Java实现PDF转Word的示例代码(无水印无页数限制)

2022-11-13 08:11:08 示例水印页数

一、前言

学习概述：简单的介绍一下本篇文章要讲解的Java知识点

学习目标：读者读完这篇文章之后，你希望他掌握你讲解的哪些重要的知识点

二、jar破解

1.项目远程仓库配置

aspose-pdf 这个需要配置单独的仓库地址才能下载，不会配置的可以去官网直接下载jar引入项目代码中。

<repositories>
        <repository>
            <id>AsposeJavaapi</id>
            <name>Aspose Java API</name>
            <url>https://repository.aspose.com/repo/</url>
        </repository>
    </repositories>

2.pom文件引入相关依赖

    <dependency>
            <groupId>org.javassist</groupId>
            <artifactId>javassist</artifactId>
            <version>3.20.0-GA</version>
        </dependency>
        <!-- Https://mvnrepository.com/artifact/com.aspose/aspose-pdf -->
        <dependency>
            <groupId>com.aspose</groupId>
            <artifactId>aspose-pdf</artifactId>
            <version>21.8</version>
        </dependency>

Javassist是一个开源的分析、编辑和创建Java字节码的类库。

aspose-pdf是一个处理pdf的java类库。

3.破解代码

 
 
import javassist.*;
 
import java.io.*;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.jar.JarOutputStream;
 

public class PDFJarCrack {
 
 
    public static void main(String[] args) throws Exception {
        String jarPath = "E:\\Maven_repository\\com\\aspose\\aspose-pdf\\21.8\\aspose-pdf-21.8.jar";
        crack(jarPath);
    }
 
 
    private static void crack(String jarName) {
        try {
            ClassPool.getDefault().insertClassPath(jarName);
            CtClass ctClass = ClassPool.getDefault().getCtClass("com.aspose.pdf.ADocument");
            CtMethod[] declaredMethods = ctClass.getDeclaredMethods();
            int num = 0;
            for (int i = 0; i < declaredMethods.length; i++) {
                if (num == 2) {
                    break;
                }
                CtMethod method = declaredMethods[i];
                CtClass[] ps = method.getParameterTypes();
                if (ps.length == 2
                        && method.getName().equals("lI")
                        && ps[0].getName().equals("com.aspose.pdf.ADocument")
                        && ps[1].getName().equals("int")) {
                    // 最多只能转换4页 处理
                    System.out.println(method.getReturnType());
                    System.out.println(ps[1].getName());
                    method.setBody("{return false;}");
                    num = 1;
                }
                if (ps.length == 0 && method.getName().equals("lt")) {
                    // 水印处理
                    method.setBody("{return true;}");
                    num = 2;
                }
            }
            File file=new File(jarName);
            ctClass.writeFile(file.getParent());
            disposeJar(jarName, file.getParent()+"/com/aspose/pdf/ADocument.class");
            } catch(NotFoundException e){
                e.printStackTrace();
            } catch(CannotCompileException e){
                e.printStackTrace();
            } catch (IOException e) {
            e.printStackTrace();
            }
 
    }
 
    private static void disposeJar(String jarName, String replaceFile) {
        List<String> deletes = new ArrayList<>();
        deletes.add("META-INF/37E3C32D.SF");
        deletes.add("META-INF/37E3C32D.RSA");
        File oriFile = new File(jarName);
       if (!oriFile.exists()) {
            System.out.println("######Not Find File:" + jarName);
            return;
        }
        //将文件名命名成备份文件
        String bakJarName = jarName.substring(0, jarName.length() - 3) + "cracked.jar";
     //   File bakFile=new File(bakJarName);
        try {
        //创建文件（根据备份文件并删除部分）
        JarFile jarFile = new JarFile(jarName);
        JarOutputStream jos = new JarOutputStream(new FileOutputStream(bakJarName));
        Enumeration entries = jarFile.entries();
        while (entries.hasMoreElements()) {
            JarEntry entry = (JarEntry) entries.nextElement();
            if (!deletes.contains(entry.getName())) {
                if(entry.getName().equals("com/aspose/pdf/ADocument.class")){
                    System.out.println("Replace:-------" +entry.getName());
                    JarEntry jarEntry = new JarEntry(entry.getName());
                    jos.putNextEntry(jarEntry);
                    FileInputStream  fin = new FileInputStream(replaceFile);
                    byte[] bytes = readStream(fin);
                    jos.write(bytes, 0, bytes.length);
                }else {
                    jos.putNextEntry(entry);
                    byte[] bytes = readStream(jarFile.getInputStream(entry));
                    jos.write(bytes, 0, bytes.length);
                }
            } else {
                System.out.println("Delete:-------" + entry.getName());
            }
         }
            jos.flush();
            jos.close();
            jarFile.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
 
    private static byte[] readStream(InputStream inStream) throws Exception {
        ByteArrayOutputStream outSteam = new ByteArrayOutputStream();
        byte[] buffer = new byte[1024];
        int len = -1;
        while ((len = inStream.read(buffer)) != -1) {
            outSteam.write(buffer, 0, len);
        }
        outSteam.close();
        inStream.close();
        return outSteam.toByteArray();
    }

修改你本机的aspose-pdf-21.8.jar路径，然后运行主方法，破解成功后，会再同级文件夹下生成一个aspose-pdf-21.8.cracked.jar包，用这个包替换原来的aspose-pdf-21.8.jar包即可。

控制台输出

三、pdf转word

代码实现

 
import com.aspose.pdf.Document;
import com.aspose.pdf.SaveFORMat;
 
import java.io.*;
 
public class PDFHelper3 {
 
    public static void main(String[] args) throws IOException {
        pdf2doc("C:\\Users\\liuya\\Desktop\\pdf\\中信重工铸锻公司数字化工厂技术要求.pdf");
    }
 
 
    //pdf转doc
    public static void pdf2doc(String pdfPath) {
        long old = System.currentTimeMillis();
        try {
            //新建一个word文档
            String wordPath=pdfPath.substring(0,pdfPath.lastIndexOf("."))+".docx";
            FileOutputStream os = new FileOutputStream(wordPath);
            //doc是将要被转化的word文档
            Document doc = new Document(pdfPath);
            //全面支持DOC, DOCX, OOXML, RTF html, OpenDocument, PDF, EPUB, XPS, SWF 相互转换
            doc.save(os, SaveFormat.DocX);
            os.close();
            //转化用时
            long now = System.currentTimeMillis();
            System.out.println("Pdf 转 Word 共耗时：" + ((now - old) / 1000.0) + "秒");
        } catch (Exception e) {
            System.out.println("Pdf 转 Word 失败...");
            e.printStackTrace();
        }
    }
 
 
}

修改自己的pdf文件路径，运行主方法即可，完成无水印，无页数限制转换word文件