Java용 IronPDF와 Qoppa 소프트웨어의 비교 - Java PDF 라이브러리

1.1. Installing IronPDF in Java

To include the IronPDF Library in a Java Project, there are two methods available:

1. Adding IronPDF as a dependency in a Maven-configured Java Project.
2. Downloading the IronPDF JAR File and manually adding it to the project classpath.

Both of these installation methods will be briefly explained in the following section.

Option 1: Installing IronPDF as a Maven Dependency involves adding the necessary artifacts to the dependency section of the Java project's pom.xml file.

<dependency>
    <groupId>com.ironsoftware</groupId>
    <artifactId>ironpdf</artifactId>
    <version>2023.1.1</version>
</dependency>
<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-api</artifactId>
    <version>1.7.32</version>
</dependency>

<dependency>
    <groupId>com.ironsoftware</groupId>
    <artifactId>ironpdf</artifactId>
    <version>2023.1.1</version>
</dependency>
<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-api</artifactId>
    <version>1.7.32</version>
</dependency>

The initial artifact references the most recent version of the IronPDF library for Java, while the second artifact references an SLF4J implementation. This dependency is necessary for the IronPDF rendering engine to produce logging messages during its operation. Programmers can substitute this dependency with other logging providers like Logback and Log4J or omit it entirely if logging is not needed.

To obtain the latest version of the aforementioned libraries, execute the mvn install command within a terminal at the root directory of the Java project.

Option 2: Alternatively, developers who do not wish to use Maven or other dependency management systems can manually download the IronPDF Library's JAR file (along with the optional SLF4J implementation) and add it to their project's classpath.

To download the IronPDF JAR file, access it directly from the Maven Repository.

1.2. Installing Qoppa PDF in Java

Qoppa PDF is a third-party library for working with PDF files in Java applications.

Qoppa Java PDF libraries are made available as artifacts and are hosted by Qoppa Software in a Maven Repository. With only a little POM file modification, you can simply integrate Qoppa PDF capabilities into your Maven projects and applications.

The details of Qoppa's Maven repository and the published artifacts' dependencies can be seen below.

The Qoppa repository settings and location to include in your Maven pom.xml file are as follows:

<repositories>
    <repository>
        <id>QoppaSoftware</id>
        <name>Qoppa Software</name>
        <url>http://download.qoppa.com/maven</url>
    </repository>
</repositories>

<repositories>
    <repository>
        <id>QoppaSoftware</id>
        <name>Qoppa Software</name>
        <url>http://download.qoppa.com/maven</url>
    </repository>
</repositories>

You can add one of Qoppa's JAR files as a local file to your Maven project as an alternative to using Qoppa Software's Maven Repository. Therefore, for example, if you wanted to add jPDFEditor as a local JAR, you would save the file in a system path given, such as $project.basedir/src/main/resources/, and then add jPDFEditor using the dependency listed below.

<dependencies>
    <dependency>
        <groupId>com.qoppa</groupId>
        <artifactId>jPDFEditor</artifactId>
        <version>2021R1.01</version>
        <scope>system</scope>
        <systemPath>${project.basedir}/src/main/resources/jPDFEditor.jar</systemPath>
    </dependency>
</dependencies>

<dependencies>
    <dependency>
        <groupId>com.qoppa</groupId>
        <artifactId>jPDFEditor</artifactId>
        <version>2021R1.01</version>
        <scope>system</scope>
        <systemPath>${project.basedir}/src/main/resources/jPDFEditor.jar</systemPath>
    </dependency>
</dependencies>

2.1. Manipulating PDF with IronPDF

IronPDF is a powerful tool that provides developers with the ability to process and manipulate PDF documents while respecting the document workflows. With its latest version, the tool provides end-users with various components and features to support their needs in reading and writing PDF files. In this article, we will explore how to read and write PDF files with IronPDF.

To get started, developers must first install IronPDF for Java and then import the necessary classes and start reading PDF files.

