91/p/11184961.html