使用Java eSignature API将元数据签名添加到PDF文档

Adding and searching metadata signature functionality for your PDF documents has been introduced as part of the newly released version of GroupDocs.Signature for Java. App developers can programmatically verify encrypted QRCode text, export images as PDF, set e-signature position in Microsoft Excel documents with pixel measurement units; align text in digital signatures for Microsoft Word DOCX, PowerPoint PPTX, PDF documents and Image files within their Java applications - http://bit.ly/2BxcNTd

下面的代码片段显示了如何向PDF文件添加元数据签名:

//带有签名文本的设置选项 PdfMetadataSignOptions signMetadataOptions = new PdfMetadataSignOptions(); //指定不同的元数据签名并将其添加到选项签名集合中 //设置Author属性 PdfMetadataSignature mdSign_Author = new PdfMetadataSignature(“ Author”,“ Mr.Sherlock Holmes”); signMetadataOptions.getMetadata Signatures()。add(mdSign作者); //设定文件编号的资料 PdfMetadataSignature mdSign_DocId = new PdfMetadataSignature(“ DocumentId”,java.util.UUID.randomUUID()。toString()); signMetadataOptions.getMetadataSignatures()。add(mdSign_DocId); //签署日期的设置数据 PdfMetadataSignature mdSign_Date = new PdfMetadataSignature(“ SignDate”,new Date(),“ pdf”); signMetadataOptions.getMetadataSignatures()。add(mdSign_Date);

以下代码段用于搜索元数据签名功能:

//设置搜索选项 PdfSearchMetadataOptions searchOptions = new PdfSearchMetadataOptions(); //搜索文档 SearchResult结果= handler.search(“ SignedMetadata.pdf”,searchOptions);

from: https://dev.to//groupdocs/add-metadata-signatures-to-pdf-documents-using-the-java-esignature-api-4863

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