利用java批量给pdf加水印的方法示例

//读取原来的pdfPdfReader reader = new PdfReader("/test/" + "1.pdf");//生成以后的pdf PdfStamper stamp = new PdfStamper(reader, new FileOutputStream("/test/" + "createSamplePDF2.pdf")); int max = reader.getNumberOfPages(); //max =2; // 文字水印 for (int i = 1; i <= max; i++) { PdfContentByte over = stamp.getOverContent(i); over.beginText(); BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.WINANSI, BaseFont.EMBEDDED); over.setFontAndSize(bf, 16); over.setTextMatrix(10, 10); over.setColorFill(BaseColor.GRAY); over.showTextAligned(Element.ALIGN_LEFT, "java blog java-er.com ", 150,670, 0);// 0 0 0 表示左下脚 最后一个0是角度，0表示横着 45 表示斜着 over.endText(); }  reader.close(); stamp.close();  }