速学 | 如何帮女朋友用Java合并两个PDF

今天女朋友要我帮她把两个PDF合并成一个，当时太忙没来得及弄，却被打印店老板抢了风头，越想越气。想来我怎么也是个java小菜鸡，这么强大的Java生态肯定有操作PDF的。于是立马百度大法作此文章！

    com.itextpdf
    itextpdf
    5.4.3

package pdf;
import java.io.FileOutputStream;
import com.itextpdf.text.document;
import com.itextpdf.text.pdf.PdfCopy;
import com.itextpdf.text.pdf.PdfimportedPage;
import com.itextpdf.text.pdf.PdfReader;



public class PDF {
    public static void main(String[] args) {
        String[] files = {  "D:\OneDrive\桌面\Java实习_王泽_22届.pdf", "D:\OneDrive\桌面\Java后端_王泽_22届.pdf"};
        String savePath = "D:\OneDrive\桌面\test.pdf";
        Boolean bool = mergePdfFiles(files, savePath);
        if (bool){
            System.out.println("合并成功,新pdf路径为:"+savePath);
        }else {
            System.out.println("合并失败，请检查路径");
        }
        
    }

    

    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 (String file : files) {
                PdfReader reader = new PdfReader(file);
                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) {
            System.out.println(e);
        } finally {
            System.out.println("执行结束");
            document.close();
        }
        return retValue;
    }
}

结束语：人民有信仰国家有力量，老子有对象！