itextpdf PDF 文字、图片 签名

itextpdf PDF 文字、图片 签名

public class PdfElementInfo {public enum TypeEnum {UNKNOWN,TEXT,IMAGE}/*** 1. 文本* 2. 图片*/private int type;private float x;private float y;/*** 文本内容*/private String text;private float fontSize;/*** 路径*/private String imgPath;...getter & setter....
}

/*** 添加文字水印** @param inputUrl* @param outputUrl* @param elementInfoList* @param pageRange       -1 全部，空：第一页，1：第一页，1~3：第1、2、3页*/private void addElement(String inputUrl, String outputUrl, List<PdfElementInfo> elementInfoList, String... pageRange) {PdfStamper stamper = null;PdfReader reader = null;try {BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(new File(outputUrl), false));reader = new PdfReader(inputUrl);stamper = new PdfStamper(reader, bos);int total = reader.getNumberOfPages() + 1;List<Integer> pageNumList = new ArrayList<>();if (pageRange.length == 0) {pageNumList.add(1);}if (pageNumList.size() > total) {throw new CustomException("指定页，超过了PDF文件页数");}PdfContentByte content;// BaseFont base = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.EMBEDDED);// "c:\\windows\\fonts\\SIMHEI.TTF" 使用windows系统的黑体BaseFont base = BaseFont.createFont("C:\\windows\\fonts\\SIMHEI.TTF", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);PdfGState gs = new PdfGState();for (Integer pageNum : pageNumList) {content = stamper.getOverContent(pageNum);// 在内容上方加水印
//                content = stamper.getUnderContent(pageNum);//在内容下方加水印gs.setFillOpacity(0.2f);content.beginText();//content.setTextMatrix(390, 810);//内容居中，横纵坐标，偏移量//content.showTextAligned(Element.ALIGN_CENTER, "AAAA", 179.54f, 718.62f, 0);for (PdfElementInfo textInfo : elementInfoList.stream().filter(p -> p.getType() == 1).collect(Collectors.toList())) {//字体大小content.setFontAndSize(base, textInfo.getFontSize());content.showTextAligned(Element.ALIGN_CENTER, textInfo.getText(), textInfo.getX(), textInfo.getY(), 0);}for (PdfElementInfo imgInfo : elementInfoList.stream().filter(p -> p.getType() == 2).collect(Collectors.toList())) {//添加图片Image image = Image.getInstance(imgInfo.getImgPath());/*img.setAlignment(Image.LEFT | Image.TEXTWRAP);img.setBorder(Image.BOX); img.setBorderWidth(10);img.setBorderColor(BaseColor.WHITE); img.scaleToFit(100072);//大小img.setRotationDegrees(-30);//旋转*///图片的位置（坐标）image.setAbsolutePosition(imgInfo.getX(), imgInfo.getY());// image of the absolute，宽、高，取最值值进行适配image.scaleToFit(100, 100);//image.scalePercent(imgInfo.getScalePercent());//依照比例缩放. 调整缩放,控制图片大小content.addImage(image);}content.setFontAndSize(base, 8);content.endText();}} catch (Exception ex) {ex.printStackTrace();} finally {try {if (stamper != null) {stamper.close();}//关闭打开的原来PDF文件，不执行reader.close()删除不了（必须先执行stamper.close()，否则会报错）if (reader != null) {reader.close();}} catch (Exception e) {e.printStackTrace();}}}

@Testvoid testSignature() throws Exception {String inputUrl = "D:\\THOTH\\0.SyncService\\Api.22586\\Report\\Report.pdf";//生成的文件路径String outputUrl = "D:\\THOTH\\0.SyncService\\Api.22586\\Report\\Report_out_" + DateUtil.current() + ".pdf";String imageUrl = "D:\\Users\\Pictures\\R-C.png";List<PdfElementInfo> elementInfoList = new ArrayList<>();PdfElementInfo textInfo = new PdfElementInfo();textInfo.setType(PdfElementInfo.TypeEnum.TEXT.ordinal());textInfo.setFontSize(10.5f);textInfo.setX(200f);textInfo.setY(100f);textInfo.setText("张三" + DateUtil.current());elementInfoList.add(textInfo);textInfo = new PdfElementInfo();textInfo.setType(PdfElementInfo.TypeEnum.TEXT.ordinal());textInfo.setFontSize(10.5f);textInfo.setX(400f);textInfo.setY(100f);textInfo.setText("李四" + DateUtil.current());elementInfoList.add(textInfo);PdfElementInfo imgInfo = new PdfElementInfo();imgInfo.setType(PdfElementInfo.TypeEnum.IMAGE.ordinal());imgInfo.setX(100f);imgInfo.setY(200f);imgInfo.setImgPath(imageUrl);elementInfoList.add(imgInfo);addElement(inputUrl, outputUrl, elementInfoList);//删除原来的PDF文件/*File targetTemplePDF = new File(inputPDFFilePath);targetTemplePDF.delete();*/}