PDFレポートのマージ

import java.io.FileOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.pdf.PdfCopy;
import com.lowagie.text.pdf.PdfImportedPage;
import com.lowagie.text.pdf.PdfReader;

public class MergeFile {
    public static void main(String[] args) {
        String[] files = {"e:\\XSLFO.Mar07.XVPAV.pdf", "e:\\F00000JUUC.pdf", "e:\\F00000OLVX.pdf","e:\\XSLFO.Mar07.XVPZU.pdf"};
        String savepath = "e:\\temp.pdf";
        mergePdfFiles(files, savepath);
    } /*
         * *  pdf  * * @param files  ( { "e:\\1.pdf", "e:\\2.pdf" ,
         * "e:\\3.pdf"}) * @param newfile
         *  e:\\temp.pdf,  * @return boolean
         *  true,  false
         */

    public static boolean mergePdfFiles(String[] files, String newfile) {
        boolean retValue = false;
        Document document = null;
        try {
            document = new Document(new PdfReader(files[0]).getPageSize(1));
            PdfCopy copy = new PdfCopy(document, new FileOutputStream(newfile));
            document.open();
            for (int i = 0; i < files.length; i++) {
                PdfReader reader = new PdfReader(files[i]);
                int n = reader.getNumberOfPages();
                for (int j = 1; j <= n; j++) {
                    document.newPage();
                    PdfImportedPage page = copy.getImportedPage(reader, j);
                    copy.addPage(page);
                }
            }
            retValue = true;
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            document.close();
        }
        return retValue;
    }
}