书接上文，本文记录iText7实现Pdf电子签章，我来为大家科普一下关于itext如何将web页面生成pdf?以下内容希望对你有帮助!
itext如何将web页面生成pdf
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http
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
<!-- 条形码、电子签章 -->
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>barcodes</artifactId>
<version>${itext7.version}</version>
</dependency>
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>hyph</artifactId>
<version>${itext7.version}</version>
</dependency>
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>font-asian</artifactId>
<version>${itext7.version}</version>
</dependency>
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>sign</artifactId>
<version>${itext7.version}</version>
</dependency>
<!-- 加密软件包 -->
<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcprov-jdk15on</artifactId>
<version>1.69</version>
</dependency>
<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcpkix-jdk15on</artifactId>
<version>1.69</version>
</dependency>
/**
* 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 jks
KeyStore 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("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...");
}
}
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");
}
作者：huanzi-qch
出处：http://www.cnblogs.com/huanzi-qch
若标题中有“转载”字样，则本文版权归原作者所有。若无转载字样，本文版权归作者所有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文链接，否则保留追究法律责任的权利.
