package com.boss.fiscal.report.utils;

import com.lowagie.text.Document;
import com.lowagie.text.pdf.PdfCopy;
import com.lowagie.text.pdf.PdfImportedPage;
import com.lowagie.text.pdf.PdfReader;

import java.io.FileOutputStream;

public class demo {
    public static void main(String[] args) {
        String[] files = {"D:\\e.pdf", "D:\\e1.pdf"};
        String savepath = "D:\\temp.pdf";
        mergePdfFiles(files, savepath);
    } /*
     * * 合並pdf文件 * * @param files 要合並文件數組(絕對路徑如{ "e:\\1.pdf", "e:\\2.pdf" ,
     * "e:\\3.pdf"}) * @param newfile
     * 合並後新產生的文件絕對路徑如e:\\temp.pdf,請自己刪除用過後不再用的文件請 * @return boolean
     * 產生成功返回true, 否則返回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;
    }

}