Encrypt and Decrypt PowerPoint document in Java

 At some point, you may want to encrypt a PowerPoint file. In this article, I will introduce how to encrypt and decrypt a PowerPoint document in Java application by using Free Spire.Presentation for Java library.

Add dependencies

First of all, you need to add needed dependencies for including Free Spire.Presentation for Java into your Java project. There are two ways to do that.

If you use maven, you need to add the following code to your project’s pom.xml file.

    <repositories> 

            <repository> 

                <id>com.e-iceblue</id> 

                <name>e-iceblue</name> 

                <url>http://repo.e-iceblue.com/nexus/content/groups/public/</url> 

            </repository> 

    </repositories> 

    <dependencies> 

        <dependency> 

            <groupId>e-iceblue</groupId> 

            <artifactId>spire.presentation.free</artifactId> 

            <version>2.6.1</version> 

        </dependency> 

    </dependencies> 

For non-maven projects, download Free Spire.Presentation for Java pack from this website and add Spire.Presentation.jar in the lib folder into your project as a dependency.

 

Using the code

Encrypt a PowerPoint document

import com.spire.presentation.FileFormat;
import com.spire.presentation.Presentation;

public class EncryptPPT {
    public static void main(String[] args) throws Exception {
        //create a Presentation instance
        Presentation presentation = new Presentation();

        //load a PPT document
        presentation.loadFromFile("Input.pptx");
       
        String strPassword = "123456";
        //encrypt the document with the password
        presentation.encrypt(strPassword);

        //save the file
        presentation.saveToFile("Encrypt.pptx", FileFormat.PPTX_2013);
    }
}

Output:

Decrypt a PowerPoint document
import com.spire.presentation.FileFormat;
import com.spire.presentation.Presentation;

public class DecryptPPT {
    public static void main(String[] args) throws Exception {
        /*//create a Presentation instance
        Presentation presentation = new Presentation();

        //load a PPT document
        presentation.loadFromFile("template.pptx");

        String strPassword = "123456";
        //encrypt the document with the password
        presentation.encrypt(strPassword);

        //save the file
        presentation.saveToFile("Encrypt.pptx", FileFormat.PPTX_2013);*/

        //create a Presentation instance
        Presentation presentation = new Presentation();

        //load an encrypted PowerPoint document with password
        presentation.loadFromFile("Encrypt.pptx", "123456");

        //remove the encryption
        presentation.removeEncryption();

        //save the file
        presentation.saveToFile("Decrypt.pptx", FileFormat.PPTX_2013);
    }
}