2.2. Reading PDF Files with IronPDF

After installing IronPDF, we can use its classes and Apache Tika parsers in our project. To read an existing PDF file in Java, we can use the following code:

import com.ironsoftware.ironpdf.*;

public class ReadPDFExample {
    public static void main(String[] args) {
        // Load the PDF document
        PdfDocument pdf = PdfDocument.fromFile(Paths.get("assets/sample.pdf"));
        // Extract all the text from the document
        String text = pdf.extractAllText();
        // Output the extracted text
        System.out.println(text);
    }
}

import com.ironsoftware.ironpdf.*;

public class ReadPDFExample {
    public static void main(String[] args) {
        // Load the PDF document
        PdfDocument pdf = PdfDocument.fromFile(Paths.get("assets/sample.pdf"));
        // Extract all the text from the document
        String text = pdf.extractAllText();
        // Output the extracted text
        System.out.println(text);
    }
}

In this code, PdfDocument.fromFile opens the PDF document, and Paths.get gets the path of the file. The extractAllText method reads all the text in the document.

2.3. Read Text from Specific Page

public class ReadSpecificPageExample {
    public static void main(String[] args) {
        // Load the PDF document
        PdfDocument pdf = PdfDocument.fromFile(Paths.get("assets/sample.pdf"));
        // Extract text from the second page (page index starts at 0)
        String text = pdf.extractTextFromPage(PageSelection.singlePage(1));
        // Output the extracted text from the specific page
        System.out.println(text);
    }
}

public class ReadSpecificPageExample {
    public static void main(String[] args) {
        // Load the PDF document
        PdfDocument pdf = PdfDocument.fromFile(Paths.get("assets/sample.pdf"));
        // Extract text from the second page (page index starts at 0)
        String text = pdf.extractTextFromPage(PageSelection.singlePage(1));
        // Output the extracted text from the specific page
        System.out.println(text);
    }
}

2.4. URL to PDF

We can also use IronPDF to convert a webpage to a PDF and then extract text from it. The following code generates a PDF from a URL and extracts all text from the website:

public class UrlToPdfExample {
    public static void main(String[] args) {
        // Render the website as a PDF
        PdfDocument pdf = PdfDocument.renderUrlAsPdf("https://unsplash.com/");
        // Extract all text from the generated PDF
        String text = pdf.extractAllText();
        // Output the extracted text
        System.out.println("Text extracted from the website: " + text);
    }
}

public class UrlToPdfExample {
    public static void main(String[] args) {
        // Render the website as a PDF
        PdfDocument pdf = PdfDocument.renderUrlAsPdf("https://unsplash.com/");
        // Extract all text from the generated PDF
        String text = pdf.extractAllText();
        // Output the extracted text
        System.out.println("Text extracted from the website: " + text);
    }
}

2.5. Extract Images From PDF

Additionally, IronPDF can be used to extract images from PDF files. The code below demonstrates the extraction of images:

import com.ironsoftware.ironpdf.License;
import com.ironsoftware.ironpdf.PdfDocument;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;
import javax.imageio.ImageIO;

public class ExtractImagesExample {
    public static void main(String[] args) throws IOException {
        // Set the IronPDF license key
        License.setLicenseKey("YOUR LICENSE KEY HERE");
        // Load the PDF document
        PdfDocument pdf = PdfDocument.fromFile(Paths.get("assets/sample.pdf"));

        try {
            // Extract all images from the PDF document
            List<BufferedImage> images = pdf.extractAllImages();
            // Output number of images extracted
            System.out.println("Number of images extracted from the website: " + images.size());

            // Save each extracted image to a file
            int i = 0;
            for (BufferedImage image : images) {
                ImageIO.write(image, "PNG", Files.newOutputStream(Path.of("assets/extracted_" + ++i + ".png")));
            }
        } catch (Exception exception) {
            System.out.println("Failed to extract images from the website");
            exception.printStackTrace();
        }
    }
}

import com.ironsoftware.ironpdf.License;
import com.ironsoftware.ironpdf.PdfDocument;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;
import javax.imageio.ImageIO;

public class ExtractImagesExample {
    public static void main(String[] args) throws IOException {
        // Set the IronPDF license key
        License.setLicenseKey("YOUR LICENSE KEY HERE");
        // Load the PDF document
        PdfDocument pdf = PdfDocument.fromFile(Paths.get("assets/sample.pdf"));

        try {
            // Extract all images from the PDF document
            List<BufferedImage> images = pdf.extractAllImages();
            // Output number of images extracted
            System.out.println("Number of images extracted from the website: " + images.size());

