java PDF模板生成并匯出(文字、表格、圖片)

1：jar包

	<!-- itextpdf-->
	  <dependency>
	      <groupId>com.itextpdf</groupId>
	      <artifactId>itext-asian</artifactId>
	      <version>5.2.0</version>
	  </dependency>
	  <dependency>
	      <groupId>com.itextpdf</groupId>
	      <artifactId>itextpdf</artifactId>
	      <version>5.4.3</version>
	  </dependency>

2：制作一個pdf模板 創建表單–編輯域


3：工具類：

   /**
     * pdf模板匯出
     *
     * @param map
     * @param out
     * @throws Exception
     */
    public static void creatPdf(Map<String, Object> map, OutputStream out) throws Exception {
        try {
            BaseFont bf = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
            // 輸出流
//            String outPutPath = "/Users/xxx/Desktop/files/pdf模板匯出.pdf";
//            FileOutputStream out = new FileOutputStream(filePath);
            // 讀取pdf模板路徑
            PdfReader reader = new PdfReader(String.valueOf(map.get("tempPath")));
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            PdfStamper stamper = new PdfStamper(reader, bos);
            stamper.setFormFlattening(true);
            AcroFields form = stamper.getAcroFields();
            // 文字類的內容處理
            Map<String, String> datemap = (Map<String, String>) map.get("dataMap");
            form.addSubstitutionFont(bf);
            for (String key : datemap.keySet()) {
                String value = datemap.get(key);
                form.setField(key, value);
            }
            // 圖片類的內容處理
            Map<String, String> imgmap = (Map<String, String>) map.get("imgMap");
            for (String key : imgmap.keySet()) {
                String value = imgmap.get(key);
                String imgpath = value;
                int pageNo = form.getFieldPositions(key).get(0).page;
                Rectangle signRect = form.getFieldPositions(key).get(0).position;
                float x = signRect.getLeft();
                float y = signRect.getBottom();
                // 根據路徑讀取圖片
                Image image = Image.getInstance(imgpath);
                // 獲取圖片頁面
                PdfContentByte under = stamper.getOverContent(pageNo);
                // 圖片大小自適應
                image.scaleToFit(signRect.getWidth(), signRect.getHeight());
                // 添加圖片
                image.setAbsolutePosition(x, y);
                under.addImage(image);
            }
            // 表格類
            Map<String, List<List<String>>> listMap = (Map<String, List<List<String>>>) map.get("tableList");
            for (String key : listMap.keySet()) {
                List<List<String>> lists = listMap.get(key);
                int pageNo = form.getFieldPositions(key).get(0).page;
                PdfContentByte pcb = stamper.getOverContent(pageNo);
                Rectangle signRect = form.getFieldPositions(key).get(0).position;
                //表格位置
                int column = lists.get(0).size();
                int row = lists.size();
                PdfPTable table = new PdfPTable(column);
                float tatalWidth = signRect.getRight() - signRect.getLeft() - 1;
                int size = lists.get(0).size();
                float width[] = new float[size];
                for (int i = 0; i < size; i++) {
                    if (i == 0) {
                        width[i] = 60f;
                    } else {
                        width[i] = (tatalWidth - 60) / (size - 1);
                    }
                }
                table.setTotalWidth(width);
                table.setLockedWidth(true);
                table.setKeepTogether(true);
                table.setSplitLate(false);
                table.setSplitRows(true);
                Font FontProve = new Font(bf, 10, 0);
                //表格資料填寫
                for (int i = 0; i < row; i++) {
                    List<String> list = lists.get(i);
                    for (int j = 0; j < column; j++) {
                        Paragraph paragraph = new Paragraph(String.valueOf(list.get(j)), FontProve);
                        PdfPCell cell = new PdfPCell(paragraph);
                        cell.setBorderWidth(1);
                        cell.setVerticalAlignment(Element.ALIGN_CENTER);
                        cell.setHorizontalAlignment(Element.ALIGN_CENTER);
                        cell.setLeading(0, (float) 1.4);
                        table.addCell(cell);
                    }
                }
                table.writeSelectedRows(0, -1, signRect.getLeft(), signRect.getTop(), pcb);
            }
            // 如果為false，生成的PDF檔案可以編輯，如果為true，生成的PDF檔案不可以編輯
            stamper.setFormFlattening(true);
            stamper.close();
            Document doc = new Document();
            PdfCopy copy = new PdfCopy(doc, out);
            doc.open();
            int pageNum = reader.getNumberOfPages();
            for (int i = 1; i <= pageNum; i++) {
                PdfImportedPage importPage = copy.getImportedPage(new PdfReader(bos.toByteArray()), i);
                copy.addPage(importPage);
            }
            doc.close();
        } catch (IOException e) {
            System.out.println(e);
        } catch (DocumentException e) {
            System.out.println(e);
        }
    }

4：

	/**
     * 匯出資料 生成pdf
     *
     * @param response
     */
    @ApiOperation(value = "匯出資料 生成pdf")
    @GetMapping("/exportPdf")
    public void exportPdf(HttpServletResponse response) {
        // 模板路徑
        String tempPath = "/Users/xxx/IdeaProjects/test/pdf匯出模板.pdf";

        //文字類
        Map<String, String> dataMap = new HashMap<>();
        // dataMap中的key要和模板中的域名對應
        dataMap.put("userName", "測驗文字內容userName");
        // dataMap中的key要和模板中的域名對應
        dataMap.put("who", "測驗文字內容who");

        dataMap.put("demo1", "測驗文字內容demo1");
        dataMap.put("demo2", "測驗文字內容demo2");

        dataMap.put("name", "測驗文字內容名字");
        dataMap.put("address", "測驗文字內容地址");
        dataMap.put("main", "測驗文字內容主要負責人");
        dataMap.put("mobile", "測驗文字內容電話");
        dataMap.put("phone", "測驗文字內容手機號");

        //圖片
        String img = "/Users/xxx/Desktop/files/img/123.jpeg";
        Map<String, String> imgMap = new HashMap<>();
        // imgMap中的key要和模板中的域名對應
        imgMap.put("img", img);

        //表格 一行資料是一個list
        List<String> list = new ArrayList<>();
        list.add("標題");
        list.add("日期");
        list.add("金額");
        list.add("備注");

        List<String> list2 = new ArrayList<>();
        list2.add("標題");
        list2.add("2021-08-27");
        list2.add("100000");
        list2.add("");

        List<String> list3 = new ArrayList<>();
        list3.add("標題22");
        list3.add("2021-08-29");
        list3.add("200000");
        list3.add("備注");

        List<List<String>> List = new ArrayList<>();
        List.add(list);
        List.add(list2);
        List.add(list3);

        Map<String, List<List<String>>> listMap = new HashMap<>();
        // 這里的listMap中key要和模板中的域名對應
        listMap.put("item", List);

        Map<String, Object> o = new HashMap<>();
        o.put("tempPath", tempPath);
        o.put("dataMap", dataMap);
        o.put("imgMap", imgMap);
        o.put("tableList", listMap);
        try {
            OutputStream out = response.getOutputStream();
            response.setCharacterEncoding("utf-8");
            response.setHeader("content-type", "application/octet-stream");

            String date = DateUtiles.CurrentDate();

            String fileName = URLEncoder.encode("pdf模板匯出" + date + ".pdf", "UTF-8");
            response.setHeader("Content-Disposition", "attachment;filename=" + fileName);
            try {
                PdfUtils.creatPdf(o, out);
            } catch (Exception e) {
                e.printStackTrace();
            }
            out.flush();
            out.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

5: 效果