Implement a Text Signature with Solid Brush in Java

Introduction

In today’s digital world, ensuring the authenticity of documents is crucial. Electronic signatures enhance security and streamline processes across industries. This tutorial guides you through implementing a text signature with a solid brush effect in PDF files using GroupDocs.Signature for Java.

What You’ll Learn

  • Set up and configure GroupDocs.Signature for Java
  • Create a text signature with a solid brush effect
  • Customize the appearance of your signature
  • Apply configurations for various document types

Let’s start by reviewing the prerequisites.

Prerequisites

Before starting, ensure you have:

Required Libraries and Versions

You’ll need GroupDocs.Signature for Java version 23.12 or later. Integrate it via Maven, Gradle, or direct download.

  • Maven Dependency:

    <dependency>
    <groupId>com.groupdocs</groupId>
    <artifactId>groupdocs-signature</artifactId>
    <version>23.12</version>
</dependency>

  • Gradle Implementation:

    implementation 'com.groupdocs:groupdocs-signature:23.12'

  • Direct Download: Obtain the latest version from GroupDocs.Signature for Java releases.

Environment Setup

Ensure your development environment is configured with a compatible Java SDK and an IDE like IntelliJ IDEA or Eclipse.

Knowledge Prerequisites

Basic familiarity with Java programming and handling PDF files programmatically will be beneficial. Experience with Maven or Gradle build systems can also help streamline the setup process.

Setting Up GroupDocs.Signature for Java

To begin, set up GroupDocs.Signature in your project environment.

  1. Integrate via Build Tools: Add dependencies to your pom.xml (Maven) or build.gradle (Gradle) as shown above.

  2. License Acquisition Steps:

    • Obtain a free trial license from GroupDocs.Signature.
    • For extended use, consider purchasing a full license.
    • Apply a temporary license if evaluating before purchase.

  3. Basic Initialization and Setup: Initialize the Signature class with your document path:

    Signature signature = new Signature("YOUR_DOCUMENT_DIRECTORY/sample.pdf");

Implementation Guide

We’ll guide you through creating a text signature using GroupDocs.Signature, focusing on setting up the solid brush effect.

Create Text Signatures

Text signatures are versatile and customizable. Here’s how to implement one:

1. Define Signature Options

Configure TextSignOptions with your desired text:

TextSignOptions options = new TextSignOptions("John Smith");

This sets “John Smith” as the signature text.

2. Customize Background Appearance

Enhance visibility by setting a background color and transparency:

Background background = new Background();
background.setColor(Color.GREEN);        // Choose your preferred background color
background.setTransparency(0.5);          // Adjust transparency for better visibility
background.setBrush(new SolidBrush(Color.LIGHT_GRAY));  // Apply solid brush effect
options.setBackground(background);
  • Color & Transparency: These attributes improve the signature’s clarity against varying document backgrounds.

3. Configure Signature Position

Align and position your text signature within the PDF:

options.setWidth(100);                  // Set width of the signature box
options.setHeight(80);                   // Set height of the signature box
options.setVerticalAlignment(VerticalAlignment.Center);
os.setHorizontalAlig

ntation(HorizontalAlignment.Center);
Padding padding = new Padding();
padding.setTop(20);                     // Add top padding for better spacing
padding.setRight(20);                   // Add right padding as needed
options.setMargin(padding);

4. Define Signature Type

Specify the signature implementation type:

options.setSignatureImplementation(TextSignatureImplementation.Image);

This allows flexibility in rendering, whether as plain text or an image.

Sign and Save Document

Finally, apply the signature to your document and save it:

signature.sign("YOUR_OUTPUT_DIRECTORY/SignedTextSignature.pdf\