java实现PDF 转WORD

CSDN话题挑战赛第2期
参赛话题：Java技术分享

引言

由于市场上目前的各种格式文件的转换基本上都需要会员,怎么办呢?

不走寻常路,我们是程序员

我们当然要不走寻常路了,我们要动用一些特殊手段,展示!!

直接开干,也有demo,可供下载

这是个人新建的一个项目:gitee项目链接word
首先,创建一个springboot项目
然后由于有一个jar包无法下载,所以咱们直接去maven仓库下载
仓库地址为:maven仓库地址

下载后,放入项目中

项目pom所有内容

    4.0.0
    
        org.springframework.boot
        spring-boot-starter-parent
        2.7.2
         
    
    com.pdf
    word
    0.0.1-SNAPSHOT
    word
    Demo project for Spring Boot
    
        1.8
    
    
        
            org.springframework.boot
            spring-boot-starter
        

        
            org.springframework.boot
            spring-boot-devtools
            runtime
            true
        
        
            org.projectlombok
            lombok
            true
        
        
            org.springframework.boot
            spring-boot-starter-test
            test
        
        
            org.javassist
            javassist
            3.20.0-GA
        
        
        
            com.aspose
            aspose-pdf
            21.6
            system
            ${project.basedir}/libs/aspose-pdf-21.6.jar
        
    

    
        
            AsposeJavaAPI
            Aspose Java API
            https://repository.aspose.com/repo/
        
    

    
        
            
                org.springframework.boot
                spring-boot-maven-plugin
                
                    
                        
                            org.projectlombok
                            lombok
                        
                    
                    true
                    word
                
                
                    
                        
                            repackage
                        
                    
                
            
        
    

这个类PDFJarCrack 是用来破解pdf的jar包的类,将开始下载的jar全路径放入,然后运行,会在同级生成一个jar包,将原有的删掉,用新生成的替换(如果自己操作可以这样), 我上面给出的项目中的jar包已经是 生成的破解jar包
运行这个类PDFHelper3 可以直接将一个pdf转为word

破解类

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;

/**
 * @date 2022-05-16
 * @user tarzan
 */
public class PDFJarCrack {


    public static void main(String[] args) throws Exception {
        String jarPath = "D:\\word\\libs\\aspose-pdf-21.6.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 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();
    }
}

转换类

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\\DELL\\Desktop\\20220816150519.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();
        }
    }


}

难点分析

这里面主要是那个文件其实是需要破解的,然后我提供的链接下载中的项目 jar包已经破解过了,可以直接使用;

技术小结

这里面不仅支持pdf转word,还支持其他格式的转换,感兴趣的小伙伴,可以自行尝试!!