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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