Digitally Sign DJVU Documents in Java (Code Example)

Add Digital Signatures to DJVU in Java

Add custom digital signatures to DJVU documents in Java based on PFX certificate files. The all-in-one electronic signature API easily integrates with your Java application to give you a personalized document signing experience using a few lines of code.

Instantiate Signature with (DJVU) as input document
Instantiate DigitalSignOptions object with certificate & password details
Call sign method of Signature class and pass DigitalSignOptions to it

Work with DJVU Signature API

You require GroupDocs.Signature namespace to digitally sign documents in Java & J2SE applications. Use signature manipulation features to customize sign, search and signature verification processes, manage eSignature colors, styling and overall appearance.

Get the respective assembly files from downloads or fetch the whole package from Maven to add ‘Conholdate.Total` directly in your workspace.

Add Text Signatures to DJVU in Java

Add customized text signature to a DJVU document in Java using advanced text settings such as font color, size, name, text alignment and border adjustment.

Create a new instance of Signature class and pass input document
Instantiate the TextSignOptions object and specify text signature options
Call sign method of Signature class instance and pass TextSignOptions to it

eSign Remotely Located Documents

The document eSign API enables you to load & display remotely located documents from various cloud document storage sources such as stream, local disk, URL, FTP, Amazon S3, and Azure Blob storage. Using document information extraction feature - fetch the basic information about the source document file (DJVU) along with extracting other valuable document information such as file type, file size, pages count, page height and width etc.

Add Image Signatures to DJVU in Java

Using Conholdate.Total for Java - insert custom image as an electronic signature to a DJVU document in Java. Add company logo, stamp icon or name using different colors and text effects.

Create a new instance of Signature class and pass input document to it
Instantiate the ImageSignOptions object and specify image signature options
Call sign method of Signature class instance and pass ImageSignOptions to it

Image Representation of Document Pages

Apply digital signatures to a wide range of document formats and generate the image representation of the already signed document pages in PNG, JPG or BMP formats. You can easily preview the complete document as a whole or choose to display some specific pages based on page numbers or page ranges.

Using advanced document previewing features - easily hide digital signatures from the signed documents while generating the document preview.

What is DJVU file format?

DjVu is an open-source file format developed by LizardTech, Inc. It is mainly used for compressing and storing scanned documents, digital images and other types of documents. It is also commonly used for online sharing of documents, as its small file size makes downloading large documents faster and easier. DjVu has several advantages over other file formats. It is very efficient, compressing an average document to 1/8 or 1/10 of its original size. It is also very robust and can withstand minor errors in the transmission process. In addition, it is platform-independent and supports multiple languages, making it a suitable format for archiving documents from diverse sources. The DjVu format also supports interactive features like hyperlinks and annotations. It also allows for the embedding of other file formats such as JPEG, PNG, GIF and TIFF. DjVu files can be opened with a variety of software and web applications including Acrobat Reader, DjVuViewer and DjVuLibre. It can also be converted to other formats like PDF, TIFF and JPEG for compatibility with other programs.

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Digitally Sign DJVU in Java