PDF相关操作

1. word转pdf

       public static void wordConvertPdf(File targetFile, File file) throws Exception {
           FileOutputStream os = new FileOutputStream(file);
   		// Address是将要被转化的word文档
           Document doc = new Document(targetFile.getAbsolutePath()); 
           DocumentBuilder builder = new DocumentBuilder(doc);
           //文档主体内容设置段后和行距
           builder.moveToDocumentStart();
           builder.getParagraphFormat().setLeftIndent(12);
           builder.getParagraphFormat().setSpaceAfter(0);
           builder.moveToHeaderFooter(HeaderFooterType.HEADER_PRIMARY);
           builder.getParagraphFormat().setLineSpacing(12);
           builder.getParagraphFormat().setSpaceAfter(0);
           builder.moveToHeaderFooter(HeaderFooterType.FOOTER_PRIMARY);
           builder.getParagraphFormat().setLineSpacing(12);
           builder.getParagraphFormat().setSpaceAfter(0);
           builder.moveToDocumentStart();
           doc.save(os, SaveFormat.PDF);
           os.close();
       }
   

2. 添加图片

      private String issuedAndStamped(File file) throws Exception {
           String fileUrl = null;
           String baseUrl = Constants.docXmlTemplatePath;
           PDDocument document = null;
   
           try {
               // 加载PDF文档
               document = PDDocument.load(file);
   
               // 加载图片
               PDImageXObject logo = PDImageXObject.createFromFile(path + "logo_fsda.jpg", document);
   
               Map<String, Integer> logoMap = getImageScale(logo, 60f);
               //首页插入图片
               // 获取第一页
               PDPage firstPage = document.getPage(0);
               // 在第一页的合适位置插入图片
               PDPageContentStream contentStream = new PDPageContentStream(document, firstPage, PDPageContentStream.AppendMode.APPEND, true, true);
        		contentStream.close();
   
   
               Map<String, Double> signMap = new HashMap<>();
               PDFTextStripper stripper = new PDFTextStripper() {
                   @Override
                   protected void writeString(String string, List<TextPosition> textPositions) throws IOException {
                       //System.out.println("新的一页。。。。。。");
                       if (string.contains("编制：")||string.contains("编制:")) {
                           boolean b = false;
                           for (TextPosition text : textPositions) {
                               String textValue = text.getUnicode();
                               if (Objects.equals("制", textValue)) {
                                   b = true;
                               }
                               if ((Objects.equals("：", textValue) || Objects.equals(":", textValue)) && b) {
                                   Rectangle2D.Float boundingBox = calculateBoundingBox(text);
                                   //System.out.println("Text: " + textValue);
                                   //System.out.println("(编制)Position: x=" + boundingBox.getX() + ", y=" + boundingBox.getY());
                                   signMap.put("bzrx", boundingBox.getX());
                                   signMap.put("bzry", boundingBox.getY());
                                   break;
                               }
   
                           }
                       }
                   }
               };
   
               stripper.setSortByPosition(true);
               Writer dummy = new OutputStreamWriter(new ByteArrayOutputStream());
               // 遍历每一页
               for (PDPage page : document.getPages()) {
                   // 创建内容流
                   contentStream = new PDPageContentStream(document, page, PDPageContentStream.AppendMode.APPEND, true, true);
                   // 在页面上绘制图片
                   contentStream.drawImage(logo, 500, 775, logoMap.get("scaledWidth"), logoMap.get("scaledHeight"));
                   // 关闭内容流
                   contentStream.close();
               }
               // 保存PDF文档
               fileUrl = baseUrl + new Date().getTime() + ".pdf";
               File f = new File(fileUrl);
               if (!f.getParentFile().exists()) {
                   f.getParentFile().mkdirs();
               }
               document.save(fileUrl);
   
               // 关闭文档
               document.close();
           } catch (IOException e) {
               e.printStackTrace();
           }
   
           return fileUrl;
       }
   	private static Rectangle2D.Float calculateBoundingBox(TextPosition text) {
           float x = text.getXDirAdj();
           float y = text.getYDirAdj();
           float width = text.getWidthDirAdj();
           float height = text.getHeightDir();
           return new Rectangle2D.Float(x, y, width, height);
       }
   
       private static Map<String, Integer> getImageScale(PDImageXObject image, float v) {
           // 获取图片原始的宽度和高度
           int originalWidth = image.getWidth();
           int originalHeight = image.getHeight();
   
           // 计算缩放比例
           float scaleX = v / originalWidth;
           float scaleY = v / originalHeight;
           float scale = Math.min(scaleX, scaleY);
   
           // 计算缩放后的宽度和高度
           int scaledWidth = Math.round(originalWidth * scale);
           int scaledHeight = Math.round(originalHeight * scale);
           Map<String, Integer> map = new HashMap<>();
           map.put("scaledWidth", scaledWidth);
           map.put("scaledHeight", scaledHeight);
           return map;
       }
   
   

3. 添加水印

       private void waterMark(String inputPdfPath, String outputPdfPath) {
           try {
               String watermarkText = "FSDA";
               int interval = -5;
               PdfReader reader = new PdfReader(inputPdfPath);
               System.out.println("读取PDF文件模板完了=============================");
               PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(outputPdfPath));
   
               BaseFont base = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
   
               com.itextpdf.text.Rectangle pageRect = null;
               PdfGState gs = new PdfGState();
               gs.setFillOpacity(0.07f);  //透明度
               gs.setStrokeOpacity(0.07f);
               int total = reader.getNumberOfPages() + 1;
   
               JLabel label = new JLabel();
               FontMetrics metrics;
               int textH = 0;
               int textW = 0;
               label.setText(watermarkText);
               metrics = label.getFontMetrics(label.getFont());
               textH = metrics.getHeight();
               textW = metrics.stringWidth(label.getText());
   
               PdfContentByte under;
               for (int i = 1; i < total; i++) {
                   pageRect = reader.getPageSizeWithRotation(i);
                   under = stamper.getOverContent(i);
                   under.saveState();
                   under.setGState(gs);
                   under.beginText();
                   under.setFontAndSize(base, 10);
                   under.setTextRenderingMode(PdfContentByte.TEXT_RENDER_MODE_FILL_STROKE);
                   //你可以随心所欲的改你自己想要的角度   水印文字成30度角倾斜
                   for (int height = interval*2 + textH; height < pageRect.getHeight(); height = height + textH * 8) {
                       for (int width = interval + textW; width < pageRect.getWidth() + textW; width = (int) (width + (textW * 4))) {
                           under.showTextAligned(Element.ALIGN_LEFT, watermarkText, width - textW, height - textH, 20);
                       }
                   }
   
                   // 添加水印文字
                   under.endText();
               }
               System.out.println("PDF文件水印打印成功！路径：" + outputPdfPath);
               //说三遍
               //一定不要忘记关闭流
               //一定不要忘记关闭流
               //一定不要忘记关闭流
               stamper.close();
               reader.close();
           } catch (Exception e) {
               e.printStackTrace();
           }
       }
   

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