Java PDF数字签名（一） - 添加数字签名

￡神魔★判官ぃ 2024-02-19 12:35 27阅读 0赞

这篇文章将介绍如何在Java应用程序中给PDF文档添加数字签名。

使用工具：

**Free Spire.PDF for JAVA**

**步骤：**

1.创建一个Java project，并添加一个class SignPDF.JAVA

2.[下载Free Spire.PDF for JAVA包][Free Spire.PDF for JAVA]并解压缩，然后从**lib**文件夹下，导入**Spire.Pdf.jar**包和**Spire.Common.jar**包到程序中：

![70][]

3.**SignPDF.JAVA**中添加代码：

import com.spire.ms.System.DateTime;
    import com.spire.pdf.FileFormat;
    import com.spire.pdf.PdfDocument;
    import com.spire.pdf.PdfPageBase;
    import com.spire.pdf.graphics.PdfImage;
    import com.spire.pdf.security.GraphicMode;
    import com.spire.pdf.security.PdfCertificate;
    import com.spire.pdf.security.PdfCertificationFlags;
    import com.spire.pdf.security.PdfSignature;
    import java.awt.geom.Rectangle2D;
    
    public class SignPDF {
        public static void main(String[] args){
            //加载PDF文档并获取第一页
            PdfDocument doc = new PdfDocument();
            doc.loadFromFile("Input.pdf");
            PdfPageBase page = doc.getPages().get(0);
    
            Rectangle2D.Float rec = new Rectangle2D.Float(100, 450, 310, 100);
    
            //Load pfx文件
            PdfCertificate certificate = new PdfCertificate("gary.pfx", "e-iceblue");
    
            //添加数字签名
            PdfSignature signature = new PdfSignature(doc, page, certificate, "signature1", rec);
    
            //设置签名详细信息
            PdfImage img = PdfImage.fromFile("E-iceblueLogo.png");
            signature.setSignImageSource(img);
            signature.setNameLabel("Signer:  ");
            signature.setName("Gary");
            signature.setContactInfoLabel("ContactInfo:  ");
            signature.setContactInfo("support@e-iceblue.com");
            signature.setDateLabel("Date:  ");
            signature.setDate(DateTime.getToday());
            signature.setLocationInfoLabel("Location:  ");
            signature.setLocationInfo("Chengdu");
            signature.setReasonLabel("Reason:  ");
            signature.setReason("The certificate of this document.");
            signature.setDistinguishedNameLabel("DL:  ");
            signature.setDistinguishedName(signature.getCertificate().get_IssuerName().getName());
            signature.setGraphicMode(GraphicMode.Sign_Image_And_Sign_Detail);
            signature.setDocumentPermissions(PdfCertificationFlags.Allow_Form_Fill);
            signature.setCertificated(true);
    
            //保存文件
            doc.saveToFile("SimpleSign.pdf", FileFormat.PDF);
        }
    }

结果文件：

![70 1][]

[Free Spire.PDF for JAVA]: http://e-iceblue.cn/Downloads/Free-Spire-PDF-JAVA.html
[70]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/64142f646f4348ad9f5309e1b53c8c03.png
[70 1]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/c7eba6add95f4e29ac690531e65a6726.png