Java中将多个PDF文件合并为一个PDF的方法步骤

<repositories>
    <repository>
        <id>com.e-iceblue</id>
        <name>e-iceblue</name>
        <url>https://repo.e-iceblue.com/nexus/content/groups/public/</url>
    </repository>
</repositories>
<dependencies>
    <dependency>
        <groupId>e-iceblue</groupId>
        <artifactId>spire.pdf</artifactId>
        <version>9.5.6</version>
    </dependency>
</dependencies>

import com.spire.pdf.*;
public class mergePDF {
    public static void main(String[] args) throws Exception {
        //Get the paths of the documents to be merged
        String[] files = new String[] {
                "D:\\sample.pdf",
                "D:\\sample1.pdf"};
        //Merge documents and return an object of PdfDocumentBase
        PdfDocumentBase pdf = PdfDocument.mergeFiles(files);
        //Save the result to a PDF file
        pdf.save("MergedPDF.pdf", FileFormat.PDF);
    }
}

import com.spire.pdf.*;
import java.io.*;
public class mergePDFbyStream {
    public static void main(String[] args) throws Exception {
        FileInputStream stream1 = new FileInputStream(new File("sample.pdf"));
        FileInputStream stream2 = new FileInputStream(new File("sample1.pdf"));
        InputStream[] streams = new FileInputStream[]{stream1, stream2};
        //Merge these documents and return an object of PdfDocumentBase
        PdfDocumentBase pdf = PdfDocument.mergeFiles(streams);
        //Save the result to a PDF file
        pdf.save("MergedPDF.pdf", FileFormat.PDF);
    }
}