Cómo Unir Dos Archivos PDF Usando Java

Creating Two New PDF Documents and Merge Them Together

import com.ironsoftware.ironpdf.PdfDocument;

import java.io.IOException;
import java.nio.file.Paths;

// This class demonstrates how to create and merge two PDF documents using the IronPDF library.
public class Main {
    public static void main(String[] args) throws IOException {
        // Define the HTML content for the first PDF document
        String htmlA = "<p> [PDF_1] </p>"
                + "<p> Hi this is the first PDF </p>";
        // Define the HTML content for the second PDF document
        String htmlB = "<p> [PDF_2] </p>"
                + "<p> This is the 2nd PDF </p>";

        // Render the HTML content to create two separate PDF documents
        PdfDocument pdfA = PdfDocument.renderHtmlAsPdf(htmlA);
        PdfDocument pdfB = PdfDocument.renderHtmlAsPdf(htmlB);
        // Merge the two PDF documents into one
        PdfDocument merged = PdfDocument.merge(pdfA, pdfB);

        // Save the merged PDF document to the specified path
        merged.saveAs(Paths.get("assets/merged.pdf"));
    }
}

import com.ironsoftware.ironpdf.PdfDocument;

import java.io.IOException;
import java.nio.file.Paths;

// This class demonstrates how to create and merge two PDF documents using the IronPDF library.
public class Main {
    public static void main(String[] args) throws IOException {
        // Define the HTML content for the first PDF document
        String htmlA = "<p> [PDF_1] </p>"
                + "<p> Hi this is the first PDF </p>";
        // Define the HTML content for the second PDF document
        String htmlB = "<p> [PDF_2] </p>"
                + "<p> This is the 2nd PDF </p>";

        // Render the HTML content to create two separate PDF documents
        PdfDocument pdfA = PdfDocument.renderHtmlAsPdf(htmlA);
        PdfDocument pdfB = PdfDocument.renderHtmlAsPdf(htmlB);
        // Merge the two PDF documents into one
        PdfDocument merged = PdfDocument.merge(pdfA, pdfB);

        // Save the merged PDF document to the specified path
        merged.saveAs(Paths.get("assets/merged.pdf"));
    }
}

New PDF File Merger

Combine Existing Files into One PDF

IronPDF allows you to merge existing PDF files into one common PDF file. Just specify the list of PDF input files. IronPDF will merge all PDF files into a single PDF document and save it to the destination file. The output will contain the result of the successfully merged PDF files.

import com.ironsoftware.ironpdf.PdfDocument;

import java.io.IOException;
import java.nio.file.Paths;

// This class demonstrates how to merge existing PDF files using the IronPDF library.
public class Main {
    public static void main(String[] args) throws IOException {
        // Load the existing PDF files from the specified paths
        PdfDocument pdfA = PdfDocument.fromFile(Paths.get("assets/1.pdf"));
        PdfDocument pdfB = PdfDocument.fromFile(Paths.get("assets/2.pdf"));
        // Merge the two PDF documents into one
        PdfDocument merged = PdfDocument.merge(pdfA, pdfB);

        // Save the merged PDF document to the specified path
        merged.saveAs(Paths.get("assets/merged.pdf"));
    }
}

import com.ironsoftware.ironpdf.PdfDocument;

import java.io.IOException;
import java.nio.file.Paths;

// This class demonstrates how to merge existing PDF files using the IronPDF library.
public class Main {
    public static void main(String[] args) throws IOException {
        // Load the existing PDF files from the specified paths
        PdfDocument pdfA = PdfDocument.fromFile(Paths.get("assets/1.pdf"));
        PdfDocument pdfB = PdfDocument.fromFile(Paths.get("assets/2.pdf"));
        // Merge the two PDF documents into one
        PdfDocument merged = PdfDocument.merge(pdfA, pdfB);

        // Save the merged PDF document to the specified path
        merged.saveAs(Paths.get("assets/merged.pdf"));
    }
}

Existing PDF Merger Output

Merging More Than Two PDF Documents

You can easily merge more than two PDF files using IronPDF for Java.

import com.ironsoftware.ironpdf.PdfDocument;

import java.io.IOException;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;

// This class demonstrates how to merge more than two PDF documents using the IronPDF library.
public class Main {
    public static void main(String[] args) throws IOException {
        // Create a list to hold the PDF documents
        List<PdfDocument> pdfList = new ArrayList<>();
        // Add existing PDF files to the list
        pdfList.add(PdfDocument.fromFile(Paths.get("assets/1.pdf")));
        pdfList.add(PdfDocument.fromFile(Paths.get("assets/2.pdf")));
        pdfList.add(PdfDocument.fromFile(Paths.get("assets/3.pdf")));
        // Merge all PDF documents in the list into one
        PdfDocument merged = PdfDocument.merge(pdfList);
        // Save the merged PDF document to the specified path
        merged.saveAs(Paths.get("assets/merged.pdf"));
    }
}

import com.ironsoftware.ironpdf.PdfDocument;

import java.io.IOException;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;

// This class demonstrates how to merge more than two PDF documents using the IronPDF library.
public class Main {
    public static void main(String[] args) throws IOException {
        // Create a list to hold the PDF documents
        List<PdfDocument> pdfList = new ArrayList<>();
        // Add existing PDF files to the list
        pdfList.add(PdfDocument.fromFile(Paths.get("assets/1.pdf")));
        pdfList.add(PdfDocument.fromFile(Paths.get("assets/2.pdf")));
        pdfList.add(PdfDocument.fromFile(Paths.get("assets/3.pdf")));
        // Merge all PDF documents in the list into one
        PdfDocument merged = PdfDocument.merge(pdfList);
        // Save the merged PDF document to the specified path
        merged.saveAs(Paths.get("assets/merged.pdf"));
    }
}