多个pdf文件合并

向右看齐 2024-04-01 16:52 110阅读 0赞

使用maven引入jar包：

<dependency>
        <groupId>com.lowagie</groupId>
        <artifactId>itext</artifactId>
        <version>2.1.7</version>
    </dependency>

可以使用工具类和测试Utile测试一下~

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 PdfUtil {
     
        /**
         * 合并pdf
         * @param files 需要合并的pdf路径
         * @param newfile 合并成新的文件的路径
         */
        public static boolean mergePdfFiles(String[] files, String newfile) {
            boolean retValue = false;
            Document document = null;
            PdfCopy copy = null;
            PdfReader reader = null;
            try {
                document = new Document(new PdfReader(files[0]).getPageSize(1));
                copy = new PdfCopy(document, new FileOutputStream(newfile));
                document.open();
                for (int i = 0; i < files.length; i++) {
                    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);
                    }
    				reader.close();
                }
                retValue = true;
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                if (reader != null) {
                    reader.close();
                }
                if (copy != null) {
                    copy.close();
                }
                if (document != null) {
                    document.close();
                }
            }
            return retValue;
        }
     
        public static void main(String[] args) {
            String[] files = {"D:\wanyi_az\Dict\a.pdf","D:\wanyi_az\Dict\b.pdf","D:\wanyi_az\Dict\c.pdf" };
            String savepath = "D:\wanyi_az\Dict\back.pdf";
            boolean b = mergePdfFiles(files, savepath);
            System.out.println(b);
        }
    }