<dependency>

      <groupId>org.apache.pdfbox</groupId>

      <artifactId>pdfbox-app</artifactId>

      <version>1.8.10</version>

 </dependency>

package com.everjiankang;

import java.io.File;

import org.apache.pdfbox.pdmodel.PDDocument;

/**运行效率很慢，因为每次删除一页就读取和保存一次文件,初始文件名格式：xxxx0.pdf*/

public class Test {

    static String  name_pre = "C:\\log\\jvm";    //文件名前缀

    static String  name_after = ".pdf";//文件名后缀

    public static void main(String[] args) {

        //1.刪除前n頁

//        cutPdfPreNPage(2);

        //2.刪除后n頁

        cutPdfAfterNPage(5);

        //3.刪除第n頁

        cutPdf(name_pre + 0 + name_after,name_pre + (0+1) + name_after,7);//删除第n页

    }

    /**

     * 删除前n页

     * @param n

     */

    public static void cutPdfPreNPage(int n) {

        for(int i = 0; i < n; i++)

            cutPdf(name_pre + i + name_after,name_pre + (i+1) + name_after,0);

    }

    /**

     * 删除后n页

     * @param n

     */

    public static void cutPdfAfterNPage(int n) {

        for(int i = 0; i < n; i++)

            cutPdf(name_pre + i + name_after,name_pre + (i+1) + name_after,1);

    }

    /**

     *

     * @param pdfPath        旧路径

     * @param newPdfPath    新路径

     * @param flag            0：第一页；1：最后一页 ；else : 要删除的页码

     */

    public static void cutPdf(String pdfPath,String newPdfPath, int flag)

    {

        File file = new File(pdfPath);

        PDDocument document = new PDDocument();

        try{

            document = PDDocument.load(file);

        }catch(Exception e){

            e.printStackTrace();

        }

        int noOfPages = document.getNumberOfPages();

        System.out.println(noOfPages);

        if(flag == 0)

            document.removePage(0);

        else if(flag == 1) {

            document.removePage(noOfPages-1);

        } else {

            document.removePage(flag-1);

        }

        try{

            document.save(newPdfPath);

            document.close();

        }catch(Exception e){

            e.printStackTrace();

        }

        System.out.println("已经转完了哦");

    }

}

<dependency>

    <groupId>com.itextpdf</groupId>

    <artifactId>itextpdf</artifactId>

    <version>5.5.13</version>

</dependency>

 /**

     * 截取pdfFile的第from页至第end页，组成一个新的文件名

     * @param pdfFile  需要分割的PDF

     * @param savepath  新PDF

     * @param from  起始页

     * @param end  结束页

     */

    public static void splitPDFFile(String respdfFile,

            String savepath, int from, int end) {

        Document document = null;

        PdfCopy copy = null;

        try {

            PdfReader reader = new PdfReader(respdfFile);

            int n = reader.getNumberOfPages();

            if(end==0){

                end = n;

            }

            ArrayList<String> savepaths = new ArrayList<String>();

            String staticpath = respdfFile.substring(0, respdfFile.lastIndexOf("\\")+1);

            //String savepath = staticpath+ newFile;

            savepaths.add(savepath);

            document = new Document(reader.getPageSize(1));

            copy = new PdfCopy(document, new FileOutputStream(savepaths.get(0)));

            document.open();

            for(int j=from; j<=end; j++) {

                document.newPage();

                PdfImportedPage page = copy.getImportedPage(reader, j);

                copy.addPage(page);

            }

            document.close();  

        } catch (IOException e) {

            e.printStackTrace();

        } catch(DocumentException e) {

            e.printStackTrace();

        }

    }