需要引入的Maven依赖:

                                e-iceblue                 spire.pdf.free                 5.1.0             

java代码:

   public AjaxResult replacepdf(MultipartFile file)  {         try {             //初始化 PdfDocument 类的实例             PdfDocument doc = new PdfDocument();             PdfDocument doc1 = null;             int fileType = 0;             doc.loadFromStream(file.getInputStream());                 //加载 PDF 文档                     //region 单页模板替换                     if (doc.getPages().getCount() <= 1) {                         //获取所需的页面                         PdfPageBase page = doc.getPages().get(0);                          //region 获取原图大小  位置                         PdfImageInfo[] imagesInfo = page.getImagesInfo();                         //获取指定图片的坐标                         Rectangle2D bounds = imagesInfo[imagesInfo.length - 1].getBounds();                         double x = bounds.getX();                         double y = bounds.getY();                         double width = bounds.getWidth();                         double height = bounds.getHeight();                         //endregion                         //替换公章                         PdfImage image2 = PdfImage.fromFile(uploadPath + "//zryk//zrykseal//img//zrykseal.jpg");                         page.deleteImage(imagesInfo.length - 1);                         page.getCanvas().drawImage(image2, x + 40, y, 87, 87);                         PdfImage image = PdfImage.fromFile(uploadPath + "//zryk//zryklogo//img//zryk.jpg");                         page.replaceImage(0, image);                     }                     //endregion                  //region 文字替换                 for (Object pageFonts : doc.getPages()) {                     PdfPageBase pageF = (PdfPageBase) pageFonts;                      //region 需要替换的文字信息                     String oldPhone = "xxxx-25689581";                     String newPhone = "xxxx-4523 2358";                     String oldPhone1 = "25569861";                     String newPhone1 = "55586662";                      PdfTextFindCollection collection = pageF.findText(oldPhone, false);                     PdfTextFindCollection collection1 = pageF.findText(oldPhone1, false);                     //endregion                      // 指定替换文本                     String newText = newPhone;                     String newText1 = newPhone1;                      //region 查找并替换文本1                     for (Object findObj : collection.getFinds()) {                         PdfTextFind find = (PdfTextFind) findObj;                         // 获取文本在页面中的范围                         Rectangle2D.Float rec = (Rectangle2D.Float) find.getBounds();                         // 写入空白范围遮住原来的文本                         pageF.getCanvas().drawRectangle(PdfBrushes.getWhite(), rec);                         PdfFont font = new PdfFont(PdfFontFamily.Helvetica, 10f);// 创建字体                         pageF.getCanvas().drawString(newText, font, PdfBrushes.getBlack(), rec.getX(), rec.getY());                     }                     //endregion                      //region 查找并替换文本2                     for (Object findObj : collection1.getFinds()) {                         PdfTextFind find = (PdfTextFind) findObj;                         // 获取文本在页面中的范围                         Rectangle2D.Float rec = (Rectangle2D.Float) find.getBounds();                         // 写入空白范围遮住原来的文本                         pageF.getCanvas().drawRectangle(PdfBrushes.getWhite(), rec);                         PdfFont font = new PdfFont(PdfFontFamily.Helvetica, 10f);// 创建字体                         pageF.getCanvas().drawString(newText1, font, PdfBrushes.getBlack(), rec.getX(), rec.getY());                     }                     //endregion                  }                 //endregion              return AjaxResult.success("上传成功");         }catch(Exception e){             return AjaxResult.error("上传失败,请联系管理员",JSON.toJSON(e.getStackTrace()));          }     }