Maven依賴

        <!-- PDF拆分與合併工具-->
        <dependency>
            <groupId>org.apache.pdfbox</groupId>
            <artifactId>pdfbox</artifactId>
            <version>2.0.22</version>
        </dependency>

測試程式碼

package com;
import java.io.File;
import java.io.IOException;
import java.util.List;
import org.apache.pdfbox.multipdf.Splitter;
import org.apache.pdfbox.pdmodel.PDDocument;
public class PDFSplit {
    public static void main(String[] args) throws IOException {
        Splitter splitter = new Splitter();
        // 設定起始頁、結束頁，每個檔案的頁數
        splitter.setStartPage(5);
        splitter.setEndPage(6);
        splitter.setSplitAtPage(2);
        PDDocument source = PDDocument.load(new File("C:/Users/Administrator/Desktop/檔名"));
        List<PDDocument> list = splitter.split(source);

        int i = 0;
        for (PDDocument document : list) {
            i++;
            document.save("C:/Users/Administrator/Desktop/" + "out" + i + ".pdf");
        }
    }
}