PDF form fields are mainly used to collect user information and I've introduced how to create form fields in PDF by using Free Spire.PDF for Java. In this article I will share how to fill each form field with value with this 3rd party free library.
Installation
Method 1: Download the Free Spire.PDF for Java and unzip it.Then add the Spire.Pdf.jar file to your project as dependency.
Method 2: You can also 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>3.9.0</version> </dependency> </dependencies> Relevant Code Snippet
import com.spire.pdf.PdfDocument; import com.spire.pdf.PdfPageBase; import com.spire.pdf.graphics.PdfBrushes; import com.spire.pdf.graphics.PdfCanvas; import com.spire.pdf.graphics.PdfPen; import com.spire.pdf.graphics.layer.PdfLayer; import java.awt.geom.Point2D; public class AddLayers { public static void main(String[] args){ //Instantiate a PdfDocument object PdfDocument pdf = new PdfDocument(); //Add a page PdfPageBase page = pdf.getPages().add(); //Add 3 layers to the page PdfLayer layer = pdf.getLayers().addLayer("red line1"); PdfCanvas canvas1 = layer.createGraphics(pdf.getPages().get(0).getCanvas()); canvas1.drawLine(new PdfPen(PdfBrushes.getRed(), 1), new Point2D.Float(50, 350), new Point2D.Float(200, 350)); layer = pdf.getLayers().addLayer("blue line1"); PdfCanvas canvas2 = layer.createGraphics(pdf.getPages().get(0).getCanvas()); canvas2.drawLine(new PdfPen(PdfBrushes.getBlue(), 1), new Point2D.Float(50, 450), new Point2D.Float(200, 450)); layer = pdf.getLayers().addLayer("green line1"); PdfCanvas canvas3 = layer.createGraphics(pdf.getPages().get(0).getCanvas()); canvas3.drawLine(new PdfPen(PdfBrushes.getGreen(), 1), new Point2D.Float(50,550), new Point2D.Float(200, 550)); //Save the resultant document pdf.saveToFile("output/addLayers.pdf"); pdf.close(); } } Output
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