SignPosition 签章位置类
package com.zhiyis.framework.util.itext; /** * 签章位置类 * @author laoliangliang * @date 18/11/24 下午1:43 */ public class SignPosition { private float x; private float y; private float width; private float height; private Integer pageNum; public Integer getPageNum() { return pageNum; } public void setPageNum(Integer pageNum) { this.pageNum = pageNum; } public float getX() { return x; } public void setX(float x) { this.x = x; } public float getY() { return y; } public void setY(float y) { this.y = y; } public float getWidth() { return width; } public void setWidth(float width) { this.width = width; } public float getHeight() { return height; } public void setHeight(float height) { this.height = height; } }SignPdf 签章类
package com.zhiyis.framework.util; import com.itextpdf.text.Image; import com.itextpdf.text.Rectangle; import com.itextpdf.text.pdf.PdfReader; import com.itextpdf.text.pdf.PdfSignatureAppearance; import com.itextpdf.text.pdf.PdfSignatureAppearance.RenderingMode; import com.itextpdf.text.pdf.PdfStamper; import com.itextpdf.text.pdf.security.*; import com.itextpdf.text.pdf.security.MakeSignature.CryptoStandard; import org.bouncycastle.jce.provider.BouncyCastleProvider; import java.io.*; import java.security.KeyStore; import java.security.PrivateKey; import java.security.Security; import java.security.cert.Certificate; import java.util.UUID; /** * 签印 */ public class SignPdf { /** * @param password 秘钥密码 * @param inputStream 秘钥文件 * @param signPdfSrc 签名的PDF文件 * @param signImage 签名图片文件 * @param x x坐标 * @param y y坐标 * @return */ public static byte[] sign(String password, InputStream inputStream, String signPdfSrc, String signImage, float x, float y,int page) { File signPdfSrcFile = new File(signPdfSrc); PdfReader reader = null; ByteArrayOutputStream signPDFData = null; PdfStamper stp = null; try { BouncyCastleProvider provider = new BouncyCastleProvider(); Security.addProvider(provider); KeyStore ks = KeyStore.getInstance("PKCS12", new BouncyCastleProvider()); // 私钥密码 为Pkcs生成证书是的私钥密码 123456 ks.load(inputStream, password.toCharArray()); String alias = (String) ks.aliases().nextElement(); PrivateKey key = (PrivateKey) ks.getKey(alias, password.toCharArray()); Certificate[] chain = ks.getCertificateChain(alias); reader = new PdfReader(signPdfSrc); signPDFData = new ByteArrayOutputStream(); // 临时pdf文件 File temp = new File(signPdfSrcFile.getParent(), System.currentTimeMillis() + ".pdf"); stp = PdfStamper.createSignature(reader, signPDFData, '\0', temp, true); stp.setFullCompression(); PdfSignatureAppearance sap = stp.getSignatureAppearance(); sap.setReason("数字签名，不可改变"); // 使用png格式透明图片 Image image = Image.getInstance(signImage); sap.setImageScale(0); sap.setSignatureGraphic(image); sap.setRenderingMode(RenderingMode.GRAPHIC); int size = 120; // 是对应x轴和y轴坐标 float lly = y; sap.setVisibleSignature(new Rectangle(x, lly, x + size, lly+size), page, UUID.randomUUID().toString().replaceAll("-", "")); stp.getWriter().setCompressionLevel(5); ExternalDigest digest = new BouncyCastleDigest(); ExternalSignature signature = new PrivateKeySignature(key, DigestAlgorithms.SHA512, provider.getName()); MakeSignature.signDetached(sap, digest, signature, chain, null, null, null, 0, CryptoStandard.CADES); stp.close(); reader.close(); return signPDFData.toByteArray(); } catch (Exception e) { e.printStackTrace(); } finally { if (signPDFData != null) { try { signPDFData.close(); } catch (IOException e) { } } if (inputStream != null) { try { inputStream.close(); } catch (IOException e) { } } } return null; } }