            // Save each extracted image to a file
            int i = 0;
            for (BufferedImage image : images) {
                ImageIO.write(image, "PNG", Files.newOutputStream(Path.of("assets/extracted_" + ++i + ".png")));
            }
        } catch (Exception exception) {
            System.out.println("Failed to extract images from the website");
            exception.printStackTrace();
        }
    }
}

3.1. Reading PDF Files with Qoppa PDF

Reading PDF files with Qoppa PDF in Java can be accomplished using the following sample code:

import com.qoppa.pdf.PDFImages;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.awt.Font;
import java.io.File;
import javax.imageio.ImageIO;

public class ReadPdfWithQoppa {
    public static void main(String[] args) {
        try {
            // Load the document
            PDFImages pdfDoc = new PDFImages("input.pdf", null);

            // Loop through pages
            for (int count = 0; count < pdfDoc.getPageCount(); ++count) {
                // Get an image of the PDF page at a resolution of 150 DPI
                BufferedImage pageImage = pdfDoc.getPageImage(count, 150);

                // Create a Graphics 2D from the page image
                Graphics2D g2d = pageImage.createGraphics();

                // Modify BufferedImage using drawing functions available in Graphics2D
                // Here is an example on how to add a watermark
                g2d.setFont(new Font("sansserif", Font.PLAIN, 200));
                g2d.rotate(Math.toRadians(45));
                g2d.setColor(new Color(128, 128, 128, 128));
                g2d.drawString("Watermark", 300, g2d.getFontMetrics().getMaxDescent());

                // Save the image as a JPEG
                File outputFile = new File("output_" + count + ".jpg");
                ImageIO.write(pageImage, "JPEG", outputFile);
                System.out.println("Page " + count + " processed.");
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import com.qoppa.pdf.PDFImages;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.awt.Font;
import java.io.File;
import javax.imageio.ImageIO;

public class ReadPdfWithQoppa {
    public static void main(String[] args) {
        try {
            // Load the document
            PDFImages pdfDoc = new PDFImages("input.pdf", null);

            // Loop through pages
            for (int count = 0; count < pdfDoc.getPageCount(); ++count) {
                // Get an image of the PDF page at a resolution of 150 DPI
                BufferedImage pageImage = pdfDoc.getPageImage(count, 150);

                // Create a Graphics 2D from the page image
                Graphics2D g2d = pageImage.createGraphics();

                // Modify BufferedImage using drawing functions available in Graphics2D
                // Here is an example on how to add a watermark
                g2d.setFont(new Font("sansserif", Font.PLAIN, 200));
                g2d.rotate(Math.toRadians(45));
                g2d.setColor(new Color(128, 128, 128, 128));
                g2d.drawString("Watermark", 300, g2d.getFontMetrics().getMaxDescent());

                // Save the image as a JPEG
                File outputFile = new File("output_" + count + ".jpg");
                ImageIO.write(pageImage, "JPEG", outputFile);
                System.out.println("Page " + count + " processed.");
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

3.2. Writing PDF Files with Qoppa PDF

Writing PDF files with Qoppa PDF in Java can be done using their APIs:

/*
 * This sample Java program uses jPDFWriter
 * to create a new PDF file, add a page to it
 * and draw an image and text on the page.
 */
package jPDFWriterSamples;

import java.awt.Color;
import java.awt.image.BufferedImage;
import java.awt.print.PageFormat;
import java.awt.print.Paper;
import java.io.File;
import javax.imageio.ImageIO;
import com.qoppa.pdfWriter.PDFDocument;
import com.qoppa.pdfWriter.PDFGraphics;
import com.qoppa.pdfWriter.PDFPage;

public class CreatePDFWithTextAndImage {
    public static void main(String [] args) {
        try {
            // Create a new PDF document
            PDFDocument pdfDoc = new PDFDocument();

            // Create a PageFormat of standard letter size with no margins
            Paper paper = new Paper();
            paper.setSize(8.5 * 72, 11 * 72);
            paper.setImageableArea(0, 0, 8.5 * 72, 11 * 72);
            PageFormat pf = new PageFormat();
            pf.setPaper(paper);

            // Create a new page and add it to the PDF
            PDFPage page = pdfDoc.createPage(pf);
            pdfDoc.addPage(page);

            // Get graphics from the page to draw content
            PDFGraphics g2d = (PDFGraphics) page.createGraphics();

            // Read an image (could be png, jpg, etc.)
            BufferedImage image = ImageIO.read(new File("C:\\photo.jpg"));

