itextpdf电子签章.zip

package com.jason.util; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.net.MalformedURLException; import java.util.ArrayList; import java.util.LinkedHashMap; import java.util.Map; import com.itextpdf.text.BaseColor; import com.itextpdf.text.Document; import com.itextpdf.text.DocumentException; import com.itextpdf.text.Element; import com.itextpdf.text.Image; import java.util.List; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import com.itextpdf.text.pdf.BaseFont; import com.itextpdf.text.pdf.PdfContentByte; import com.itextpdf.text.pdf.PdfGState; import com.itextpdf.text.pdf.PdfReader; import com.itextpdf.text.pdf.PdfStamper; /** * 电子签章工具 * @author JasonHsueh * @version 1.0, 2020-1-01 * @since 1.0, 2020-1-01 */ public class SealTools { private final static Log logger = LogFactory.getLog(SealTools.class); //电子签章 public static void addMark(String inSource,String outSource,String sealPNG){ try { //读取需要签章的文档信息 Map<String, Object> pdfMsg = getPdfMsg(inSource); //获取文件宽度，默认pdf float startAddress = Float.valueOf(SealUtils.getString(pdfMsg.get("width"))); PdfReader reader = new PdfReader(new FileInputStream(inSource)); PdfStamper stamper =new PdfStamper(reader, new FileOutputStream(outSource)); //利用关键字查找文件中的内容，确定签章的位置 List<String> keyWordsList = new ArrayList<String>(); keyWordsList.add("敏感字"); //查找关键字位置 List<List<float[]>> arrLists = SealUtils.findKeywords(keyWordsList,reader); int pageNum = SealUtils.getInt(pdfMsg.get("pageSize")); //插入水印 Image img = Image.getInstance(sealPNG); //设置尺寸 img.scaleAbsolute(90,60);// 直接设定显示尺寸 img.setBackgroundColor(new BaseColor(0)); //如果没有找到关键字，走默认位置 if(arrLists.isEmpty()){ //默认盖章位置 img.setAbsolutePosition(startAddress - 188,70); PdfContentByte overContent = stamper.getOverContent(pageNum); overContent.addImage(img); stamper.close(); reader.close(); return; } for (int i=pageNum;i>0;i--) { if(!arrLists.get(0).isEmpty()){ // 关键字所在的页码数 float pageFlag = arrLists.get(0).get(0)[2]; // 当且仅当落款和关键字在同一页时考虑同时盖章 if (pageNum == pageFlag && pageFlag == i) { img.setAbsolutePosition(arrLists.get(0).get(0)[0] - 60, arrLists.get(0).get(0)[1] - 60); } PdfContentByte under = stamper.getOverContent(i); under.addImage(img); //添加文字水印 doTextHide(under); //图片水印 doImgHide(under,sealPNG); } } stamper.close(); reader.close(); } catch (FileNotFoundException e) { logger.info("传入文件有问题！。。"+e.getMessage()); } catch (IOException e) { logger.info("文件传输错误！。。"+e.getMessage()); } catch (DocumentException e) { logger.info("解析pdf文档有问题！。。"+e.getMessage()); } } /** * 读取pdf文档信息 * @param filePath * @return */ public static Map<String, Object> getPdfMsg(String filePath) { Map<String, Object> map = new LinkedHashMap<String, Object>(); PdfReader pdfReader=null; PdfReader PdfReader=null; try { // 获取PDF共有几页 pdfReader = new PdfReader(new FileInputStream(filePath)); int pages = pdfReader.getNumberOfPages(); map.put("pageSize", pages); // 获取PDF 的宽高 PdfReader pdfreader = new PdfReader(filePath); Document document = new Document(pdfreader.getPageSize(pages)); float widths = document.getPageSize().getWidth(); // 获取页面高度 float heights = document.getPageSize().getHeight(); map.put("width", widths); map.put("height", heights); } catch (Exception e) { logger.info("出现异常:"+e.getMessage()); }finally{ if(pdfReader!=null){ pdfReader.close(); } if(PdfReader !=null){ PdfReader.close(); } } return map; } /** * 添加文字水印 * @throws IOException * @throws DocumentException */ public static void doTextHide(PdfContentByte under) throws DocumentException, IOException{ logger.info("添加文字水印！"); PdfGState gState = new PdfGState(); under.beginText(); BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA_BOLDOBLIQUE,BaseFont.WINANSI,BaseFont.NOT_CACHED); under.setFontAndSize(bf, 45); under.setTextMatrix(30, 30); under.setColorFill(BaseColor.PINK); gState.setFillOpacity(0.3f); under.setGState(gState); under.showTextAligned(Element.ALIGN_LEFT, "JASON_HSUEH", 230, 430, 45); under.endText(); } /** * 添加图片水印 * @throws IOException * @throws MalformedURLException * @throws DocumentException */ public static void doImgHide(PdfContentByte under,String path) throws MalformedURLException, IOException, DocumentException{ under.beginText(); PdfGState gState = new PdfGState(); gState.setStrokeOpacity(0.4f); Image image = Image.getInstance(path); // 设置坐标 绝对位置 X Y image.setAbsolutePosition(200, 300); // 设置旋转弧度 image.setRotation(30);// 旋转 弧度 // 设置旋转角度 image.setRotationDegrees(45);// 旋转 角度 // 设置等比缩放 image.scalePercent(90);// 依照比例缩放 // image.scaleAbsolute(200,100);//自定义大小 // 设置透明度 under.addImage(image); under.setGState(gState); under.endText(); under.stroke(); } }