需要引入的Maven依赖:

java">  <!--    pdf替换图片    --><dependency><groupId>e-iceblue</groupId><artifactId>spire.pdf.free</artifactId><version>5.1.0</version></dependency>

java代码:

java">   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1for (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2for (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}//endregionreturn 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()));}}