Sign Documents with Gradient Brush in Java Using GroupDocs.Signature

In today’s digital age, securely signing documents is vital for efficiency across industries. This tutorial guides you through digitally signing documents with a gradient brush effect using GroupDocs.Signature for Java.

What You’ll Learn

  • Setting up GroupDocs.Signature for Java
  • Implementing a text image signature with a linear gradient brush
  • Customizing your digital signature’s appearance and positioning
  • Best practices for optimizing performance in Java applications

Let’s explore how to add this feature to your projects effortlessly.

Prerequisites

Before starting, ensure you have:

  • Java Development Kit (JDK): Version 8 or higher.
  • IDE: Use IntelliJ IDEA or Eclipse for code writing and execution.
  • GroupDocs.Signature for Java Library: Include this library using Maven, Gradle, or by downloading the JAR file directly.

Required Libraries

For Maven:

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

For Gradle:

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

License Acquisition

Obtain a free trial or temporary license from GroupDocs to access full library capabilities.

Setting Up GroupDocs.Signature for Java

To start, install and configure GroupDocs.Signature in your project:

  1. Download: If not using Maven/Gradle, get the latest version from GroupDocs Signatures releases.
  2. License Setup: Acquire a free trial or temporary license to lift evaluation limitations.
  3. Basic Initialization:
    • Import necessary classes.
    • Initialize the Signature object with your document path.
import com.groupdocs.signature.Signature;
// Other imports...

try {
    Signature signature = new Signature("YOUR_DOCUMENT_DIRECTORY/SAMPLE_PDF");
} catch (Exception e) {
    // Handle exceptions appropriately
}

Implementation Guide

Sign Document with Text Image and Gradient Brush

Enhance your digital signatures using text combined with a linear gradient brush for visual appeal.

Initialize Signature Options

Define TextSignOptions:

import com.groupdocs.signature.domain.enums.HorizontalAlignment;
import com.groupdocs.signature.domain.enums.VerticalAlignment;
// Other imports...

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

Customize Background with Gradient Brush

Apply a linear gradient brush to make your signature stand out:

import com.groupdocs.signature.domain.Background;
import com.groupdocs.signature.domain.extensions.LinearGradientBrush;

Background background = new Background();
background.setColor(Color.GREEN);
background.setTransparency(0.5f);

// Create the LinearGradientBrush with start and end colors.
LinearGradientBrush brush = new LinearGradientBrush(
    Color.GREEN,  // Start color
    Color.WHITE,  // End color
    45);          // Angle

background.setBrush(brush);
options.setBackground(background);

Set Signature Positioning

Position your signature on the document appropriately:

options.setHeight(80);
options.setVerticalAlignment(VerticalAlignment.Center);
options.setHorizontalAlignment(HorizontalAlignment.Center);

// Define margins using Padding
Padding padding = new Padding();
padding.setTop(20);
padding.setRight(20);
options.setMargin(padding);

Apply Signature

Sign the document and save it:

try {
    signature.sign("YOUR_OUTPUT_DIRECTORY/SignedLinearGradientBrush.pdf\