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;
/**
* @date 2022-05-16
* @user tarzan
*/
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
控制台输出
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