iText7实现PDF电子签章_pdf

【iText7实现PDF电子签章】书接上文，本文记录iText7实现PDF电子签章

提前准备

1、keystore文件，生成自签名证书，猛戳：SpringBoot系列——启用https

打开cmd，执行以下命令keytool -genkeypair -alias stamper -keypass 123456 -keyalg RSA -keysize 1024 -validity 365 -keystore e:/Java/stamper.keystore -storepass 123456

2、印章图片，这里有个在线制作电子公章小工具：http://makepic.net/tool/signet.html

3、pom需要引入新依赖包

com.itextpdfbarcodes${itext7.version}com.itextpdfhyph${itext7.version}com.itextpdffont-asian${itext7.version}com.itextpdfsign${itext7.version}org.bouncycastlebcprov-jdk15on1.69org.bouncycastlebcpkix-jdk15on1.69

代码

/*** 电子签章* @param src 需要签章的pdf文件路径* @param dest 签完章的pdf文件路径*/public static void sign(String src, String dest){final String KEYSTORE = "E:\Java\stamper.keystore";//keystore文件路径final char[] PASSWORD = "123456".toCharArray();// keystore密码final String STAMPER_SRC = "E:\Java\stamper.gif";//印章图片路径try (PdfReader reader = new PdfReader(src); FileOutputStream os = new FileOutputStream(dest);){//读取keystore，获得私钥和证书链 jksKeyStore ks = KeyStore.getInstance("JKS");ks.load(new FileInputStream(KEYSTORE), PASSWORD);String alias = ks.aliases().nextElement();PrivateKey pk = (PrivateKey) ks.getKey(alias, PASSWORD);Certificate[] chain = ks.getCertificateChain(alias);//创建签章工具PdfSigner、设定数字签章的属性PdfSigner stamper = new PdfSigner(reader, os, new StampingProperties());PdfSignatureAppearance appearance = stamper.getSignatureAppearance();appearance.setReason("签名原因：系统自动签名盖章");appearance.setLocation("签名地点：xxx系统");appearance.setContact("联系方式：huanzi.qch@qq.com");//加盖图章图片ImageData img = ImageDataFactory.create(STAMPER_SRC);Image image = new Image(img);appearance.setPageNumber(1);appearance.setPageRect(new Rectangle(650, 50, image.getImageWidth(), image.getImageHeight()));appearance.setSignatureGraphic(img);appearance.setRenderingMode(PdfSignatureAppearance.RenderingMode.GRAPHIC);//No such provider: BC : 问题解决，加BC库支持Security.addProvider(new BouncyCastleProvider());//摘要算法IExternalDigest digest = new BouncyCastleDigest();//签名算法IExternalSignature signature = new PrivateKeySignature(pk, DigestAlgorithms.SHA256, BouncyCastleProvider.PROVIDER_NAME);//调用itext签名方法完成pdf签章stamper.setCertificationLevel(1);stamper.signDetached(digest,signature, chain, null, null, null, 0, PdfSigner.CryptoStandard.CMS);System.out.println("操作完成！");}catch (Exception e){e.printStackTrace();System.err.println("操作异常...");}}

效果

我们用 test() 生成的简单PDF文件来进行电子签章测试
//测试public static void main(String[] args) {//test();//html2pdf();sign("E:\Java\test.pdf","E:\Java\test2.pdf");}

版权声明

作者：huanzi-qch
出处：https://www.cnblogs.com/huanzi-qch
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iText7实现PDF电子签章

提前准备

代码

效果

版权声明

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