            // Draw the image on the page
            g2d.drawImage(image, 0, 0, null);

            // Set the font and color for the text
            g2d.setFont(PDFGraphics.HELVETICA.deriveFont(24f));
            g2d.setColor(Color.BLUE);

            // Draw text on the graphics object of the page
            g2d.drawString("NEW TEXT", 200, 30);

            // Save the document to a file
            pdfDoc.saveDocument("C:\\output.pdf");
            System.out.println("PDF created successfully.");
        } catch (Throwable t) {
            System.out.println("Error creating PDF.");
            t.printStackTrace();
        }
    }
}

/*
 * This sample Java program uses jPDFWriter
 * to create a new PDF file, add a page to it
 * and draw an image and text on the page.
 */
package jPDFWriterSamples;

import java.awt.Color;
import java.awt.image.BufferedImage;
import java.awt.print.PageFormat;
import java.awt.print.Paper;
import java.io.File;
import javax.imageio.ImageIO;
import com.qoppa.pdfWriter.PDFDocument;
import com.qoppa.pdfWriter.PDFGraphics;
import com.qoppa.pdfWriter.PDFPage;

public class CreatePDFWithTextAndImage {
    public static void main(String [] args) {
        try {
            // Create a new PDF document
            PDFDocument pdfDoc = new PDFDocument();

            // Create a PageFormat of standard letter size with no margins
            Paper paper = new Paper();
            paper.setSize(8.5 * 72, 11 * 72);
            paper.setImageableArea(0, 0, 8.5 * 72, 11 * 72);
            PageFormat pf = new PageFormat();
            pf.setPaper(paper);

            // Create a new page and add it to the PDF
            PDFPage page = pdfDoc.createPage(pf);
            pdfDoc.addPage(page);

            // Get graphics from the page to draw content
            PDFGraphics g2d = (PDFGraphics) page.createGraphics();

            // Read an image (could be png, jpg, etc.)
            BufferedImage image = ImageIO.read(new File("C:\\photo.jpg"));

            // Draw the image on the page
            g2d.drawImage(image, 0, 0, null);

            // Set the font and color for the text
            g2d.setFont(PDFGraphics.HELVETICA.deriveFont(24f));
            g2d.setColor(Color.BLUE);

            // Draw text on the graphics object of the page
            g2d.drawString("NEW TEXT", 200, 30);

            // Save the document to a file
            pdfDoc.saveDocument("C:\\output.pdf");
            System.out.println("PDF created successfully.");
        } catch (Throwable t) {
            System.out.println("Error creating PDF.");
            t.printStackTrace();
        }
    }
}

4.1. Simplicity

One of the main advantages of IronPDF is its simplicity. IronPDF has a straightforward API that is easy to use, even for beginners. Developers can easily create and modify PDF documents with just a few lines of code. In contrast, Qoppa PDF has a more complex API, which can be daunting for new users.

4.2. Compatibility

IronPDF is compatible with a wide range of platforms and frameworks, including Java, .NET, ASP.NET, and .NET Core. IronPDF also supports a range of file formats, including HTML, CSS, and SVG. This makes it easy for developers to integrate IronPDF into their existing applications.

In contrast, Qoppa PDF has limited compatibility with platforms other than Java. This can be a drawback for developers who work with other programming languages.

4.3. Performance

IronPDF is designed to be fast and efficient, even when working with large PDF documents. IronPDF uses optimized algorithms to ensure that PDF manipulation is performed quickly and smoothly. This is especially important for applications that need to handle a large volume of PDF files.

IronPDF's performance is impressive, even when working with large PDF files. This is due to IronPDF's optimized algorithms and efficient memory management.

5.1. IronPDF Pricing and Licensing

IronPDF offers a simple and transparent pricing model based on the number of developers who will be using the tool. You can purchase a license for a single developer, a team of developers, or an enterprise with unlimited developers.

With the purchase of a license, you can use IronPDF in any number of projects, and you will receive free updates and technical support for one year. After the first year, you can choose to renew your license for a discounted price.

5.2. Qoppa PDF Pricing and Licensing

Qoppa PDF offers a variety of licensing options, including perpetual licenses, annual licenses, and subscription licenses.

In terms of pricing and licensing, IronPDF offers a simpler and more transparent approach. The pricing is based on the number of developers using the tool, and there are no hidden fees or additional costs.