Nowadays, more and more e-books, company contracts/agreement, academic report are in PDF file format. And for some confidential documents, setting expiration date is a very effective way to protect them. After the expiration date, the documents will be automatically destroyed. This article will demonstrate how to set an expiration date for a PDF document using Free Spire.PDF for Java.
Import jar dependency (2 Methods)
● Download the free API and unzip it. Then add the Spire.Pdf.jar file to your project as dependency.
● Directly add the jar dependency to maven project by adding the following configurations to the pom.xml.
<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.pdf.free</artifactId> <version>4.3.0</version> </dependency> </dependencies> Code Snippet
import com.spire.pdf.FileFormat; import com.spire.pdf.PdfDocument; import com.spire.pdf.actions.PdfJavaScriptAction; public class ExpiryDate { public static void main(String[] args) { //Create a PdfDocument object PdfDocument doc = new PdfDocument(); //Load a PDF file doc.loadFromFile("C:\\Users\\Administrator\\Desktop\\Moon.pdf"); //Set expiration date and warning information,and close the document through JavaScript String javaScript = "var rightNow = new Date();" + "var endDate = new Date('June 30, 2021 23:59:59');" + "if(rightNow.getTime() > endDate)" + "app.alert('This document is no longer valid, please contact us for a updated one.',1);" + "this.closeDoc();"; //Create a PdfJavaScriptAction object based on the javascript PdfJavaScriptAction js = new PdfJavaScriptAction(javaScript); //Set PdfJavaScriptAction as the AfterOpenAction doc.setAfterOpenAction(js); //Save to file doc.saveToFile("ExpirationDate.pdf", FileFormat.PDF); } } 
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