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Password change in PDF via Java SDK

API for password changing in PDF documents using Aspose.PDF Cloud Java SDK

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Aspose.PDF Cloud Java SDK Aspose.PDF Cloud Java SDK

Overview

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How to change a password in PDF via Cloud Java SDK

In order to replace passwords in PDFs via Cloud Java SDK , we’ll use Aspose.PDF Cloud Java SDK This Cloud SDK allows you to easily build cloud-based PDF creator, editor & encryption apps in Java language for various cloud platforms. Open Repository package manager, search for Aspose.PDF Cloud and install. You may also use the following command from the Package Manager Console for install it using Maven.

Add Aspose Cloud repository to your application pom.xml

Add Aspose Cloud repository


    <repositories>
        <repository>
            <id>aspose-cloud</id>
            <name>Aspose Cloud Repository</name>
            <url>https://releases.aspose.cloud/java/repo/</url>
        </repository>
    </repositories>

To install the API client library to your local Maven repository, simply execute:

Installation from Github


    mvn clean install

To deploy it to a remote Maven repository instead, configure the settings of the repository and execute:

Deploy Maven repository


    mvn clean deploy

Steps to password change in PDF via Java

Aspose.PDF Cloud developers can easily load & replace a password in PDF just in a few lines of code.

  1. Initialize the Aspose PDF API
  2. Upload your encrypted document file
  3. Call API to Password Change in Pdf document.
  4. Checks the response and logs the result.
  5. Downloads the updated file for local use.
 

Password replace in PDF using Cloud Java SDK


    package com.aspose.asposecloudpdfusecases.encrypt_decrypt;

    import java.io.File;
    import java.nio.file.Path;
    import java.nio.file.StandardCopyOption;
    import java.util.Base64;
    import com.aspose.asposecloudpdf.api.PdfApi;
    import com.aspose.asposecloudpdf.model.AsposeResponse;
    import com.aspose.asposecloudpdfusecases.AppHelper;

    public class PasswordReplace {
        public static void Change() {
            String LOCAL_FOLDER = "C:\\Samples\\";
            String REMOTE_FOLDER = "Your_Temp_Pdf_Cloud";
            String PDF_DOCUMENT = "sample_encrypted.pdf";
            String PDF_OUTPUT = "output_sample_pwd_change.pdf";

            String OWNER_PASSWORD = "Owner-Password";
            String OWNER_PASSWORD_BASE64 = Base64.getEncoder().encodeToString(OWNER_PASSWORD.getBytes());
            
            String NEW_PASSWORD = "New-User-Password";
            String NEW_PASSWORD_BASE64 = Base64.getEncoder().encodeToString(NEW_PASSWORD.getBytes());

            try{
                PdfApi pdfApi = new PdfApi(API_KEY, API_SECRET);

                // upload local PDF file to remote storage
                File file = new File(Path.of(LOCAL_FOLDER, PDF_DOCUMENT).toString());
                pdfApi.uploadFile(Path.of(REMOTE_FOLDER, PDF_DOCUMENT).toString(), file, null);
                System.out.println(String.format("File '%s' successfully uploaded!", Path.of(LOCAL_FOLDER, PDF_DOCUMENT).toString()));

                AsposeResponse response = pdfApi.postChangePasswordDocumentInStorage(PDF_DOCUMENT, OWNER_PASSWORD_BASE64, NEW_PASSWORD_BASE64, OWNER_PASSWORD_BASE64, null, REMOTE_FOLDER);
                if (response.getCode() != 200)
                    System.err.println("Error: unexpected error when changing passwords in document! '" + response.getStatus() + "'");
                else {
                    // download changed PDF file from remote folder...
                    File f = pdfApi.downloadFile(Path.of(REMOTE_FOLDER , PDF_DOCUMENT).toString(), null, null);
                    java.nio.file.Files.copy(Path.of(f.getPath()), Path.of(LOCAL_FOLDER, PDF_OUTPUT), StandardCopyOption.REPLACE_EXISTING);
                    System.out.println(String.format("File '%s' successfully dowloaded!", Path.of(LOCAL_FOLDER, PDF_OUTPUT).toString()));                
                    System.out.println("Successfully changed passwords in document ! '" + PDF_OUTPUT + "'");
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
 

Password replace in PDF via Java SDK

Change a password in a PDF document is crucial when access to its contents is restricted due to encryption. It allows authorized users to regain full control over the file, enabling editing, viewing, and content extraction. This process is especially important in workflows where secure documents must be accessed programmatically or integrated into larger systems.

Using tools like Aspose.PDF Cloud, password changing can be performed easily and securely with just the correct owner or user password. This ensures sensitive information remains protected while still allowing flexibility for those who need legitimate access.

Ultimately, password changing in a PDF enables smooth document handling and reinforces the importance of strong yet manageable document security practices. Change a password in PDF documents with Aspose.PDF Cloud Java SDK.

With our Java library you can:

  • Add PDF document’s header & footer in text or image format.
  • Add tables & text or image stamps to PDF documents.
  • Append multiple PDF documents to an existing file.
  • Work with PDF attachments, annotations, & form fields.
  • Apply encryption or decryption to PDF documents & set a password.
  • Delete all stamps & tables from a page or entire PDF document.
  • Delete a specific stamp or table from the PDF document by its ID.
  • Replace single or multiple instances of text on a PDF page or from the entire document.
  • Extensive support for converting PDF documents to various other file formats.
  • Extract various elements of PDF files & make PDF documents optimized.
  • You can try out our free Apps to test the functionality online.

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