[Java]PDFBoxでPDFを分割する

package com.example;

import org.apache.pdfbox.multipdf.Splitter;
import org.apache.pdfbox.pdmodel.PDDocument;

import java.io.File;
import java.io.IOException;
import java.util.List;

public class PDFBoxExample {

    public static void main(String[] args) throws IOException {
        try (PDDocument source = PDDocument.load(new File("input.pdf"))) {
            Splitter splitter = new Splitter();
            List<PDDocument> documents = splitter.split(source);
            for (int i = 0; i < documents.size(); i++) {
                PDDocument document = documents.get(i);
                document.save("out" + i + ".pdf");
            }
        }
    }

}